A battery that reads the price list.
Charge from surplus sun, hold a reserve you choose, and spend the stored energy when the grid is most expensive. Three modes, one clear explanation of what it is doing and why.
Charged on sun, spent on the evening peak
State of charge against the price curve.
Four behaviours, each visible in the app and recorded in the household activity log.
Balanced, savings, backup
Balanced favours self-use; savings leans harder on price; backup holds charge for outages. Switch any time.
Price-aware charging
On time-of-use and dynamic plans the battery charges in the cheapest hours when the sun cannot fill it.
Reserve you control
The reserve slider is a hard floor. Wattlark never proposes spending below it.
Every decision explained
Charging and discharging windows come with a sentence saying why, in the activity log.
Four steps, no black box.
- 01Read price
Day-ahead rates from your plan define cheap and dear hours.
- 02Forecast sun
Expected generation sets how much to leave for the roof to fill.
- 03Set windows
Charge and discharge windows are drawn within your reserve.
- 04Review
You approve the plan; the log records what ran.
What Wattlark reads and controls
| Signal | Access | Status |
|---|---|---|
| State of charge | Read | Planned |
| Charge and discharge power | Read | Planned |
| Operating mode and reserve | Suggest, then control on approval | Working in demo |
| Backup events | Read | Planned |
Live equipment connections are planned work. In the demo a simulation stands in for meters, inverters and chargers.
Plain answers.
Will it drain the battery before an outage?
The reserve is a floor and backup mode holds more. Neither is a guarantee of supply during an outage.
Which batteries are supported?
Live connections are planned. The demo models a 13.5 kWh unit.
Bring your home into the picture.
Early access opens in small groups. Leave your details and we will write when your group opens.