Savings calculator

What would Sundial save you?

Your utility's actual rates. No account, no card, no Tesla login.

Your estimate
≈…
saved per month

Estimate — we don't have your utility's rates for this region yet, so this uses a blended national average. Enter your own rates below to sharpen it.
Your plan credits exported solar at close to full retail, so your bill nets out whether you use solar now or later — automatic solar charging won't save much on its own. Sundial still automates peak-avoidance charging and battery priority, and grandfathered plans change (and expire).
Even at this usage, Sundial keeps more of your own solar in the car — free to use.

Your utility's real published rates and export credit — your actual local number, not a national average.

  • ✓ Real published rates
✓

Zip only — never shared, used once to look up your local tariff.

How Sundial captures it — automatically
  • Plug in once
    Leave it plugged. No daily fiddling, no schedules to set.
  • Sundial watches your solar
    The moment your panels make more than the house uses, it starts charging.
  • It follows the sun all day
    Charging speed ramps up and down with your surplus — so it goes to the car, not the grid at 3¢.
Tesla or any OCPP charger Works with your Powerwall
Fine-tune your estimate system size · days home · rates
7 kW
Have a Powerwall?
Sundial coordinates around your Powerwall — you set the battery floor.
Start free with these numbers
No card needed · free to use

Estimate. Actual savings depend on your tariff, weather, and driving.

Don't drive a Tesla? These savings still apply — Sundial controls OCPP wall chargers (Wallbox, Emporia, ChargePoint, and others) directly, so any EV brand works. Not sure about your charger? Email your setup →