Bulletin, Dec 25: Solar Industry Updates & Strategic Insights for 2026

As the year draws to a close, December’s bulletin provides a consolidated overview of key announcements published across the McKercher Corporation family of brands, including PSW Energy and Perth Solar Warehouse. These updates reflect a month focused on forward planning, technical clarity, policy responsiveness, and strengthening supply-chain and manufacturer partnerships in a rapidly evolving energy landscape.

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Key points

  • December 2025 focused on strategic alignment and forward planning, with clear operational objectives for 2026, an updated technical product roadmap, and refined installation timeframes reinforcing McKercher Corporation’s commitment to quality, compliance, and sustainable growth.
  • The month highlighted significant technical and regulatory developments, including clarified testing requirements for hybrid inverters, expanded government support through the Cheaper Home Batteries Program, and increased emphasis on installer performance standards from global manufacturers such as Tesla.
  • Strengthened partnerships and supply-chain decisions underscored McKercher Corporation’s industry leadership, including the adoption of Australian-made Tindo Solar panels and enhanced manufacturer support from Sigenergy during a period of heightened regulatory and market complexity.

This bulletin is designed to serve both internal teams and external industry partners by offering operational context, strategic insight, and clarity around regulatory and product developments that shape our collective work.

Tesla Installer Performance Score (TIPS)

The release of the Tesla Installer Performance Score (TIPS) explainer provided clarity on how Tesla evaluates installer performance and the implications this has for approved partners. The announcement detailed the metrics underpinning TIPS, including installation quality, commissioning accuracy, customer feedback, and compliance documentation, highlighting how these factors directly influence installer standing and access to future work.

For McKercher Corporation teams and industry collaborators, this update reinforced the importance of precision and process discipline when delivering Tesla-integrated systems. Understanding TIPS is not simply about meeting manufacturer requirements; it reflects a broader industry shift toward data-driven performance evaluation. By proactively educating staff and partners, McKercher Corporation demonstrated its commitment to transparency and preparedness, ensuring alignment with global OEM expectations while maintaining long-term relationships with installers. Further learning ›

Testing Requirements for Grid-Connected Hybrid Inverters

The announcement addressing testing requirements for grid-connected multiple-mode (hybrid) inverters provided essential guidance amid evolving regulatory expectations. It clarified testing obligations under Australian Standards, focusing on correct commissioning, grid interaction behaviour, and fail-safe operation across various operating modes. This update responded to increased scrutiny from regulators and network service providers as hybrid systems become more prevalent.

For technical teams and external installers, the guidance served as both a compliance reference and a risk-mitigation tool. Ensuring that hybrid inverters are tested correctly protects grid stability and reduces the likelihood of post-installation faults or compliance disputes. By publishing this clarification, McKercher Corporation reinforced its role as an informed industry participant committed to supporting the safe integration of advanced energy technologies. Testing requirements ›

Refined Installation Timeframes Strengthen Quality and Compliance

PSW Energy announced refined installation timeframes designed better to align scheduling with quality assurance and compliance requirements. The update acknowledged increasing technical complexity across residential and commercial systems, particularly as battery storage, hybrid inverters, and advanced monitoring become standard. Adjusted timeframes allow installation teams to complete work methodically without compromising safety or regulatory obligations.

This refinement supports installers by reducing pressure to accelerate tasks that require careful verification and documentation. For customers and partners, it reinforces PSW Energy’s commitment to long-term system performance rather than short-term throughput. The change reflects a strategic decision to prioritise consistency, audit readiness, and post-installation reliability, strengthening PSW Energy’s reputation as a quality-led operator in a competitive market. Read more ›

PSW Adopts Australian-Made Tindo Solar Panels

PSW Energy and Perth Solar Warehouse formally announced the adoption of Australian-made Tindo Solar panels as a mainstream product offering, marking a strategic investment in domestic manufacturing. The decision reflects growing recognition of supply-chain resilience, local quality control, and the broader economic benefits of supporting Australian industry within the renewable energy sector.

For customers and partners, this move signals confidence in locally manufactured products that meet stringent performance and durability standards. Internally, it aligns procurement strategies with sustainability values and long-term availability considerations. By integrating Tindo Solar panels into the product mix, McKercher Corporation strengthens its ability to offer reliable solutions while contributing to the development of Australia’s clean-energy manufacturing capability. Learn more ›

Cheaper Home Batteries Program Expanded

The expansion of the Cheaper Home Batteries Program on December 13 represented a significant policy development with direct implications for customers and installers. The announcement outlined expanded eligibility criteria, increased funding allocations, and updated administrative requirements, creating new opportunities for households to adopt energy storage solutions from May 1, 2026.

