WEBASTO - Feel the Drive
  • House with solar panels; electric car is refuelled at the wallbox with self-generated electricity.

    Total Freedom: Solar Energy For Electric Cars

    Wouldn’t it be great if you could simply generate the power for your electric car yourself?

    Homeowners can make this dream come true with solar panels. When the sun smiles, your wallet will as well.

    We explain how it works.

  • Don’t Sell It! Store Electricity And Use It Yourself

    A few years ago, selling your own solar power by feeding it into the public grid was still worthwhile. Today, storing that power and using it in your own home, for example for the washing machine, cooker, lights, TV and even your electric car or heat pump, is more profitable. This way, you will save on expensive electricity from the grid and reduce your environmental impact. And besides, being independent and self-sufficient is a great feeling.

    Now is an excellent time to look into purchasing your own solar panels, as their prices have fallen dramatically over the past few years. If you can generate your own power, it will pay off: A kilowatt hour of solar power costs around €0,08. By contrast, a kilowatt hour of electricity from the public grid costs around €0,30 there.

     

    Electric vehicle under a solar carport generating “its own” electricity for charging. Why pay for something you can generate yourself?
  • Refuelling With Your Own Solar Power: A Sample Calculation and How It Works

    Woman with shopping, car in the background being charged with electricity generated by the home photovoltaic system. Solar panels on the roof for bargain-basement energy costs.

    Here’s a sample calculation: A popular photovoltaic system size for the average household is eight kilowatt peaks. This system will supply around 8,000 kilowatt hours (kWh) a year in Germany. On a sunny day, this system would generate around 40 kWh of electricity. A compact electric car consumes around 15 kWh of electricity per 100 km.

    In other words, on a sunny day, an 8 kWp photovoltaic system generates enough power for a 260 km drive in the electric car. If you charge the vehicle via the grid, this 260 km range would cost around €12 in Germany. By contrast, if you charge it with your self-generated solar power, the costs would be max. €4.

    And this is how it works: When your household appliances are supplied with solar energy and your solar battery is full, there is a surplus of generated electricity. This energy is not fed into the grid – it flows to the wallbox in your garage or carport. For this process, the charging station constantly monitors the electricity generated by the solar panels and your household consumption. The electric car is only charged if there is definitely a set amount of surplus power available. If the surplus electricity falls below the set limit, the charging process is stopped until the limit is exceeded again.

  • Self-Sufficiency Thanks To A Solar Battery

    If you have a solar battery, you can be completely independent from the public grid for several days. The rule of thumb for the battery size is up to 1 kWh of battery capacity per 1,000 kWh of household electricity consumption. And up to 1.5 kWh per 1,000 kWh if you mainly charge your electric car in the evenings.

    It is worth noting that photovoltaic systems are almost always connected to the public grid. If the grid goes down, the battery and the solar panels will also cease to function. Do you want to rule out this risk? Then you should consider a solar battery with an emergency power solution.

     

     

     

     

     

     

     

     

     

     

     

     

    Building with photovoltaic system; car being driven out of the underground garage Solar panels: It doesn’t matter so much how you install them. It just matters that you do install them.

     

     

     

  • A Few Questions

    Family at the breakfast table, e-car is being refuelled by solar electricity in the background.A few questions need to be answered before purchasing a photovoltaic system - and then you can enjoy your breakfast.

    Before you purchase a photovoltaic system, we recommend answering a few questions:

    • What do you use electricity for? Household electricity? Heating? Electric car?
    • How many solar panels do you therefore need?
    • Do you need your own solar battery?
    • Are all your household appliances compatible with solar panels?
    • Are you leasing, buying or purchasing on finance? Which would pay off for you?

    You're not likely to find the answers chatting to your neighbour over the garden fence. You would be much better off contacting an experienced specialist.

    Tip: Don’t design your photovoltaic system too small. You should produce more solar power than you consume as a household. As a guide: at least 1 kilowatt peak (kWp) of electricity per 1,000 kWh of annual electricity consumption for your household and car combined. Systems of between 5 and 20 kWp are usually recommended.

  • How To Choose The Right Wallbox For You

    When deciding on a wallbox, it is crucial that the charging station and solar panels can communicate well with each other. For this to work, you need a smart wallbox. An energy management system may also be worth considering, as it always knows how much green energy is available and communicates this information to the wallbox, which will adjust its charging capacity to the amount of solar power generated.

    Electric vehicles can of course be charged faster with a 22 kW charging station, but not every electric car is automatically compatible with 22 kW charging. Check which charging capacity you need for your electric car before making a purchase.

    Our top product tip: the Webasto Live charging station, 11 kW, is compatible with external devices such as meters, energy management systems and back ends thanks to its communication interfaces, making it perfect for integration into photovoltaic systems. The smart wallbox also won the eMove360° Award in the Charging & Energy category in 2019.

     

     

     

    Webasto Live wallbox Make the most of your self-generated electricity with the Webasto Live charging station.
  • Let’s finish on even more good news: your solar panels require barely any maintenance, as they do not contain moving parts.
    And the rain will clean the panels for you. So you’ll be glad of a few showers as well as the sun!

  • Our Products
  •  
    webasto-wallbox-stand-slim

    Webasto Stand Slim

    Our high-quality, stainless steel charging pedestals are the perfect addition for an installation away from a fixed wall. Our slim version is ideal for domestic applications.

    » Learn more

    Webasto Live

    Smart, efficient, and connected: With the Webasto Live charging station, you use the opportunities and advantages of the electric mobility optimally. 

    » Learn more

    Webasto Mode 3 Type 2 Charging Cable

    Webasto Charging Cable

    Our "to go" charging cable allows charging at public charging stations. The Mode 3 type 2 charging cable is suitable for electric cars with type 2 connector. 

    » Learn more

  • Further Articles
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