Shelly Wiki

Energy

Electricity Tariff

Without a tariff the app shows watts. With one, it shows money.

Settings → Electricity Tariff is where you tell the app what electricity costs. Until you have, it can only show consumption in watts, never in money.

Adding a tariff

Choose Add tariff and fill in:

  • Price per kWh — what you pay.
  • Currency — for example SEK for Swedish kronor; pick whichever currency your bill is in.
  • Billing date — the day your period starts, so that the app's period matches your invoice.

The hard part: what does a kilowatt-hour actually cost?

There's no good answer, and it's worth understanding why before the number disappoints you.

Your electricity cost is made up of several parts: the price of the energy itself, the grid fee, taxes and VAT — the exact mix depends on where you live. Enter only the spot price and the app will show you roughly half of what you actually pay.

A reasonable approach: take an invoice, divide the total by the number of kWh, and use that figure. It isn't exact, but it's honest — and far closer to the truth than the spot price.

Hourly-priced contracts

The app's tariff is a fixed price per kWh. If you're on an hourly-priced contract, your real price changes every hour, and the app can't follow that.

You have two options:

  • Enter an average price and accept that the number is approximate.
  • Use a home automation system that fetches spot prices, if you want an exact cost per hour.

We haven't found any support in the app for importing hourly prices automatically. If you find it in your version, let us know.

What the tariff doesn't do

The tariff converts what has already been measured into money. It controls nothing. The app won't reduce your consumption or shift loads to cheap hours just because you entered a price.

If you want to control on price, you'll have to build it yourself with scenes — and then you run into the limitation above.

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