Key takeaways
- • Plug-in solar in Great Britain is limited to a maximum output of 800W.
- • Savings depend heavily on how much electricity you use during daylight hours.
- • Permission may be required if you rent, lease or live in a managed building.
Compliance is the difference between a system your network operator accepts and one that creates problems at sale, insurance or inspection time.
The four documents to ask for
1. G98 compliance certificate for the microinverter 2. UKCA or CE declaration of conformity 3. Panel datasheet with IEC 61215 and IEC 61730 certification 4. Installation manual specifying an approved connection method
If a seller cannot produce these, treat the kit as unverified.
Inverter output matters more than panel wattage
Rules are written around what the inverter feeds into the grid. Panels rated above the inverter output are normal and fine — the inverter clips the peak. What matters is that the inverter output is within the limit and certified.
Connection method
Look for a kit designed for a fixed connection point rather than a household plug. Manuals that show a standard 13A plug feeding the grid are a red flag for the UK market.
Mounting and structural safety
Balcony and wall mounts must be rated for wind loading. Check the fixing specification against your building type and height, and ask a structural professional if you are above the second floor.
Our compliance labels
We mark each product as verified, self-declared or not verified, record the source used and the date checked. Verified means we have seen documentation from the manufacturer or a named retailer.
Frequently asked questions
Sources
Fact-check status: reviewed. Read our editorial policy. General information only — not electrical, legal or financial advice.