McKercher Corporation’s analysis focused on translating policy detail into practical guidance for teams and partners. Understanding eligibility thresholds, documentation requirements, and system specifications is crucial for delivering compliant installations and providing accurate customer advice. By responding promptly to the policy update, the corporation reinforced its role as a trusted intermediary between government initiatives and on-the-ground delivery, ensuring that program benefits are realised without compromising quality or compliance. Details ›

Sigenergy Supports Australian Installers

The December announcement highlighted Sigenergy’s expanded support for Australian installers during a period marked by regulatory change, product recalls, and heightened compliance scrutiny. The update offers an installer-focused rebate designed to help installers navigate complexity while maintaining installation standards in instances where project timelines have been forcibly delayed beyond their control.

For McKercher Corporation and its partners, this commitment from Sigenergy strengthens confidence in long-term collaboration. Manufacturer support plays a crucial role in ensuring system reliability and installer capability, particularly as energy storage and hybrid solutions become increasingly sophisticated. The announcement highlighted the importance of proactive manufacturer-installer relationships in maintaining industry credibility and customer trust during challenging market conditions. Learn more ›

2025/26 Technical Product Road Map

Version 5.12.1 of the 2025/26 Technical Product Road Map provided a comprehensive overview of approved technologies, phased product introductions, and planned transitions across McKercher Corporation brands. The roadmap addresses inverter platforms, battery systems, solar panels, electric vehicle charging equipment and balance-of-system components, ensuring alignment between sales, design, and installation teams.

For external partners, the roadmap provides predictability and transparency, enabling forward planning and effective inventory coordination. Internally, it acts as a governance tool, reducing ad-hoc product adoption and ensuring technical consistency across projects. Regular updates to the roadmap reflect McKercher Corporation’s commitment to controlled innovation, striking a balance between access to new technologies and proven performance and compliance assurance. Product road map ›

2026 Operational Objectives & Target Plan — Internal Briefing

The 2026 Operational Objectives & Target Plan set the strategic foundation for McKercher Corporation’s next phase of growth, aligning operational execution with long-term commercial and quality objectives. The briefing outlined clear performance targets across safety, installation quality, customer satisfaction, and supply-chain resilience, reflecting lessons learned during a period of sustained industry change. Emphasis was placed on disciplined growth, capacity planning, and maintaining consistency across brands as volumes and regulatory complexity increase.

For internal teams, the plan reinforces accountability frameworks and measurable benchmarks that will guide decision-making throughout 2026. For partners, it signals McKercher Corporation’s intent to remain a stable, predictable, and standards-driven organisation. By prioritising operational maturity over rapid expansion, the corporation positions itself to deliver dependable outcomes for customers while supporting installers, manufacturers, and distributors with clear expectations and consistent execution. Operational objectives ›

Closing Message

December’s updates reflect a year defined by strategic discipline, technical clarity, and strong partnerships. As McKercher Corporation enters 2026, the focus remains on delivering reliable, compliant, and future-ready energy solutions while supporting the people and partners who make that possible.

Thank you to all teams and collaborators for your commitment throughout the year.

McKercher Corporation — Powering Progress, Sustaining Tomorrow.

Sigenergy Supports Australian Installers Through an Unprecedented Period

The Australian solar installation industry has recently experienced one of its most challenging periods in recent memory. The surge in demand generated by the Cheaper Home Batteries Program created significant momentum in the market, but it also placed substantial pressure on installers nationwide.

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Unprecedented order volumes, combined with global supply chain constraints, resulted in delays in product arrivals that disrupted installation schedules and strained operational capacity. Many installers had to manage customer expectations while dealing with circumstances beyond their control in the initial six months of Australia’s Cheaper Home Batteries Program and its now confirmed state of change.

At McKercher Corporation, we collaborate closely with both manufacturers and installers, and we have witnessed firsthand the impact this period has had on the industry in achieving forecast capacity while committing to increased resources.

Sigenergy’s 2026 Installer Rebate

In response to these challenges, Sigenergy has introduced a dedicated installer rebate program for Australia, running from January to April, designed to provide tangible financial support during this high-pressure period. The rebate applies to Sigenergy battery modules installed between January and April and is structured as follows:

$300 rebate per 8 kWh battery module

$200 rebate per 5 kWh battery module

This tiered structure acknowledges the various system sizes used in residential and commercial projects, ensuring that support aligns with real-world installation scenarios. Most approved Sigenergy installers are likely booked as this period approaches, making this manufacturer-backed rebate program a valuable benefit following recent, less-than-ideal market challenges.

Advertised promotion condition 17/12/2025: *This promotion is valid for qualified installers in Australia only. Credit notes are issued per eligible unit and are subject to verification of installation. Sigenergy reserves the right to amend, suspend, or terminate this offer at any time. In case of any discrepancy, the decision of Sigenergy shall be final.

Assistance for Delays and Operational Strain

For installers affected by product arrival delays during the rebate rush, this program provides meaningful assistance. The rebate helps offset additional costs associated with rescheduling, extended project management, and the operational strain caused by compressed installation timelines.

Rather than being a short-term promotion, this installer-focused rebate is a clear signal that Sigenergy understands the realities of the Australian market and is prepared to stand alongside its installation network during challenging conditions.

