Sungrow + Shelly

What Zerofy can do with Sungrow and Shelly

In practice

• Solar mode switches your Shelly plugs and relays on when there’s surplus, following your priority order and minimum runtime. Smart mode instead runs for a set number of minutes within the hours you allow.
• A Shelly plug can also measure a balcony solar system: set it as balcony solar meter in Zerofy.
• With a typical Sungrow home system (3–10 kW), plug loads get surplus on most sunny days; use priorities to decide whether they or bigger devices such as an EV charger come first.
• Zerofy gets new Sungrow data every 5 minutes and adjusts accordingly. A minimum runtime and an activation threshold in Autopilot keep passing clouds from interrupting switching.
• Zerofy also shows your Sungrow battery, so you can see whether surplus goes into the battery or into your appliances.
• Zerofy only sees devices in your Shelly Cloud account: a Shelly that was set up only locally, with cloud access switched off, won’t appear until you add it to your account in the Shelly app.

What Sungrow and Shelly offer on their own

Sungrow: The same DO relay can switch any other load through a contactor in Timing, Switch or Intelligent Mode; there is one relay per inverter.

Shelly: In the Shelly Smart Control app, scenes can switch loads when a Shelly Pro 3EM measures export (negative power), e.g. a three-stage heating rod at 1,500, 3,000 and 4,500 W of surplus with a 2-minute validity condition. Shelly notes that load priorities or forecasts need an external control system; plain scenes only react to thresholds.

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

Setting up Sungrow and Shelly in Zerofy

1. Connect Sungrow

Zerofy connects to your Sungrow system through the iSolarCloud cloud, using your iSolarCloud login.

1. Make sure your Sungrow inverter is online and registered in iSolarCloud.
2. Add Sungrow in Zerofy and log in with your iSolarCloud credentials.

Step-by-step guide for Sungrow

2. Connect Shelly

Zerofy connects to your Shelly Cloud account; it switches plugs and relays on and off, records their power every 5 minutes and lets Autopilot run them on solar surplus or in Smart mode.

1. Set up new Shelly devices in the Shelly app first.
2. In Zerofy, open the Shelly section under HVAC and Appliances and enter your Shelly account credentials.
3. Select the devices you want to use in Zerofy.

Good to know: A Shelly Pro 3EM is added separately in the Meters section; the device list there only shows Shelly Pro EM meters.

Step-by-step guide for Shelly

3. Turn on Autopilot

In Zerofy, open your Shelly plugs and relays, 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 Shelly plugs and relays 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 Sungrow solar production.

Learn more about Smart Mode

About Sungrow and Shelly

Sungrow – Chinese inverter and storage maker based in Hefei. Homes typically have an SH-RS single-phase hybrid inverter (3–6 kW) or an SH-RT three-phase hybrid inverter (5–10 kW) with the SBR battery (6.4–25.6 kWh, 3.2 kWh modules), connected to the cloud through a WiNet-S/S2 dongle. Monitoring app: Sungrow iSolarCloud.

Shelly – Shelly Group (formerly Allterco) is a Bulgarian company based in Sofia. It makes Wi-Fi smart plugs, relays for the switch box or DIN rail, and energy meters such as the Shelly Pro 3EM. Products: Shelly Plug S Gen3, Shelly Plus Plug S, Shelly 1PM / Plus 1PM / 1PM Gen3, Shelly Pro 2PM, Shelly Pro 3EM energy meter.

Manufacturer information last checked: October 2026.

All devices that work with Sungrow