Charge your electric car with your own photovoltaic electricity

and enjoy 100% emission-free driving

Charging an electric car with the electricity from your own photovoltaic system (PV system) is worthwhile. ​

After all, a PV system can deliver up to 1,000 kWh (kilowatt hour) of electricity per year per installed kWp (kilowatt peak). With an average electric vehicle¹  this corresponds to 5,000 km of emission-free driving fun per year. At the same time, the wallet is happy about this type of cost-efficient loading.​


Charge electric cars with photovoltaics and save money​

Due to the falling feed-in tariffs and rising electricity costs, the self-consumption of PV electricity is becoming increasingly important. Instead of reselling the electricity you produce yourself for a low profit², you should consume or temporarily store as much electricity as possible yourself.

The savings for every self-consumed kilowatt hour can be up to 24 ct today, as you neither have to use expensive electricity from the grid (electricity costs: 21 to 30 ct/kWh) nor you have to temporarily store your self-generated PV power in the grid.​

²Feed-in tariff in Germany for new systems in June 2021 7.58 ct / kWh for systems up to 10 kWp, 7.36 ct / kWh for systems up to 40 kWp and 5.77 ct / kWh for systems up to 100 kWp

Charge electric fleets with solar power​

Commercial use

Charging with self-generated electricity from a photovoltaic system is becoming increasingly interesting in a commercial context. Even electric company fleets can be intelligently controlled and charged with photovoltaic electricity in a very cost-efficient manner​.

illwerke charge their EVs with self-generated electricity from photovoltaics

- controlled by ChargePilot's dynamic load management​

At the illwerke in Voralberg, the electric vehicles are already charged with self-generated solar power. A photovoltaic system with an output of 62 kWp is installed for this purpose. The photovoltaic system generates up to 62,000 kWh per year, which can be used to charge electric vehicles. ChargePilot, the charging and energy management from The Mobility House, is in use at the Bregenz location and controls a total of 56 charging points dynamically. The electricity generated by the photovoltaic system is dynamically considered when distributing the charging power. If more solar power is generated than the parking garage consumes, this flows directly into the electric vehicles. In addition, the illwerke has the option of charging the electric vehicles with up to 75 kW from the grid when there is little solar radiation.​ 


Further information can be found in this press release.

Load management for electric fleets

With an average consumption of an electric vehicle¹, the illwerke can cover up to 310,000 km annually with self-generated solar power 100% emission-free. With 15,000 kilometers driven per electric vehicle, up to 21 electric vehicles per year can be operated purely with self-generated solar power.

This results in significant cost savings, as the electricity generated is not fed into the grid (remuneration in June 2021 approx. 5.77 ct / kWh) but is used to charge the electric vehicles (approx. 21 ct / kWh for charging with Mains power).​

Concept Professional for charging electric fleets

Depending on the use of the charging stations, an individual measurement concept must be observed. If the electricity is used exclusively for the company's own vehicles, in most cases no additional measurement concept is required. Furthermore, the individual guidelines for the EEG levy must be considered.

We would be happy to provide you with information on your individual options in our Concept Professional on all technical and legal aspects that must be taken into account when using a photovoltaic system to charge electric vehicles.​

illwerke charge electric fleets with PV electricity

The Charging and Energy Management system ChargePilot from The Mobility House intelligently and dynamically controls a total of 56 charging points.

Philipp ÖsterleProduct Developer Charging Infrastructure at illwerke vkw

Charge EVs from private households with PV electricity​

The Calabrese family lives in a single-family house and has recently started driving a VW ID.3. The family would preferably like to charge it via the in-house photovoltaic system in order to use the solar power generated as fully as possible and thus be completely emission-free as often as possible. To use the solar power, the Calabrese family installed a solar solution consisting of an additional meter and a solar manager.​

With this solution, the Calabrese family can supply power storage, residential building and charging station with electricity from the photovoltaic system.

In order to use as much of the generated PV electricity yourself as possible, a corresponding usage profile (of electric cars and auxiliary consumers) is crucial. Suitable solutions, such as power storage, can help to temporarily store excess PV electricity for later use.

Based on their driving and charging profile, the Calabrese family can cover 70% of the energy their electric car needs with solar power.​

With the average consumption of the VW ID.3 and an annual mileage of 10,000 km, it would need 2,000 kWh of energy per year. In the present case, 1,400 kWh could be covered by self-generated solar power, which means that up to 7,000 km can be covered without emissions. Assuming a maximum cost saving of 24 ct/kWh, this results in annual cost savings of almost 350 €.​

¹Reference vehicle VW ID.3, consumption according to ADAC 19.3 kWh / 100km, rounded up for the example calculation. Charging losses were not taken into account here.

The Calabrese family not only supplies the charging station with electricity from the photovoltaic system

The residential house and electricity storage are also connected to the solar power, as shown in the following schematic diagram.

The Calabrese family benefits from solar power in several areas

Thanks to our PV system, our car can be used almost exclusively with solar power. This not only saves us cash, but also saves around 500 kg of CO2 annually.​

Calabrese Family

For private customers, we have various solutions in our online store, which enable the charging of electric cars with self-generated solar power. Our portfolio ranges from controllable charging stations and stations with their own PV charge logic to complete solutions that can also control other consumers in the household.

Charging with 100% solar power is adjustable for all solutions. Find the ideal solution for you here.

Are you looking for individual consultation? We would be happy to support you.

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