Modular Solar 475W Unit vs Thunder Bolt 920W
A side-by-side look at the Modular Solar 475W Unit and Thunder Bolt 920W. Winning figures are highlighted.
| Modular Solar Technologies Modular Solar 475W Unit | Thunder Energy Thunder Bolt 920W | |
|---|---|---|
| Price from | £650 | £749.99 |
| Panel capacity | 475 Wp | 920 Wp |
| Panels | 1 | 2 |
| Max AC output | 475 W | 800 W |
| Microinverter | n/a | Hoymiles HMS-800-2WB |
| Mounting | n/a | Garden or flat roof |
| Bifacial panels | n/a | No |
| Cable length | n/a | n/a |
| Warranty | 10 yrs | 10 yrs |
| ENA register reference | MODUL/21169/V1/A1 | THUNE/21204/V1 |
Best value per row highlighted. Prices last checked 15 October 2026.
Modular Solar 475W Unit
The larger of Modular Solar's two free-standing units: 475W of AC output against the 340W unit's 340W, in a heavier housing built from British-grown timber rather than recycled plastic. Like the 340W unit, its output sits well under the 800W legal cap.
Full Modular Solar 475W Unit reviewThunder Bolt 920W
The sensible middle of the register-listed range: enough panel capacity to make real use of the 800W cap, and two independent MPPTs so one shaded panel doesn't drag the other down. Bracket sets included for a garden or flat roof, shed, outbuilding or rear extension roof.
Full Thunder Bolt 920W review