Power Price - Your companion for calculating usage & costs
Power Price is there to calculate & give insights on the usage and costs for any device.
It’s optimised to work with dynamic or switching energy prices based on time of day.
1. Create a Power Price virtual device
2. Choose the type of measuring you would like (kWh, W, m3, GJ, l, g, oz, gal, ft3)
3. In settings of the device you can optionally set the preferred currency
4. Use the device action cards to start, update & stop measuring of a usage session
5. The session outcome will be stored in the device and can be used inside flows with the device capabilities or look vat trends via insights.
Example flow
Washing machine flow
Solar Energy yield
Useful links
Contributions
If you appreciate this app, contribute to future development by making a paypal contribution
See for more apps link below 
or just open the pull down.
4 Likes
New app update (
LIVE: 2.0.0.):
1. NEW: Changed App name to Power Price (instead of Usage Mate) for a better app description
If you find any issues, send a report via the mobile homey app
More - apps - Power Price - settings wheel right top - send diagnostic report (put your email in the input field to make it easier)
2 Likes
What type of device you need to use the flow above? For example, I can’t find Energy_tarif label in any of my devices. Can this be used with washing machine connected to smart power plug?
@Jari_Peuhkurinen energy_tariff is a custom variable in homey which I made
I don’t have a flexible tariff so made a variable in homey
1 Like
Okay. Thank you. If / when you have time, could you make an example flow to a machine what is connected to smart plug.
Hi @Jari_Peuhkurinen
I created a sample flow based on an energy socket. Text is semi in 
so hopefully it’s all clear.
Devices like Washing machine or dryer are a bit more difficult (but not impossible), since you need to check the minimal and maximum (Watt) values of the device in order to see if they are really running or just idling in their program. Since this can differ from machine to machine best to look at a washing session with the smart meter.
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In collaboration with @martijnpoppen
