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ITGlossary · EV charging
Solar Surplus Charging (PV Charging)
A charger function that uses surplus solar production to charge the vehicle instead of exporting it to the grid.
Technical level:Intermediate
Through a meter at the supply or a link to the inverter, the charger knows how much energy is left over from production and adjusts the charging current to absorb it. On sunny days the car fills up with your own energy, which would otherwise go to the grid for low or no compensation.
There is a minimum, however: AC charging does not start below 6 A, which is about 1.4 kW on single phase or 4.1 kW on three phases. That is why some chargers switch automatically from three-phase to single-phase operation when the surplus is small.
The function only pays off if the car stays plugged in around midday. If it is away all day, choose a mixed setting with a guaranteed minimum charge from the grid.
Related terms
- CCS2 (Combined Charging System)The European connector standard that adds two DC pins below a Type 2 plug, allowing fast DC charging through the same vehicle inlet.
- Dynamic Load BalancingA function that continuously measures the building's consumption and automatically lowers the charging power so the supply limit is not exceeded.
- On-board Charger (OBC)The converter inside an electric vehicle that turns the station's AC into DC and sets the maximum AC charging power.
- Wallbox (home wall charger)A wall-mounted EV charger that charges with AC from its own circuit in the panel and communicates with the vehicle for safe charging.
- AC ChargingCharging with alternating current, where the vehicle's on-board charger converts it to direct current to fill the battery.
- EV Connector Type 2The standard AC charging connector for electric vehicles in Europe, also known as Mennekes.