What This Means for Homeowners

The rebate is primarily aimed at installers, but homeowners benefit significantly from it as well. By providing financial support to installers during a challenging period, Sigenergy helps ensure consistent service, high-quality installations, and ongoing project progress. This assistance can alleviate the pressure on installers, enabling them to focus on delivering reliable outcomes and effective communication to their customers.

In most cases, approved Sigenergy installers are already committed to installations that have been pre-purchased at this unprecedented time of demand, making further cost reductions for the systems unlikely. This situation ultimately contributes to smoother project delivery and dependable local support, which is an essential consideration for homeowners investing in premium energy storage solutions.

Commitment to the Australian Market

Sigenergy’s 2026 installer rebate highlights their ongoing commitment to Australia and their installation partners. It acknowledges that having strong technology is not sufficient; successful outcomes require resilient partnerships with installers and proactive market support.

As the industry stabilises following the surge in the Cheaper Home Batteries Program and its recent changes [December 13 2025 announcement], continued collaboration between manufacturers, distributors, and installers will be essential. Programs like Sigenergy’s early 2026 installer rebate demonstrate how proactive support can strengthen the entire sustainable energy industry.

Prioritising Safety, Precision, and Preparedness

At McKercher Corporation, our commitment to operational excellence is rooted in a shared culture of safety, precision, and preparedness, both in the field and in the office. This month’s bulletin revisits three critical updates published on the company website during November. These updates underscore our collective responsibility to work safely, stay informed about product changes, and respond effectively in the event of an emergency.

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Key points

  • Mandatory PPE for Hammer Drills: All staff are required to adhere to the updated Hammer Drill Operation Procedures, which mandate the use of eye, ear, and hand protection. This ensures compliance with the Work Health and Safety Regulation 2022 and helps prevent onsite injuries.
  • Sigenergy SigenStor EC Update: A product change notice affects the SigenStor EC AC Output Interface, requiring design and installation teams to verify specifications before deployment.
  • Falls Rescue Plan Revision: The PSW-PLN-HSEQ-0X Falls Emergency Rescue Plan has been updated to include new rescue procedures and scheduled annual drills for all field teams.

Note: These bulletins are primarily intended for McKercher Corporation staff. Non-staff members may familiarise themselves with this open-source compilation of accessible business communication.

Updated Hammer Drill Operation Procedures

Working safely with power tools starts with proper preparation. The recently updated Hammer Drill Operation Procedures outline mandatory personal protective equipment (PPE) and revised safe work practices to ensure that every operator is protected from preventable injuries. These updates include reinforced requirements for eye, ear, and hand protection, along with clear instructions for pre-start inspections, secure footing, and appropriate material handling.

All staff, especially those in field operations, must familiarise themselves with the new procedures before using powered drilling equipment again. Supervisors are responsible for ensuring compliance during site briefings and toolbox meetings. These updates were posted on the company website earlier this month as part of our ongoing commitment to meet the Work Health and Safety Regulation 2022 requirements for risk elimination and control.

Remember: safe drilling begins well before the trigger is pulled. Taking the extra moment to check your PPE, inspect the tool, and confirm worksite stability helps protect you, your teammates, and our company’s safety record.

Product Update: Sigenergy SigenStor EC AC Output Interface

Sigenergy has issued a product change notice for the SigenStor EC AC Output Interface, applicable to both current and future installations. This update modifies the specifications for components related to the AC output interface, aiming to enhance system reliability and ensure compliance with Australian standards.

For technicians and project planners, it is important to verify product compatibility and updated connection requirements before proceeding with installations. All sales and design staff should refer to the revised datasheet and installation guidance available on the McKercher Corporation website and the PSW Energy resource portal.

Since the release of the product change notice, the Sigenergy Sigen Energy Controllers (8, 10, and 12 kW), installed by PSW, are now under a voluntary product recall. This recall, initiated by the manufacturer and monitored by the ACCC Product Safety department, focuses on enhancing safety and performance. This update underscores our commitment to staying informed about our partners’ product developments and maintaining our industry reputation for accuracy, compliance, and customer trust.

Revised Emergency Protocol: Falls Rescue Plan

Our ability to respond effectively to emergencies can save lives. The updated Falls Emergency Rescue Plan (PSW-PLN-HSEQ-0X) enhances our existing Emergency Management Plan (PSW-PLN-HSEQ-01) by providing clearer response procedures and role allocations for fall incidents. This new plan includes a detailed sequence of immediate rescue actions, coordination for medical response, and established communication pathways between field teams and emergency services.

A significant addition to the plan is the formal scheduling of annual fall-rescue drills, ensuring that each field team remains proficient in rescue procedures. Supervisors are now responsible for confirming that fall-arrest systems are being used, inspected, and properly documented according to schedule. Updated documentation and emergency contact listings have been integrated into the HSEQ system and should be reviewed by all staff involved in elevated work.

