Fronius + Easee

What Zerofy can do with Fronius and Easee

In practice

• Zerofy adjusts the charging current of your Easee charger but doesn’t switch phases. On a three-phase connection, solar charging needs at least about 4.1 kW of surplus (6 A × 3 × 230 V); on a single-phase connection about 1.4 kW.
• A typical Fronius home system (3–10 kW) needs a sunny midday to reach the 4.1 kW three-phase minimum. Wired single-phase, the charger starts from about 1.4 kW but charges at no more than about 3.7 kW.
• Zerofy gets new Fronius data every 5 minutes and adjusts accordingly. A minimum runtime and an activation threshold in Autopilot keep passing clouds from interrupting charging.
• Zerofy also shows your Fronius battery, so you can see whether surplus goes into the battery or into the car.
• If your car is connected to Zerofy too, turn on Autopilot for either the car or the charger, not both.
• Easee needs at least 6 A to start, which is about 1.4 kW on one phase and 4.1 kW on three. If the charger’s phase mode is set to automatic, Zerofy warns you and plans with the three-phase minimum until Easee reports single-phase charging; a fixed single-phase setting lets charging start from about 1.4 kW, but caps it at about 3.7 kW.

What Fronius and Easee offer on their own

Fronius: Fronius sells its own Wattpilot wallboxes, manufactured by go-e in Austria, a company Fronius holds a stake in. Wattpilot charges on solar surplus from 1.38 kW with automatic 1/3-phase switching, but only with a compatible Fronius inverter (GEN24, Verto, SnapINverter with Datamanager 2.0) and a Fronius Smart Meter at the grid connection point.

Easee: Easee’s own solar charging needs an Easee Equalizer on the site (the P1/HAN version reads the smart meter, Equalizer Amp measures with current sensors) and Easee as site operator. The Easee app then offers “Surplus only” and “Limited grid usage”; it does not read any inverter directly.

Zerofy connects the two: it reads Fronius production and controls your Easee charger to match, together with your other devices in one app, with dynamic tariffs and forecast-based Smart mode.

Setting up Fronius and Easee in Zerofy

1. Connect Fronius

Zerofy reads your system from Fronius Solar.web through a guest account that you create for Zerofy.

1. Make sure your Fronius inverter is online and shows up in Solar.web.
2. In Solar.web, go to Settings → Permissions and create a new guest account.
3. Add Fronius in Zerofy and log in with the guest account credentials.

Step-by-step guide for Fronius

2. Connect Easee

Zerofy logs in to your Easee account and starts, stops and sets the charging current through the Easee cloud.

1. Make sure your Easee charger is online and added to your Easee account.
2. In Zerofy, add an Easee charger and log in with your Easee account.

Good to know: Data synchronisation depends on how often the Easee cloud updates, so live values in Zerofy can lag behind the charger.

Step-by-step guide for Easee

3. Turn on Autopilot

In Zerofy, open your Easee charger, turn on Autopilot and choose Solar – or Smart to also use dynamic tariffs and forecasts. Set the priority, activation threshold and minimum runtime.

Dynamic tariffs

Zerofy can also run your Easee charger on dynamic electricity prices (EPEX Spot or Nord Pool, e.g. Tibber or aWATTar) or on a fixed time-of-use tariff. Smart mode combines those prices with forecasts of your household consumption and your Fronius solar production.

Learn more about Smart Mode

About Fronius and Easee

Fronius – Austrian manufacturer of inverters, welding and battery-charging technology. Homeowners typically have a Primo GEN24 (single-phase, 3–6 kW) or Symo GEN24 (three-phase, 3–10 kW) hybrid inverter, older Primo/Symo SnapINverters, and the Fronius Reserva battery (6.3–15.8 kWh). Monitoring app: Fronius Solar.web.

Easee – Easee is a Norwegian charger maker. Its current EU model Charge Max is a compact 22 kW box with built-in LTE and a MID meter that also runs on 3×230 V IT grids; the predecessor Charge Up leaves the EU market at the end of 2026. Products: Charge Max, Charge Up, Charge Lite, Charge, Home, One.

Manufacturer information last checked: October 2026.

All devices that work with Fronius