Solar EV charging FAQ

Solar charging means the car charges from your own panels, not the grid. The Veton® charger reads the surplus from the main meter. The setup depends on the building, the panels, and when the car is parked.

Can a Veton charger use solar energy?

Yes. The Veton® charger reads the building’s grid meter, or a Xemex P1 module (bundled with the charger) or HomeWizard P1 module on the smart meter. It decides locally how to use the surplus. Seven modes are available:

• Off — no charging.
• Fast — charge at the maximum the installation allows.
• Solar — charge from exported kilowatts only. Pause when surplus drops.
• Solar+ — solar first, then a controlled top-up from the grid.
• Smart — schedule at the sunniest hours, and the cheapest on a dynamic tariff.
• Capacity — cap the monthly peak so the capacity tariff does not move.
• Manual — set the current yourself, within installation limits.

The control loop runs at 1 Hz on the charger itself. Decisions follow real conditions, not cloud round-trips. The charger is OCPP-open and integrates with Loxone, Niko Home Control, KNX, Crestron and others.

Do I need a battery for solar charging?

No. A home battery widens the window in which solar reaches the car. Park during the day and you do not need one. Park in the evening and a household battery, or a dynamic tariff, fills the same role.

What does the Veton mobile app show during a solar session?

Live state of the car (Ready, Car Connected, Charging, Paused, Complete). Active power, per-phase voltage and current. Session total in kWh, and the RFID tag in use. You can watch the power rise and fall as the Veton® charger tracks the surplus. Session history is kept per charger and per RFID tag, with CSV export.

What should be planned early?

Four things, early:

• A grid meter the charger can read in real time.
• Coordination across chargers, solar, battery and tariff, if there is more than one charger on site.
• A place for the component enclosure, with power and network.
• The charger position, set against where the car actually parks.

Do I need a separate solar meter or inverter connection?

No. The Veton® charger reads the main grid meter. When the building exports, that export is the surplus signal. No inverter integration is needed.

How does the Solar+ grid limit work?

The grid limit is a ceiling on total import from the grid, set for the whole building. The car takes the solar surplus, plus whatever headroom is left under the ceiling after the house has had its share. Set the ceiling to zero and the car charges from solar only.

I have a home battery — will the car drain it?

No, with battery protection on. The Veton® charger holds a configurable margin so the car charges from real solar surplus, not from the house battery. The battery stays for the house.

Installation configuration

Solar and Smart modes work best with the installation entered once:

• Array size in kWp.
• Roof orientation and pitch, one entry per plane.
• Location, for spot prices and the solar forecast.
• Home battery size and protection margin.

The installer sets this at commissioning.

Can Veton charge from solar without an inverter connection?

Yes. The Veton® charger reads the main grid meter, so no inverter link is required. One configured meter, nothing else. The car starts the moment the panels produce more than the building is using.

Last updated: 1 July 2026