Your car charges when electricity is cheapest.
WattVise starts your charger when it's your car that's plugged in, follows the spot price, grid fees and the grid's carbon intensity, and has the car ready when you leave. Housing associations run all their chargers from one place.
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-0.02 to 0.11 kr/kWh before fees and VAT, from elprisetjustnu.se. Charging: the night's 14 cheapest quarters, as a smart plan picks them for a car that needs three and a half hours.
One night, minute by minute.
Tomorrow's prices are in
Spot price, grid fee and CO₂ for every quarter hour, plus solar surplus. You get a note with tomorrow's cheapest hours.
It's your car
It reads the battery level and target from the car itself, starts only for your own car and plans around your departure: below a battery level you set it charges right away, and if the car won't be ready in time, you're told now, not in the morning.
Charging starts
In the cheapest, cleanest quarters. Priced the way you actually pay: spot with your markup and VAT, time-of-use grid tariffs and power fees, or a fixed price.
Ready, and on the books
A notification when it's done, or if a charger goes offline in the night. Cost, CO₂ and charging curve per session, savings over time, a driving log if you want one, CSV and a monthly report.
For housing associations
The association's cars charge when electricity is cheap.
The board picks how, for example the cheapest hours before the morning, and WattVise pauses and resumes the chargers to follow it. Residents don't need to do anything; if the board allows it, one who needs to charge now starts again with their tag or the charger's app, and one who wants to save more turns on the smart plan, which reads their car's battery level.
So that not every car draws at once, the board can let only so many charge at a time, which keeps the power fee down; with a meter, the load is also balanced against the main fuse. The board sees every charger in one place and is alerted when one goes offline.
Everything an association gets →
Companies get the same for charging at work: each employee's kWh per month at the company's price, a basis for salary deduction or invoicing. What a company gets →
| Charger | Status |
|---|---|
| 01 | Paused by the app, waiting for cheap hours |
| 02 | Paused by the app, waiting for cheap hours |
| 03 | Paused by the app, waiting for cheap hours |
| 04 | Finished charging |
| 05 | Nothing plugged in |
| 06 | Offline · alert sent |
| Rule: when it's cheap or normal · the paused cars resume when the price drops | |
Works with
- Chargers
- Zaptec, Easee, Wallbox, Charge Amps and OCPP chargers such as CTEK
- Cars
- Polestar, Volvo, Tesla, BMW and MINI, Kia, Hyundai, Skoda, VW, BYD and more · Xpeng, Zeekr and Lynk & Co without a login: no battery level, recognised by the charging tag
- Meters and load balancers
- Tibber Pulse, Easee Equalizer, Zaptec Sense, Shelly, Perific, HomeWizard
- Also
- Home Assistant, solar panels, ntfy, an API for your own scripts
- In the app
- A driving log, sharing a charger with your household, statistics per car or RFID tag, Swedish and English, installs on your phone · Everything it does →