This update not only addresses audit recommendations but also demonstrates our ongoing commitment to ensuring the safety of everyone working at heights on McKercher Corporation projects. Update: Falls Emergency Rescue Plan (PSW-PLN-HSEQ-0X)

Closing Message

As we wrap up November, let’s remain committed to the standards that ensure our teams stay safe and our operations run smoothly. Whether it’s ensuring compliance with personal protective equipment (PPE), integrating product updates, or practicing rescue readiness, each of us plays a crucial role in fostering a culture of care and professionalism.

If you have any questions regarding these updates, please reach out to your department lead or the HSEQ team.

McKercher Corporation — Powering Progress, Sustaining Tomorrow.

Important Notice: Sigenergy Recall (8, 10, 12 kW) Single-Phase Controllers

Affected Sigen Energy Controller highlighted represented the affected component from the Sigenergy recall in Australia 2025

Sigenergy Technology Co., Ltd. has issued a voluntary recall of certain single-phase Energy Controllers (8 kW, 10 kW, 12 kW) and SigenStor EC inverters that were sold throughout Australia. This decision follows the product change notice issued in October 2025 and demonstrates Sigenergy’s commitment to working with the ACCC, Clean Energy Council, and Clean Energy Regulator to ensure the highest standards of safety and performance.

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What's Happening

Sigenergy has identified that some AC plugs on earlier single-phase inverter models may be susceptible to damage if installation procedures were not followed precisely.
Although the products themselves meet all design and safety standards, improper cable termination during installation can cause overheating at the AC connection under high load.

To address this, Sigenergy has:

  • Introduced a new, ferrule-free AC plug design,
  • Issued a firmware update adding real-time monitoring and automatic power adjustment under sustained load, and
  • Launched a nationwide replacement program for all affected units.

Are My Products Affected?

Models included in this voluntary recall:

  • SigenStor EC 8.0 SP / 10.0 SP / 12.0 SP
  • Sigen Hybrid 8.0 SP / 10.0 SP / 12.0 SP

No three-phase models are affected.
Units with the green-dot label on packaging already feature the updated AC plug and are not subject to recall.

What Customers Should Do?

  • Sigenergy system owners can continue using their Sigenergy system safely.
  • No action is required immediately — Sigenergy or your installer will contact you to arrange a free replacement.
  • Replacements include a 2-year warranty extension for added peace of mind.

If you’ve already received a firmware update notification, your system is operating under enhanced safety parameters until your replacement is scheduled.

For InstallerS

  • Do not install or recommission any affected single-phase units.
  • Register replacements through Sigenergy’s national service portal.
  • A $500 service subsidy applies to approved replacements.

Ongoing Commitment

McKercher Corporation subsidiaries and Sigenergy are working closely with Australian regulators to ensure all affected units are replaced promptly and transparently. The voluntary Sigenergy recall underscores our shared commitment to safety, quality, and customer trust.

Support & Contact

For questions or technical clarification, please contact: [email protected] or [email protected]

Alternatively, staff can contact PSW Energy’s support team, who can assist with detailed implications. For Western Australia, the affected stock regeneration and replacement process is expected to be resolved by Q1, 2026.

PSW Energy & Perth Solar Warehouse affected systems: What next ›

Update: Falls Emergency Rescue Plan (PSW-PLN-HSEQ-0X)

Department: HSEQ — Health, Safety, Environment & Quality
Document: FALLS EMERGENCY RESCUE PLAN — PSW-PLN-HSEQ-0X
Document (site copy): Falls_emergency_rescue_plan.docx (internal Drive)

This is an official notification to all technical staff regarding the Falls Emergency Rescue Plan (PSW-PLN-HSEQ-0X). The plan has been issued and updated, and it is now the company standard for responding to falls from heights.

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What this update is about

This is an official notification to all technical staff that the Falls Emergency Rescue Plan PSW-PLN-HSEQ-0X has been issued/updated and is now the company standard for responding to falls from height. The plan establishes the required procedures, responsibilities and equipment for safe rescue of personnel suspended in fall arrest systems, and must be used at every site where work at heights (>2 m) is undertaken.

Why this matters

The Plan sets mandatory controls to protect both the injured worker and rescue personnel — including pre-planning, site-specific rescue plans, competence requirements, and emergency response steps. Following the Plan reduces the risk of suspension trauma and other fall-related injuries, ensuring rescues are performed safely and in compliance with our HSEQ obligations.

Summary — purpose, scope & key procedures

Purpose & scope: Defines rescue requirements for falls of two (2) metres and above and requires inclusion of the Plan in risk assessments and SWMS for any applicable work.

Key procedures:

  • Rescue options include self-rescue, assisted self-rescue, mechanically aided rescue, aerial work platform/crane-assisted rescue, and team rescue; all must be pre-planned for the site conditions. 
  • Responsibilities for organisation, rescue personnel and supervisors, plus inspection, assembly and maintenance of rescue equipment. 

 

How it protects personnel: Pre-planning, competent trained rescuers, prescribed equipment, and rehearsal of emergency procedures minimise time suspended, control suspension-trauma risk, and protect rescue teams.

