Is a garage roof big enough for solar?

A single garage: 12-15m² (fits 4-6 panels). A double garage: 25-30m² (fits 8-12 panels). Even a single garage provides a meaningful contribution.

Does the garage conversion need planning permission?

The conversion itself may or may not need planning (check with your council). Solar panels on the garage are usually permitted development unless listed or in a conservation area.

Can I combine garage solar with an EV charger?

Perfect combination — solar on the garage roof + EV charger inside the garage = free driving. A Zappi charger in the garage with panels above is the ideal setup.

Solar and Garage Conversions

By Home Solar Guide Team|Updated 20 March 2026|guide

Independently written | Plain-English guide

Solar garage conversion — Converting your garage? Add solar to the roof — offset the extra electricity demand.

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Should I add solar during a garage conversion?

Solar panels and garage conversions: a converted garage adds 500-1,500 kWh/yr in electricity demand (heating, lighting, appliances). Install solar on the garage roof DURING the conversion to offset this increase. OPTIONS: (1) PANELS ON GARAGE ROOF — if the garage roof faces south/east/west. Typical: 4-6 panels (1.6-2.4kW). Cost: £2,500-£4,000 (cheaper during build — scaffolding already up). (2) EXTEND MAIN HOUSE SYSTEM — add panels to the main roof instead. (3) SHARED SYSTEM — garage and house share one inverter (most common). KEY: brief your builder and electrician about solar plans BEFORE the conversion starts. Running conduit during build is much cheaper than retrofitting.