EcoWatch in Finland: the electricity price clock for spot contracts

Spot-price electricity is everyday life in Finland: the price changes every quarter hour, and the saving comes from running the washing machine, the sauna, the water heater and the car charger in the cheap hours. The problem is that nobody keeps checking an app. An electricity price clock solves that: EcoWatch shows today's and tomorrow's prices as a ring of colour on the wall, and the whole household sees at a glance when to wait.

This page covers what EcoWatch does specifically in Finland: how it uses the FI price area and 15-minute prices, how to include the transfer fee, electricity tax and VAT in the colours, and how ordering to Finland works. For the basics first, read how an electricity price clock works.

The Finnish price area and 15-minute prices

Finland is a single price area, FI. EcoWatch fetches the Nord Pool day-ahead prices from Waltrix's server over Wi-Fi and shows them in euros. Tomorrow's prices reach the clock at about 14:00 Finnish time, as soon as the exchange publishes them, so the evening and the morning can be planned over dinner.

Since October 2025 the day-ahead market prices electricity in 15-minute periods. EcoWatch has supported quarter-hour prices since firmware 3.4.0, and the update reaches the clock automatically. Julia with the 12-hour dial shows one LED per quarter, so a price jump at 17:15 appears as its own dot. Ida shows the hourly average and Johanna six LEDs per hour. All models compare tomorrow's prices the same way.

Transfer fee, electricity tax and VAT in the colours

The spot price is excluding tax and excluding transfer. In Finland the bill total is made of the spot price plus the seller's margin, VAT at 25.5 %, electricity tax and the network company's transfer fee. If you want the colours to reflect what you actually pay, the EcoWatch settings page has an Extra price section with three fields:

• Added flat price (c/kWh): seller's margin, electricity tax and the energy part of the transfer fee, added together. The figures are in your electricity contract and the network company's price list.
• Added percentage: VAT, 25.5 in Finland. The percentage is applied after the flat and tariff additions.
• Added price during tariff (c/kWh): if your network company has a time-of-use transfer tariff, i.e. a more expensive daytime rate in the winter months, enter the difference here and set the tariff hours on the same page.

The clock calculates (spot price + flat addition + tariff addition) × (1 + percentage / 100) and shows a worked example under the fields. The colour thresholds and all rules then use the total price. The tariff hours can also be shown in orange on the inner ring, which is useful even on a fixed-price contract.

The screenshot shows the settings page in Swedish; switching the clock's language changes these texts too.

Settings in Finnish, no app

1. Plug in the power. The clock opens a Wi-Fi network called EcoWatch-Julia-xxxx (or Ida / Johanna). Join it with your phone and choose your home Wi-Fi.
2. Open http://ecowatch.local in a browser. Choose Finnish as the language, FI as the price area and EUR as the currency.
3. Pick a colour mode: daily average is a good default, green hours highlights the cheapest hours of the day, own limits lets you set the c/kWh thresholds.
4. If you want, fill in the Extra price fields as described above.

Prices appear within a minute. Detailed instructions and troubleshooting are on the help page and in the frequently asked questions.

Switch devices and see your power

The same clock can also switch things. Shelly smart plugs and relays are added from the clock's Devices page, and a rule such as "on when the price is below 8 c/kWh" runs the water heater or the car charger in the cheap hours without an app or a cloud service. Guide: switch Shelly plugs by electricity price.

The HomeWizard P1 meter connects to the HAN port of the electricity meter and shows the home's current power on the inner ring of Ida and Julia. In Finland the HAN port usually has to be activated on request by the network company, free of charge with most companies. For Home Assistant users the clock publishes price, price zone and brightness over MQTT, see EcoWatch in Home Assistant.

Which model for a Finnish home?

Julia is the most common choice: the size of a kitchen clock, quarter-hour resolution and an inner ring. Ida costs the least and suits a desk, Johanna is readable across a living room. The full comparison is in the buying guide.

Ordering to Finland

Order at en.waltrix.se, where prices are shown in euros and include VAT. We ship from Järna, Sweden, within the EU, so there are no customs duties or extra charges. Shipping is priced by weight and shown at checkout before you pay. The right of withdrawal is 14 days. The clocks are designed and assembled in Sweden, and the firmware keeps updating automatically over Wi-Fi for years.

Common questions in Finland

Do I need a spot-price (pörssisähkö) contract? You gain most with one, because the use you shift shows directly on the bill. With a fixed-price contract the clock still shows the market price and the hours of a time-based transfer tariff.

Does the clock show the price with VAT? Not by default: the spot price is excluding tax. In the Extra price setting, put 25.5 as the percentage addition and the colours are calculated with VAT.

Does EcoWatch work without an app? Yes. The clock fetches the prices itself over Wi-Fi, and settings are on the clock's own web page, available in Finnish.

Where do I order from Finland? At en.waltrix.se, where prices are in euros and include VAT. Shipped from Sweden within the EU, no customs.

What if the clock is not right for me? 14-day right of withdrawal, as with all our products. See the refund policy.