Key changes (please note)

  • New rope rescue procedures — The Plan now formalises rope-based rescue methods (including pre-rigged descent/control devices and vertical rescue/escape systems) as recognised rescue options and defines competency and pre-rigging requirements.
  • Updated equipment requirements — The equipment list has been revised to specify fibre/rescue rope, round slings, pre-rigged control descent devices, triple-lock karabiners, winches, rescue stretchers and other items that must meet relevant standards. Ensure all items meet manufacturer and inspection requirements.

Mandatory actions for technical staff

Attend mandatory training: All technical staff and nominated rescue personnel must attend the company rescue training on 8 December 2025 (attendance compulsory).

Update personal rescue kits: Review and update personal rescue kits to comply with the Plan’s revised equipment list prior to 8 December.

Review the Plan: Read PSW-PLN-HSEQ-0X in full and ensure site SWMS and rescue plans are updated before commencing any work at height.

Questions / Confirmation

For questions or to confirm training attendance and kit compliance, contact: HSEQ Department or Mark Rutherford — [email protected]

Issued by:
McKercher Corporation – Safety and Compliance Division

Updated Hammer Drill Operation Procedures – Mandatory PPE & Safe Work Practices

Effective Immediately – Compliance required across all McKercher Corporation sites.

McKercher Corporation has updated its Hammer Drill Operation Procedures to strengthen worker safety, eliminate preventable injuries, and ensure full compliance with AS/NZS safety standards. All team members operating hammer drills must follow these updated procedures and mandatory PPE requirements without exception.

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Why These Updates Matter

Using a hammer drill exposes workers to various hazards, including high-speed debris, excessive noise, and airborne dust, all of which can lead to serious injuries and long-term health problems. These updates aim to:

  • Eliminate preventable eye and hearing injuries.
  • Reduce respiratory risks from dust exposure.
  • Prevent hand and foot injuries caused by vibration and impact.
  • Address fatigue and ergonomic strain from extended tool use.

Your safety, and that of your team, depends on strict adherence to these standards.

Mandatory PPE Requirements

All workers using a hammer drill must wear the following Personal Protective Equipment (PPE). Each item is required for compliance with site and regulatory safety standards.

PPE Item
Purpose / Hazard Mitigated
Safety Glasses (AS/NZS 1337.1:2010)
Protects against high-velocity debris. Sunglasses are not an acceptable substitute.
Hearing Protection (Earplugs or Earmuffs)
Prevents hearing damage from prolonged exposure to high noise levels.
Dust Mask or Respirator
Protects against dust inhalation and respiratory irritation, especially in enclosed or dusty environments.
Gloves
Reduces vibration-related strain and protects hands from abrasion.
High-Visibility Clothing
Ensures visibility to surrounding workers and machinery operators.
Steel-Toe Boots
Protects feet from dropped tools, falling debris, and impact hazards.
Long-Sleeved Shirts and Trousers
Shields skin from dust, debris, and minor abrasions.

Why Sunglasses Are Not Sufficient

  • They do not provide impact resistance against flying debris.
  • They lack side shields, leaving eyes exposed.
  • They do not meet AS/NZS 1337.1:2010 standards for industrial eye protection.

Only certified safety glasses are permitted for hammer drill operations.

Safe Work Practices

Adhering to PPE requirements is only part of safe operation. Every worker must also follow these essential safe work practices:

  • Pre-Work Inspections

    • Inspect all tools and PPE for damage before use.

    • Verify that cords, plugs, and drill bits are intact and secure.

  • Work Area Safety

    • Maintain a clean, organized workspace free of tripping hazards.

    • Keep bystanders clear of the drilling zone.

  • Proper Tool Handling

    • Use the correct drill bit for the material.

    • Do not force the tool; let the hammer action perform the work.

    • Maintain a firm, balanced stance during operation.

  • Breaks & Ergonomics

    • Take regular breaks to minimize fatigue and vibration exposure.

    • Adjust grip and posture to reduce strain on wrists, shoulders, and back.

  • Dust and Ventilation Control

    • Use dust extraction systems or wet drilling where possible.

    • Ensure adequate ventilation when operating indoors.

Compliance Expectations

Effective immediately, all hammer drill operations must comply with the updated personal protective equipment (PPE) and procedural standards. Supervisors are responsible for ensuring compliance. Failure to follow these safety requirements may result in disciplinary action and could lead to removal from site duties.

Safety is Everyone’s Responsibility

Every preventable injury impacts our team’s safety record and the well-being of our people. These updates go beyond compliance; they focus on ensuring everyone returns home safely at the end of each shift.

Issued by:
McKercher Corporation – Safety and Compliance Division
Effective Date: November 2025

Sigenergy SigenStor EC, AC Output Interface Product Change Notice

October 2025, Sigenergy Technology Co., Ltd. has announced an update to the AC Output Interface for the SigenStor EC and Sigen Hybrid series. This change is designed to improve installation reliability and wiring safety, aligning with best practices for professional solar system deployment.

