Thunder Bolt 920W kit
Two-panel Bolt. Thunder can also install it for you in England.
Price£749.99
RetailerThunder Energy
Panels2 × (920W total)
Inverter output800W
MountingGround, Flat roof
ENA registerListed (retailer)
See it at Thunder Energy Price checked 2026-11-14
What it would save
Estimated for a home in the middle of England with someone in for part of the day, at 26.32p/kWh. Use the calculator for your postcode.
| Where it goes | Made per year | Saving | Payback |
|---|---|---|---|
| Garden (ground frame), facing south | 871 kWh | £129 | 5.8 yrs |
| Balcony railing, facing south (mount not in kit) | 737 kWh | £118 | 6.3 yrs |
| House wall, facing south (mount not in kit) | 639 kWh | £109 | 6.9 yrs |
| House wall, facing east (mount not in kit) | 447 kWh | £84 | 8.9 yrs |
| Garden (ground frame), facing west | 681 kWh | £110 | 6.8 yrs |
| Flat roof, facing south | 788 kWh | £120 | 6.3 yrs |
The panels add up to 920W but the inverter caps output at 800W. That's normal and legal: on most UK days the panels make well under their rating, so a bit of extra panel keeps output up.
Cheaper or similar kits
DMEGC 950W Hoymiles HiFlow kit£456 at City PlumbingJA Solar 800W balcony & garden kit (2 × 465W)£470.95 at Voltacon SolarDMEGC 1050W Hoymiles HiFlow kit£480 at City Plumbing
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