An easy and safe way to save electricity
The eFeeler controller has been developed for monitoring and optimizing electricity consumption. It is integrated into the property’s electrical system, and control is done through an easy-to-use mobile application.
The controller continuously monitors the real-time price of electricity on the market and provides users with an easy way to optimize the use of connected electrical devices during the most cost-effective times.
eFeeler is at its best, for example, in controlling electrical vehicle charging or use of hot water heaters.
How does eFeeler work?

eFeeler has been implemented with co-financing from the European Union. The goal was to develop a product for easy control of exhange electricity. With the support, we were able to commercialize the eFeeler controller for customers’ access.
- Controller to be installed in the property's electrical system.
- Data transfer through Wi-Fi, Bluetooth, and cloud service (AWS)
- Mobile application for Android and iOS Devices
- Real-time monitoring of electricity market prices
- No monthly fee
- Examined and tested CE-marked product
- Designed and manufactured in Finland
- eFeeler controller
- 2 pieces of 2.4 GHz antennas
- USB-C cable 1m
- DIN-rail adapter
- 4 pieces of screws for wall mounting
- User manual
- Nominal voltage AC: 100 – 240 V
- Maximum load 32 A (16A x 2)
- Current consumption: < 1W
- Number of channels: 2
- Operating temperature: 0 – +85 °C
- Enclosure: IP20
- Bluetooth: 5.2 Yes
- Wireless standard: Wi-Fi 802.11 b/g/n
- Wi-Fi : 2.4 GHz
- Material: Plastic
- Dimensions without antennas (Height x Width x Depth): 15 x 7.7 x 3.5 cm
- Dimension with antennas (Height x Width x Depth): 26 x 15 x 3.5 cm
- The application requires an Android or iOS smartphone to function
- The installation of the controller can only be carried out by an authorized electrician

Daily electricity market prices
The source of electricity market prices used is Nord Pool Spot prices. Prices vary significantly on a daily and hourly basis. The eFeeler smart relay helps optimize electricity consumption for the cheapest hours of the day.
Electricity price forecast (AI)
Experimental prediction of market electricity prices using a machine learning model
Asetus | Kulutus laskelmat viimeisen 30 päivän aikana |
---|---|
Hintaraja asetuksella: 8.0snt/kWh | 1kW laitteella kulutus olisi ollut 8.58€/kk |
1kW laitteella ilman eFeeler ohjausta kulutus olisi ollut 42.81€/kk | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 510 tuntia päällä | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 210 tuntia pois päältä | |
Kuukauden keskiarvo hinta 5.95snt/kWh |
Asetus | Kulutus laskelmat viimeisen 30 päivän aikana |
---|---|
Hintaraja asetuksella: 10.0snt/kWh | 1kW laitteella kulutus olisi ollut 10.61€/kk |
1kW laitteella ilman eFeeler ohjausta kulutus olisi ollut 42.81€/kk | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 532 tuntia päällä | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 188 tuntia pois päältä | |
Kuukauden keskiarvo hinta 5.95snt/kWh |
Asetus | Kulutus laskelmat viimeisen 30 päivän aikana |
---|---|
Hintaraja asetuksella: 12.0snt/kWh | 1kW laitteella kulutus olisi ollut 14.21€/kk |
1kW laitteella ilman eFeeler ohjausta kulutus olisi ollut 42.81€/kk | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 565 tuntia päällä | |
Tällä asetuksella eFeelerin ohjaama laite olisi ollut 155 tuntia pois päältä | |
Kuukauden keskiarvo hinta 5.95snt/kWh |
Resellers
The eFeeler controller is available for sale in well-equipped online stores and department stores.
The eFeeler application is available for free download on iOS and Android devices.

Xedi is a technology partner founded in 2019, offering its customers design services for electronics and embedded systems for industrial and consumer products. Their clients include international automation, medical, and technology companies. Xedi is based in Seinäjoki.
Technical support
Juha Mäki
p. 040 0358 634
juha.maki@xedi.fi
Samuli Oja-kaukola
p. 050 548 5572
samuli.oja-kaukola@xedi.fi