Manufacturer
Thunder Energy plug-in solar
Thunder Energy is a UK brand selling plug-in solar kits direct. Six of its kits are listed as compliant on the ENA Type Test Register, and it quotes the register references on its own site — which is rarer than it should be.
6 plug-in solar kits from Thunder Energy listed as compliant on the ENA register
When we last checked the register, on 16 October 2026, it listed 6 plug-in solar kits from Thunder Energy as compliant. Only those exact models are covered. See the kits the register lists as compliant.
What the register lists
We read the ENA Type Test Register ourselves on 10 October 2026. It held six Thunder Energy entries, all marked Compliant, all at 0.8 kW and all recorded as meeting G98. Every one is a Bolt model:
| Reference | Model string on the register |
|---|---|
| THUNE/21203/V1 | Thunder Bolt 460W |
| THUNE/21748/V1/A1 | Thunder Bolt 460W (Flat Roof) |
| THUNE/21204/V1 | Thunder Bolt 920W |
| THUNE/21749/V1/A1 | Thunder Bolt 920W (Flat Roof) |
| THUNE/21750/V1/A1 | Thunder Bolt Max 530W |
| THUNE/21751/V1/A1 | Thunder Bolt Max 530W (Flat Roof) |
Four of those six only became Compliant on 7 October 2026, having been added two days earlier as Non-compliant — see our note on that change. The register distinguishes a flat-roof variant from the standard kit at the same wattage, so the mount is part of what is listed.
Thunder Energy quotes these references on its own site, which few sellers do. When we read it on 10 October its header read “ENA-listed plug-in solar · Bolt 460W & 920W” with the references alongside, and its comparison table carried a “ENA register” row. That is the behaviour we would like to see everywhere.
What it sells, and the three things to separate
Reading Thunder Energy’s own shop on 10 October 2026, its range divides into three kinds of thing, and only the first is covered by the entries above.
- Bolt kits — on the register. Rigid-panel kits for gardens, sheds and flat roofs. When we read prices on 7 October the Bolt 460W was £549.99 and the Bolt 920W £749.99, both badged “ENA Compliant”. These names match register entries.
- Storm kits — not on the register under that name. Flexible-panel kits for balconies, walls and façades, £499.99 and £699.99 when we read them on 7 October. We found no register entry containing the word “Storm” on 7 or 10 October. That does not make them unusable; it means we cannot point to an entry, so ask Thunder Energy which reference covers the exact kit.
- “Plus” bundles — a kit plus a battery. These pair a Bolt or Storm kit with Thunder’s 1.92 kWh “Vault” battery, £1,499.99 to £1,749.99 on 7 October. In Thunder’s own words the Vault is “a separate plug-in battery that pairs with any Thunder kit”, sold alongside the solar kit rather than as part of it — which is the right way round, because battery storage is outside the plug-in solar route entirely. See plug-in solar with battery storage.
It also offers installation across Greater London, handling “the socket or hardwired connection, the DNO paperwork and a tidy finish”, and repeats the RCD advice we cover in RCDs and DC leakage: if you have a Type AC RCD, ask an electrician before plugging in.
We have not tested any of these kits. Prices and badges are what we read on the dates given; check the seller.
Manufacturer documentation
Range names, prices, badges, the Vault description and the installation and RCD notes above come from Thunder Energy’s own site, read on 7 and 10 October 2026. Compliance status comes from our own reading of the ENA Type Test Register on 10 October 2026.
Related guides
Where these kits sit in the wider picture:
- Kits on the ENA register — every kit the register marks Compliant, with its reference and our check date.
- Where to buy plug-in solar kits — the retailers and suppliers we have read, and how each kit maps to the register.
- How to register a plug-in solar kit — the notification you must make after buying.
- Is plug-in solar legal in the UK? — the current legal position.