FoxESS + Huawei SCharger

What Zerofy can do with FoxESS and Huawei SCharger

In practice

• Zerofy adjusts the charging current of your Huawei SCharger 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 FoxESS home system (2.5–15 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 FoxESS 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 FoxESS 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.
• In Huawei’s own mode, the 22KT charges three-phase from about 4.14 kW and drops to single-phase below that if “Switch Between Single and Three Phases” is on; it then charges on L1 only, so Huawei advises wiring L1 to the least-loaded phase. Via OCPP, Zerofy sets the power but not the phases, so the minimum is 6 A: about 1.4 kW single-phase or 4.1 kW three-phase.

What FoxESS and Huawei SCharger offer on their own

FoxESS: FoxESS sells its own AC wallboxes. Paired with a FoxESS inverter and meter, FoxCloud 2.0 offers PV Linkage with a Green Mode (solar only) and an Economic Mode (solar first, grid keeps it at 6 A when solar is short), adjusting the charging current between 6 and 32 A.

Huawei SCharger: Huawei’s own surplus mode is “PV Power Preferred” in FusionSolar. It needs a Huawei SUN2000 inverter and a Huawei Smart Power Sensor at the grid connection (DTSU666-FE directly, or an RS485 meter such as DTSU666-H relayed by the WLAN/FE Smart Dongle) and does not work in charger-only setups.

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

Setting up FoxESS and Huawei SCharger in Zerofy

1. Connect FoxESS

Zerofy connects to the FoxESS cloud: you log in with your FoxESS Cloud account and authorize access on FoxESS’s own screen.

1. Make sure your inverter is online and registered in the FoxESS Cloud app.
2. In Zerofy, choose FoxESS and log in with the FoxESS Cloud owner account.
3. Confirm your devices on the FoxESS authorization screen.

Good to know: Use the owner account of the device. Installer and agent accounts don’t own the devices, so FoxESS shows “No Devices” and the connection fails.

Step-by-step guide for FoxESS

2. Connect Huawei SCharger

The SCharger connects to Zerofy via OCPP, which is set in installer mode of the Huawei Fusion app; Zerofy can then start, stop and set the charging power.

1. Update the charger to FusionCharge V100R023C10SPC220 or later (OTA via the app).
2. In Zerofy, add a Huawei SCharger and copy the OCPP link (ocppconnect.net/<id>).
3. In the Fusion app, connect to the charger’s Wi-Fi, log in with Installer Mode and open OCPP.
4. Choose “Insecure transmission with basic authentication” and enter domain ocppconnect.net, port 80, path and username <id>, and any password.

Good to know: OCPP can only be set in installer mode, so many owners need their installer for the one-time setup. Older firmware must be updated first.

Step-by-step guide for Huawei SCharger

3. Turn on Autopilot

In Zerofy, open your Huawei SCharger, 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 Huawei SCharger 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 FoxESS solar production.

Learn more about Smart Mode

About FoxESS and Huawei SCharger

FoxESS – Fox ESS is a Chinese inverter and storage maker founded in 2019 and headquartered in Wenzhou. Homes typically have the single-phase H1/AC1 (2.5–6 kW) or KH (7–10.5 kW) hybrid inverters or the three-phase H3 Smart (5–15 kW), with EP, EQ or ECS batteries. Monitoring app: FoxCloud 2.0.

Huawei SCharger – The SCharger is the wallbox of the Chinese inverter maker Huawei (7.4 kW single-phase or 22 kW three-phase), the natural choice for homes with a Huawei inverter. It is sold through solar installers and is set up and monitored in FusionSolar. Products: SCharger-7KS-S0, SCharger-22KT-S0.

Manufacturer information last checked: October 2026.

All devices that work with FoxESS