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.
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.
Models Affected
Single Phase (SP) – 8–12 kW
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SigenStor EC 8.0 SP / 10.0 SP / 12.0 SP
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Sigen Hybrid 8.0 SP / 10.0 SP / 12.0 SP
Three Phase (TP) – 17–30 kW
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SigenStor EC 17.0 TP / 20.0 TP / 25.0 TP / 30.0 TP
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Sigen Hybrid 17.0 TP / 20.0 TP / 25.0 TP / 30.0 TP
Implementation Dates:
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AU Versions: October 2025
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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
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No impact on product safety, ingress protection, maintenance, or reliability.
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No change to external interfaces, dimensions, or product appearance beyond labeling updates.
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New Identification: Packaging labels will include markings indicating the OT terminal version.
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Product codes remain the same — no revision required in ordering systems.
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.
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.
