How can I enable Smart Charging to maximize solar consumption and minimize energy costs? How does it work?


  • Measurements of both Grid and Solar panels
    • In case of the EV Wall Business and EV Base products you need a additional Smappee Infinity to measure this
    • In case of the EV Wall the package contains the necessary equipment to do the measurements
  • A decent Solar Forecast (This requires measurements for at least a week)
  • (Optional: Custom Tariffs on the Charging Square service location)

How does it work?

Smappee Smart Charging can optimize your charging sessions by maximizing self-consumption of energy produced by solar panels, and by charging during the cheapest possible periods. Enabling Smart Charging can be done either by using the 'Charge with solar' option in Scan and charge, or in the case of an EV Wall or EV Wall Business, by utilizing Smart Charging Schedules. Generally, Scan and charge is used in a commercial setting while Smart Charging Schedules is most useful for residential applications.


When smart charging has been activated, Smappee's optimization algorithm knows how many kilometers of range need to be charged and by what time this is needed. The kilometers are recalculated into energy, using a conversion factor of 0.2 kWh/km. Note that this is a good estimation for most EVs but it may not be perfectly accurate depending on weather conditions and your driving style.


Once the required energy and remaining time is known, the optimization algorithm will determine the optimal periods to charge in the next 24 hours. This is based on a combination of forecasted solar production, forecasted consumption, and electricity tariffs. This planning is adjusted in almost real-time depending on the live consumption and production. The algorithm will always favor the usage of excess solar energy. If it is not possible to fully charge the EV with only solar energy, it will use energy from the grid but at the cheapest possible tariff. In any case, the priority is to always deliver the requested energy so that the driver is never left with an empty battery.


Please note that some time is needed to be able to calculate an accurate consumption and solar production forecast for new installations. Smart charging will be less accurate during the first few days after installation of the Smappee monitor, because we still need to learn about your energy usage. Moreover, the optimization only plans for the next 24 hours. If your departure time is more than 24 hours in the future, it will be ignored and your EV will start charging immediately.


If you have an EV Wall (Business), you can set up smart charging using the app:

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