The rules for plug-in solar in the UK, explained in full, with every source.
The regulations, the product specification, the connection rules and the planning position in each nation, each one taken from its primary source and dated. Nothing here is a vendor's summary.
1.1What this reference covers
This reference covers plug-in solar photovoltaic devices. These connect to a domestic low voltage installation through a standard socket outlet, and operate in parallel with the distributor's network.
It does not cover conventional roof-mounted PV under BS 7671 Section 712, building-integrated PV, plug-in battery systems, plug-in solar combined with batteries, or plug-in generation from anything other than solar. None of those are covered here.
1.2The position in brief
| Question | Answer | From |
|---|---|---|
| Is it legal | In Great Britain, yes, from 27 August 2026 | SI 2026/848 |
| Maximum output | 800 W rated AC output, 800 VA apparent power | SI and specification |
| How many | One per household | G98 Issue 2 Amd 1 |
| Who may install | An ordinary person, with limits | Specification |
| Must anyone be told | The network operator, within 28 days | DESNZ impact assessment |
| Northern Ireland | Unresolved | Specification footnote |
1.3How to read the numbers
The statutory instrument sets a maximum rated alternating current output of 800 watts. The product specification sets a maximum apparent power of 800 VA. These are not the same quantity and this site does not treat them as interchangeable. Where a figure matters, the clause names which document it came from.
Version 1.0, June 2026, is stamped Withdrawn on every page and still circulates. Only Version 2.0, July 2026, is current. If a document you are reading does not say Version 2.0, check it.