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Key Summary

To enhance long-term reliability and prevent overheating caused by potentially improper wiring connection methods formed between the installer and device, Sigenergy has upgraded the AC cable terminal across multiple SigenStor EC and Sigen Hybrid models. The product codes remain unchanged, ensuring continuity in ordering and inventory management.

Download

Models Affected

Single Phase (SP) – 8–12 kW

  • SigenStor EC 8.0 SP / 10.0 SP / 12.0 SP

  • Sigen Hybrid 8.0 SP / 10.0 SP / 12.0 SP

Three Phase (TP) – 17–30 kW

  • SigenStor EC 17.0 TP / 20.0 TP / 25.0 TP / 30.0 TP

  • Sigen Hybrid 17.0 TP / 20.0 TP / 25.0 TP / 30.0 TP

Implementation Dates:

  • AU Versions: October 2025

  • Global Versions: November 2025

Note: Refer to actual delivery timelines for confirmation.

Nature of the Change

Previous Configuration: Standard AC cable terminal that allowed flexibility in cable connection. Updated Configuration: Mandatory use of OT terminals for AC cable connections.

Reason for Change:

  • Addresses field cases involving undersized cables (e.g. 6mm²) and non-standard wiring methods.
  • Prevents potential connector overheating from improper terminations.
  • Improves overall connection security and installation consistency.

Technical Implications

  • No impact on product safety, ingress protection, maintenance, or reliability.

  • No change to external interfaces, dimensions, or product appearance beyond labeling updates.

  • New Identification: Packaging labels will include markings indicating the OT terminal version.

  • Product codes remain the same — no revision required in ordering systems.

Side‑by‑side diagrams comparing the previous and updated AC terminals for 8‑12 kW single‑phase Sigenergy inverters, highlighting the new OT terminal design.

Image: Product change location. Similar AC terminal location across all models identified.

Compatibility & Installation Guidance

For existing installations:

  • No retrofit or modification is required for units installed before the changeover.

For new installations (post-October/November 2025):

  • Installers must use OT terminals for all AC wiring connections.

  • Ensure proper cable sizing and crimping to maintain optimal current capacity and thermal performance.

  • Review the updated Quick Guide provided in the product package or contact McKercher Corporation for documentation support.

A cardboard box labeled “Sigenergy Inverter” with a close‑up showing the energy controller label and product details.

Image: Identification of change: Green Dot.

Actions for Installers

✅ Verify installation date to determine applicable terminal version.
✅ Use OT terminals for all post-change units.
✅ Update internal installation procedures to reflect the mandatory terminal usage.
✅ Reference the new product labelling during warehouse checks and job preparation.

Effective Dates

Region
Product Versions
Implementation
Australia
EC / Hybrid SP & TP Models
October 2025
Global
EC / Hybrid SP & TP Models
November 2025

Support & Contact

For questions or technical clarification, please contact: [email protected] or [email protected]

Alternatively, staff can contact PSW Energy’s technical team, who can assist with documentation or compatibility inquiries.

Commitment to Installers

At McKercher Corporation, we recognise that clear communication around product changes is essential to your success in the field. This update reflects Sigenergy’s and McKercher Corporation’s shared commitment to installation quality, safety, and transparency—ensuring every system you install performs reliably for years to come.

Download: SigenStor EC / Sigen Hybrid AC Output Interface Product Change Notice (PCN2025018)

Related: Sigenergy voluntary product recall for selected Energy Controllers in Australia

Strengthening Compliance, Partnerships, and Industry Standing

Compliance and excellence are closely linked. As McKercher Corporation continues to evolve within the renewable energy sector, we remain committed to ensuring that every project, partnership, and accreditation meets our shared standards for quality, safety, and performance. This month’s bulletin highlights three key updates that are shaping our operations and partnerships.

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Key points

  • When integrating Battery Energy Storage Systems (BESS) with existing PV arrays, staff must distinguish between repairs (no new compliance needed) and alterations (full compliance reassessment required) under AS/NZS standards.
  • PSW Energy’s Q3 success—marked by 15% installation growth and record customer satisfaction—demonstrates the strength of McKercher Corporation’s renewable partnerships and reinforces its market leadership.
  • PSW Energy, Perth Solar Warehouse has achieved Sigenergy Silver Certified Installer status, affirming the company’s commitment to technical excellence, compliance, and industry best practice.

Note: These bulletins are primarily intended for McKercher Corporation staff. Non-staff members may familiarise themselves with this open-source compilation of accessible business communication.

Regulatory Changes: PV Arrays & BESS Compliance

Regulatory frameworks continue to evolve as battery technology becomes increasingly integrated into existing solar systems. One critical update affects how existing PV arrays are classified under compliance rules when paired with Battery Energy Storage Systems (BESS).

Repairs vs Alterations: The Key Distinction. When adding or modifying a BESS to an existing PV system, it’s vital to understand whether the work qualifies as a repair or an alteration:

Repairs: Activities that restore a system to its original operating condition—such as replacing identical components or fixing faults—do not require new compliance certification under AS/NZS standards.

