- The product specification
- Plug-in Solar Device Interim Product Specification, Version 2.0, July 2026, DESNZ. An earlier Version 1.0 is stamped withdrawn and still circulates.
- Costs and the notification process
- DESNZ final stage impact assessment. Note its price figure is a European market figure, not a UK shelf price.
- The wiring regulations
- BS 7671:2018+A4:2026, published 15 April 2026 by the IET and BSI. It is a paid standard, so we reference it rather than quote it.
If we cannot source something, we say so on the page rather than fill the gap. There are things about this product nobody can yet answer, and Northern Ireland is the largest of them.