Thunder Energy · plug-in solar kit
Thunder Energy Bolt 920W
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A plug-in solar kit with 920 W of panels and an 800 W . Tilted south, it could save about £121 a year.
Our spec score 7.2/10 · how we score
From £749.99 In stock
Check price at Thunder EnergyPlain link: we don't earn anything if you buy from this seller.
Is it right for me?
| Saving | About £121 a year tilted south with little shade (government figures); your own figure |
|---|---|
| Payback | About 6.2 years at today's price |
| Over 15 years | About £1,065 saved after paying for the kit, before any electrician costs; panels are usually warranted 20 to 25 years and the small inverter 10 to 12 |
| On the ENA register | Yes, so it can plug into a normal socket if your socket circuit has (or RCBO) protection; older fuse boxes need an electrician's check |
| Where it goes | Mounting system included; flat-roof sets extra |
| Fitting | Panels and bracket to assemble; a wall or roof fixing is a job for a professional |
What it could save
For the 920 W (2 × 460 W), 5 m cable version at £749.99, with little shade and someone home in the day:
| Where the panels go | Made a year | Saving a year | Payback |
|---|---|---|---|
| South-facing, tilted | 741 | £121 | 6.2 years |
| South-facing wall or balcony | 534 kWh | £101 | 7.4 years |
| East or west wall | 408 kWh | £77 | 9.7 years |
Government (DESNZ) yield and self-use figures for the south-tilted and east/west wall rows; the south wall row is our estimate. 26.32p a kWh (Ofgem price cap). Try your own home.
: Listed as Compliant (reference THUNE/21204/V1, listed 2026). Source: thunderenergy.co.uk product page and plugsolarhub.co.uk register summary.
Not electrical advice. We compare products; we are not electricians. Before you connect a solar kit to your home, ask a qualified electrician to check the socket, the circuit and your , and follow the maker's instructions.
Note: Free UK delivery. Thunder Energy has no affiliate programme yet, so we cannot link to it; we have asked.
Why it's worth a look
- Could take about £121 a year off your bill (south-tilted, someone home in the day): in about 6 years at today's prices.
- Confirmed on the ENA Type Test Register, so it can be plugged in under the UK rules.
- No roof work and no installer for the kit itself; take it with you when you move.
Watch out for
- Output is capped at 800 W by the rules, so panel watts above that add less than you might expect.
- You must tell your network operator () after plugging it in.
Reliability signals
- Repairs: through the maker's UK support; we list known issues only from named reviews, and none are recorded yet
Owned one? Tell other buyers how it has held up.
Where it ranks in our lists
- #2 in Best plug-in solar kits
Full specifications
| Versions | 920 W (2 × 460 W), 5 m cable: £749.99 920 W (2 × 460 W), 10 m cable: £789.98 |
|---|---|
| Inverter output | 800 W |
| Inverter | 800 VA dual-input |
| Mounting | Mounting system included; flat-roof sets extra |
| Plug | UK 3-pin (BS 1363) |
| Warranty | not published |
| Monitoring | not published |
Sources (1)
Where to buy and every version
| Seller | Price | Check price |
|---|---|---|
| Thunder Energy | £749.99 | Check priceWe don't earn from this seller |
Versions
| 920 W (2 × 460 W), 5 m cable | £749.99 | In stock |
| 920 W (2 × 460 W), 10 m cable | £789.98 | In stock |
Also sold as (2 bundles and options)
| Seller's version | Price | Stock |
|---|---|---|
| 5m / 2× Flat Roof Mounting Sets | £819.97 | In stock |
| 10m / 2× Flat Roof Mounting Sets | £859.96 | In stock |
Price from the seller's own UK page. Prices change; the seller's page is always right.
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More: all plug-in solar kits · Thunder Energy · owner reports