Ready by morning, cheapest way possible.
Tell Wattlark when the car must be ready. It finds the lowest-cost window, uses surplus sun when there is any, and shows the saving against charging at the evening peak.
Charge window
Ready by 7:00 am
Charging 11 pm to 4 am at 9¢/kWhCharging window chosen against day-ahead price.
Four behaviours, each visible in the app and recorded in the household activity log.
Ready-by scheduling
Set a target charge and a departure time. Wattlark works backwards to the cheapest window that gets there.
Solar surplus first
On sunny days the car can take the energy that would otherwise be exported at a low credit.
Cost shown every time
Each plan shows its cost and the cost of plugging in at the peak, so the choice is visible.
Household aware
Members can override a plan for one night; the owner sees every change in the activity log.
Four steps, no black box.
- 01Target
Choose a charge level and a departure time.
- 02Search
Hours are ranked by price and expected solar surplus.
- 03Schedule
A window is proposed with its cost.
- 04Override
Anyone allowed can charge now for a trip.
What Wattlark reads and controls
| Signal | Access | Status |
|---|---|---|
| Charger state and power | Read | Planned |
| Vehicle charge level | Read where the charger exposes it | Planned |
| Charge window | Suggest, then control on approval | Working in demo |
| Price by hour | Read | Simulated in demo |
Live equipment connections are planned work. In the demo a simulation stands in for meters, inverters and chargers.
Plain answers.
Does it need my car account?
No. Charging is planned through the charger; vehicle accounts are not required.
What if plans change?
Override the window from the app, or press charge now.
Bring your home into the picture.
Early access opens in small groups. Leave your details and we will write when your group opens.