Alterations: Any modification that changes the configuration, capacity, or function of an existing system—such as upgrading inverters, adding storage, or reconfiguring circuits—requires a full compliance reassessment to ensure the installation meets current standards.

Why It Matters: Understanding this distinction protects both the company and individual technicians from compliance breaches. This ensures:

  • Continued alignment with the Clean Energy Regulator and AS/NZS standards.
  • Assurance that McKercher Corporation installations remain legally compliant and safe.
  • Confidence that clients receive systems built to the latest and highest quality benchmarks.

Understanding regulatory definitions is crucial for our operational integrity as the renewable energy landscape evolves. Deeper understanding: Regulatory Update: Compliance Requirements for Battery Energy Storage System (BESS) Installations with Existing PV Arrays

Subsidiary Strength: PSW Energy’s Q3 Results

PSW Energy continues to achieve remarkable results. The Q3 performance report highlights a significant increase across key metrics—sales growth, installation efficiency, and customer satisfaction—demonstrating the strength of McKercher Corporation’s renewable energy network.

Highlights from Q3, 2025

Improved growth in residential solar and battery installations compared to the previous quarter.

Record customer satisfaction levels of purchasing customers, reinforcing trust in PSW Energy as a subsidiary of McKercher Corporation.

Improved package/project streamlining through the adoption of agentic handling systems.

These achievements highlight the importance of aligned partnerships and a shared commitment to advancing renewable solutions that are effective, compliant, and sustainable. PSW Energy’s ongoing success reflects McKercher Corporation’s broader strategic goal of leading with integrity, reliability, and innovation in Australia’s renewable energy market. For further insights, see: PSW Energy Strengthens McKercher Corporation’s Renewable Portfolio with Q3 Results

Achievement Unlocked: Sigenergy Silver Certification

Congratulations to the PSW Energy and Perth Solar Warehouse team for achieving Sigenergy Silver Certified Installer status. This certification recognises exceptional proficiency in deploying Sigenergy’s advanced energy storage technologies and maintaining manufacturer-aligned best practices. What this means:

PSW Energy, Perth Solar Warehouse is officially recognised by Sigenergy as a trusted and technically competent partner.

This status enables the business to provide improved product support, system optimisation, and increased client confidence.

It reflects McKercher Corporation’s broader commitment to professional excellence and continuous improvement in renewable technology deployment.

This certification is not only an important operational achievement, but also a reflection of our commitment to quality, compliance, and innovation. Every team member should feel proud to be part of a company that continues to set benchmarks in the Australian renewable energy industry. Further learning: Perth Solar Warehouse attains Sigenergy silver certified installer status

Closing Message

Our progress is a collective effort. Each compliance update recognised, every partnership strengthened, and each certification obtained signifies a shared step toward a cleaner, safer, and more resilient energy future.

If you have any questions or need further clarification regarding these updates, please contact your department lead or the compliance team.

McKercher Corporation — Powering Progress, Sustaining Tomorrow.

PSW Energy Strengthens McKercher Corporation’s Renewable Portfolio with Q3 results

PSW Energy’s performance in Q3 2025 highlights the McKercher Corporation’s growing leadership in Australia’s renewable energy sector.

As McKercher Corporation reviews its 2025 performance across business divisions, one of the year’s standout results comes from PSW Energy, the group’s flagship renewable energy company based in Western Australia. According to SolarNerds.com.au’s latest quarterly industry rankings, PSW Energy has secured a Top 5 position in solar PV installations and an exceptional 2nd place in energy storage capacity across the state for Q3 2025 — reaffirming the company’s role as a key contributor to the region’s renewable transformation.

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At a Glance

  • Solar PV Installed: 5,019 kW

  • Solar PV Ranking: 4th overall in Western Australia

  • Energy Storage Installed: 4,608 kWh

  • Energy Storage Ranking: 2nd overall in Western Australia

These figures, independently verified by SolarNerds.com.au, provide a data-driven view of PSW Energy’s growth trajectory. The results reflect not only strong consumer confidence but also the company’s ability to scale effectively in one of Australia’s most dynamic energy markets.

Key Points

  • PSW Energy, which includes Perth Solar Warehouse, ranked 4th in solar PV installations with a capacity of 5,019 kW and 2nd in energy storage capacity at 4,608 kWh across Western Australia in Q3 2025, according to SolarNerds.com.au. This achievement solidifies its position as one of the state’s most trusted and capable renewable energy providers.
  • The nearly equal levels of PSW Energy’s installed solar generation and battery storage highlight the accelerating transition toward integrated energy systems. This positions the business—and McKercher Corporation—at the forefront of Western Australia’s journey toward energy self-sufficiency.
  • PSW Energy’s 2025 results underscore McKercher Corporation’s comprehensive sustainability strategy, significantly contributing to the group’s renewable energy portfolio and its long-term investment focus on scalable, low-carbon technologies.

