If you drive an electric vehicle, pairing it with a home solar system creates one of the most financially compelling energy setups available today. Here is why the numbers are so dramatic.
The Cost of Charging Without Solar
Charging an EV from the grid at the average UK electricity rate of 24.5p/kWh costs approximately £620 per year for an average driver covering 10,000 miles. That is already 74% cheaper than petrol, which would cost around £2,400 for the same distance.
Adding Solar to the Mix
When you charge your EV from your own solar panels, the electricity is effectively free. A well-sized solar system generating during the day can fill your car battery while you are at work, or a home battery can store solar energy for overnight charging.
The result? Your annual charging cost drops from £620 to approximately £120 (to cover the odd grid top-up during winter or long journeys). That is a 95% reduction compared to petrol.
Smart Charger Integration
Modern smart chargers like the Zappi, Ohme, and Tesla Wall Connector can be programmed to prioritise solar energy. The Zappi, for example, has a dedicated eco mode that only draws power from your solar panels, pausing charging when cloud cover reduces generation.
The Full Picture
A typical household with a 12-panel solar system, battery storage, and EV charger can save over £3,000 per year compared to buying grid electricity and petrol. With finance from £89/month, the system pays for itself many times over across its 25+ year lifespan.
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