
Home Assistant Green collects locally the readings from the Shelly Pro 3EM-3CT63, which reads the main incomer and the phases with three 63A clamps, and from three Sonoff MINI-1GSP relays metering the circuits you want to follow. Everything lands in the Home Assistant Energy dashboard, with graphs, comparisons and automations even without internet.
What it does
- The Shelly Pro 3EM-3CT63 uses three 63A clamps to measure power and energy on each phase, or on the single phase of a single-phase installation.
- The three MINI-1GSP measure the consumption of the circuits they are fitted on, for example the kitchen, the laundry and the air conditioning, and switch them on or off.
- Home Assistant Green receives the readings over the home network and shows them in the Energy dashboard, with graphs by hour, day and month.
- The panel compares the total with the individual circuits and shows the share of consumption that is not yet metered.
- The automations run locally: switch off a circuit above a threshold, get a notification, set the schedules.
- With a solar system, the same panel can show generation and export by adding the inverter's readings.

How to install it
What's in the kit

| Qty | Item | Unit price | Subtotal |
|---|---|---|---|
| 1 | Home Assistant Green – universal local smart home hubCoordinator | €223.46 | €223.46 |
| 1 | Shelly Pro 3EM-3CT63 three-phase meterEnergy monitoring | 129,83 € | 129,83 € |
| 3 | Sonoff MINI-1GSP relay with energy monitoringRelay / switch | 20,40 € | 61,20 € |
| 1 | Wago 221-413 lever connectors, 10 piecesAccessory: connections · connections for the modules | €8.99 | €8.99 |
| 1 | BTicino surface-mount consumer unit, 8 modulesAccessory: DIN enclosure · 3 DIN modules + spare space | €18.50 | €18.50 |
| 1 | Assorted crimp ferrules, 900 piecesAccessory: wiring · wiring inside the distribution board | €11.99 | €11.99 |
| Kit total | €453.97 |
Prices taken from Amazon.it on 22/09/2026: they can change, and the price shown by Amazon at the time of purchase is the one that applies.
Add the whole kit to your Amazon basket6 items, 8 units · optional items are added from the individual linksDelivery, returns and warranty: Amazon shows these at the time of purchase.
Before you order
Do you need a hub?
Yes, and it is included: Home Assistant Green collects the Shelly and Sonoff readings and runs the Energy dashboard and the automations. The Shelly and Sonoff devices connect to the home Wi-Fi, Home Assistant Green to the router by cable.
Does it work with Alexa, Google or Apple?
The energy dashboard is used from Home Assistant, in a browser or in the app. Home Assistant can expose devices to other assistants through its integrations, and Shelly and Sonoff have their own apps as well. For the kit's metering and automations it is best to stay in Home Assistant.
Do you need an electrician?
Yes. The Pro 3EM-3CT63 and the MINI-1GSP relays are wired to the 230V line in the consumer unit or in the back boxes: the work must be done by qualified personnel with the system isolated. Setting up Home Assistant you can do yourself.
What happens if the internet goes down?
Almost nothing changes: Home Assistant Green works locally, so the readings, the Energy dashboard and the automations carry on over the home network. Without internet you cannot get in from outside and you receive no push notifications on your phone until the line is back.
Is a subscription needed?
No. Home Assistant runs locally with no subscription. There is an optional paid service for easier remote access, but it is not needed to use the kit. The Shelly and eWeLink apps are also free of charge for the functions the kit uses.
Can I add more circuits?
Yes. You can add more metering relays, smart plugs and the solar inverter's data, if Home Assistant supports it. The Energy dashboard brings them together. Write to us from the contacts section for a custom kit.
Do I need to buy any batteries?
No. Every device in the kit is mains-powered and Home Assistant Green comes with its own power supply in the box. So there are no spares to keep at home and no charge levels to watch: during a power cut the devices stop and start up again by themselves when it comes back.
What if a product is out of stock on Amazon?
It happens, especially with multipacks and newly released products. Write to us from the contacts section with the kit code and the product you can't find: we'll point you to an alternative that fits the rest of the kit, so it keeps working as described.
Why buy on Amazon?
We put the kit together and tested it ourselves, picking the parts and checking that they work together. Purchase, payment, returns and warranty are handled by Amazon: delivery times, returns and warranty are shown on Amazon at the time of purchase, item by item.
Notes
Not included
- Router and network cable for Home Assistant Green, if not supplied in the box
- Electrical work in the consumer unit and on the circuits
- Junction boxes for the relays, if not already there
- Solar system
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