TSUN + Shelly

What Zerofy can do with TSUN 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.
• Even a small TSUN system (typically 0.8–3 kW) covers plug loads such as a dehumidifier or an e-bike charger on sunny days.
• Zerofy gets new TSUN data every 5 minutes and adjusts accordingly. A minimum runtime and an activation threshold in Autopilot keep passing clouds from interrupting switching.
• 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 TSUN and Shelly offer on their own

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 TSUN 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 TSUN and Shelly in Zerofy

1. Connect TSUN

Zerofy connects to the TSUN cloud with your TSUN Smart login and reads your inverter data.

1. Register your system in the TSUN Smart app.
2. In Zerofy, add an inverter, choose TSUN and log in with your TSUN Smart credentials.

Good to know: Only TSUN Smart accounts work (inverter IDs starting with Y); TSUN Home accounts are not supported. Battery and meter data are only partly available, depending on the system.

Step-by-step guide for TSUN

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 TSUN solar production.

Learn more about Smart Mode

About TSUN and Shelly

TSUN – TSUN (TSUNESS Co., Ltd., Suzhou, China, with a German office in Frankfurt) makes microinverters from 300 W single units to 3.3 kW 6-in-1 units. In Europe it is mainly found in 800 W balcony systems such as the TSOL-MS800, often combined with TSUN balcony storage (MSU2000, MSU4000Elite). Monitoring app: TSUN Smart.

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 TSUN