According to the latest report of EUPD Research in Germany, a 7 kW photovoltaic system connected to a 7 kWh household battery can provide 80% of the electricity required for an electric vehicle with an average annual mileage of 14,000 kilometers.

According to the market research company, this is equivalent to an annual electricity consumption of 2500 kWh. The company stated that the use of a 6 kW photovoltaic array combined with a 6 kWh battery can also provide the same proportion of electricity for an electric car with an annual mileage of 5000 kilometers and a power demand of 900 kWh, and calculates the frequent travel, electricity A vehicle requiring 5000 kWh requires a 12 kW system with energy storage capacity.

(Image source: pv-magazine)

Even without energy storage, electric vehicle drivers can use a large portion of solar energy. For example, a 7 kW system without a battery can meet 39% of a car's electricity demand through solar power generation.

EUPD Research also said that solar + energy storage solutions can greatly reduce charging costs. It believes that a set of 10 kW system with energy storage can save up to 52% of charging costs. This is equivalent to saving 415 euros per year.

Martin Ammon, managing director of EUPD Research, said: "In order to store spontaneous solar power for use in electric vehicles, household energy storage systems are essential, especially in winter."