Step 2 of 6

Choose your solar panels

Select the panels for your install. Once you choose, we calculate how many you need and carry that count forward to size your inverter.

What to look for

For a DIY install, prioritise panels with the highest wattage per panel that fits your roof — fewer panels means less mounting hardware and wiring. TOPCon panels (400W+) are now cost-competitive with PERC and are the better choice for most 2026 installs. Check physical dimensions against your available roof space before ordering: most 400–420W panels are around 1755 mm × 1050 mm.

Jinko, Trina, Canadian Solar, and JA Solar panels are widely stocked at UK solar wholesalers (Segen, BEW, Greenstar) and typically arrive within 2–5 working days.

Complete Step 1 first to see how many panels you need. You can still select a panel now.

Compare panels on SmartSolarHomes

Our solar panel comparison covers the top UK DIY-friendly panels on efficiency, warranty, and price.

Step 2 of 6

Assess your energy usage Your plan Choose your inverter