See what your battery really earns

Every quarter of an hour, WattsWise works out what your home battery saves on your dynamic electricity price, and it can charge it when power is cheap and use it when power is dear.

Start for freeTry the demoWorks with Tibber, EcoFlow STREAM and SolarEdge

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  • Charge
  • Discharge
  • Self-use or wait

Difference on this day €0.48

An example day of quarter-hour prices. WattsWise charges in the cheap hours and uses that power in the expensive ones.

Savings in euros

Per day, month and year: what your battery and your panels earn you, worked out with your real quarter-hour prices.

Smart charging

Let WattsWise steer your battery by the price and the solar forecast. Or just watch: your choice.

Free

No subscription, no ads, no tracking. Your data stays in the EU.

What it looks like

Your savings
Your savingsWhat the battery and the panels earned this month, day by day.
Tomorrow’s plan
Tomorrow’s planWhen the battery charges and discharges, as soon as tomorrow’s prices are in.

Read how it worksSee which devices work