A Year of Transition and Growth

The 2025 third quarter reporting period marks a pivotal phase for McKercher Corporation’s energy and sustainability investments. Western Australia continues to lead the nation in residential solar adoption, and PSW Energy’s consistent performance throughout the year demonstrates its ability to compete — and excel — in an increasingly sophisticated market.

While solar PV installation remains a cornerstone of the business, the surge in energy storage deployments is a key strategic highlight. By ranking 2nd statewide in installed battery capacity, PSW Energy reflects a shift in consumer priorities — toward energy independence, grid stability, and sustainable electrification.

Results

SolarNerds.com.au uses source data derived from the Clean Energy Regulator’s (CER) Renewable Energy Certificate (REC) registry. Q3, 2025, interval data, Western Australia displayed.

The Broader Renewable Energy Landscape

Across Australia, the renewable energy transition is accelerating, and Western Australia stands at the forefront of distributed solar generation. Consumers are increasingly combining solar generation with battery storage, reshaping how homes and businesses interact with the grid.

PSW Energy’s 2025 results mirror this national trend. The company’s near-equal balance between solar generation (5,019 kW) and storage capacity (4,608 kWh) underscores how solar and battery systems are converging into an integrated model for sustainable energy use.

This performance not only strengthens PSW Energy’s position within the market but also reinforces McKercher Corporation’s broader commitment to low-carbon growth, technology-led innovation, and community energy resilience.

Strategic Outlook for 2026 and Beyond

As McKercher Corporation enters the next financial year, the momentum from PSW Energy’s 2025 performance provides a strong foundation for continued investment in renewable energy technologies.

The company’s ability to deliver large-scale installation capacity while maintaining operational excellence positions it as a cornerstone of McKercher’s clean energy strategy — a strategy focused on enabling sustainable growth across residential, commercial, and industrial sectors in Western Australia and beyond.

With energy systems evolving and consumer expectations shifting toward autonomy and sustainability, PSW Energy’s role within McKercher Corporation is both operational and symbolic — representing a commitment to a cleaner, more resilient energy future for all Australians.

References

SolarNerds.com.au: Volume Leaderboards, WA

PSW Energy: Recognition of interval data

Regulatory Update: Compliance Requirements for Battery Energy Storage System (BESS) Installations with Existing PV Arrays

The Department of Local Government, Industry Regulation and Safety has released updated guidance clarifying compliance responsibilities when installing Battery Energy Storage Systems (BESS) alongside existing photovoltaic (PV) arrays. This update outlines how contractors must distinguish between a repair and an alteration, ensuring each system meets applicable safety standards under AS/NZS 3000:2018 and AS/NZS 5033:2021.

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Overview

The Department of Local Government, Industry Regulation and Safety has clarified compliance obligations for installing Battery Energy Storage Systems (BESS) with existing photovoltaic (PV) arrays, emphasising the distinction between repairs and alterations under AS/NZS 3000:2018 and AS/NZS 5033:2021. Repairs must meet the standards applicable at the time of the original installation, while alterations—such as adding a BESS—must comply with current standards. Electrical contractors are responsible for verifying the safety of existing PV systems before integration, including checks on wiring, earthing, and isolation equipment. Systems installed before 2015 may require upgrades to meet present requirements.

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Key Points

  • Repairs vs. Alterations: Adding a Battery Energy Storage System (BESS) to an existing PV array is considered an alteration, not a repair — meaning the entire installation must comply with current standards AS/NZS 3000:2018 and AS/NZS 5033:2021, rather than the standards in place at the time of the original install.

  • Safety Verification Required: Before connecting a BESS, electrical contractors must perform a thorough safety verification of the existing PV system, checking wiring, earthing, and isolation to confirm compliance and safe operation.

  • Older Systems May Need Upgrades: PV arrays installed before 2015 may require significant upgrades to meet modern safety and disconnection requirements, while post-2015 systems generally align more closely but must still be verified before integration.

Repairs vs. Alterations: Understanding the Difference

A repair involves restoring an existing system to its original operational state. In this case, the work must comply with the standards that applied at the time of the original installation. By contrast, an alteration—such as adding a BESS or reconfiguring a PV system—constitutes a modification of the existing installation. Alterations must comply fully with current standards, ensuring the system meets today’s safety and performance requirements.

Safety Verification and Compliance Obligations

Before connecting any BESS to an existing PV array, electrical contractors are required to verify the ongoing safety and compliance of the PV system. This includes inspection of wiring integrity, earthing arrangements, and isolation equipment. Systems installed before 2015 may need additional upgrades, as earlier standards did not require certain earthing and disconnection measures now mandated by AS/NZS 5033:2021. Post-2015 systems, while generally closer to compliance, must still undergo full verification to confirm safe integration.

Our Commitment to Compliance and Safety

At Perth Solar Warehouse, we are committed to meeting all regulatory obligations and maintaining the highest standards of electrical safety. Our installation teams follow rigorous compliance verification procedures, ensuring every BESS integration aligns with both regulatory requirements and best-practice electrical safety.

By adhering to these standards, we protect our customers, our workforce, and the long-term integrity of every renewable energy system we deliver.