What temperature should I wash at for solar?

30°C — uses 0.5kWh vs 2kWh at 60°C. Modern detergents work perfectly at 30°C. Save the 60°C for towels and bedding, and run those during peak solar.

Should I run the tumble dryer on solar too?

Tumble dryers use 2-5kWh per cycle — much more than washing machines. On a sunny day your solar may cover it, but a washing line is free! In winter, a heat pump dryer (1-2kWh) is the most solar-friendly option.

How do I time my washing machine with solar?

Use the delay start function on your machine. Set it to start at 11am when solar peaks. Or use a smart plug (£10-£15) controlled by your solar monitoring app.

Does a dishwasher work the same way?

Yes — a dishwasher uses 1-1.5kWh per cycle. Run it midday on the eco setting for free solar-powered dishwashing.

Solar Powered Washing Machine

By Home Solar Guide Team|Updated 18 March 2026|guide

Independently written | Evidence-based | Sources cited

Solar washing machine — Run your washing machine on solar — 0.5-2kWh per cycle is easily covered by daytime solar.

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Can I run my washing machine on solar?

A washing machine is one of the easiest appliances to run on solar power. Energy per cycle: 0.5-2kWh (depending on temperature). A 4kW solar system generates 2-4kWh during peak midday hours. So: run your wash between 10am-2pm and it is powered almost entirely by solar. Cost per cycle on grid: 12-49p. Cost on solar: FREE. Annual saving (5 washes/week): £30-£60/yr. Smart approach: use a timer delay to start mid-morning, or a smart plug connected to your solar monitoring app. Wash at 30°C when possible — uses 0.5kWh (half the energy of 60°C).