Adding an EV changes your energy math. See the extra daily energy, panels and charger size you'll need.
Charge time assumes charging at your selected charger's full power — actual time may be longer at low battery temperatures or with slower onboard chargers.
Charging losses (heat in the cable, the car's onboard AC-to-DC converter, battery chemistry) typically waste 8-12% of the energy you pull from the wall, which is why the daily energy figure is slightly higher than "distance × efficiency" alone.
This tool answers "how much solar do I need for my EV" — a separate but related question is the load calculation for EV charger circuits (also written as EV charger electrical load calculation): whether your home's electrical panel and the circuit feeding the charger can safely handle it, independent of solar. That's a code-driven calculation, not a solar-sizing one:
Because EV charging is classified as a continuous load (running 3+ hours at a stretch), electrical code requires the breaker and wiring to be sized at 125% of the charger's rated draw, not just matched to it — this is separate from whatever "load calculation" a solar installer runs to size panels. If you're also adding solar and considering a service upgrade, an electrician performing a whole-panel load calculation (NEC 220.83, load-summing all your existing circuits plus the new EV circuit) will determine whether your existing service size supports both the charger and any planned solar/battery equipment without an upgrade. Always confirm exact requirements with a licensed electrician for your specific panel and local code.
If you're off-grid or want to charge from solar directly during the day, size for it. If you're grid-tied with net metering, your exported daytime solar and nighttime EV charging can net out over the billing period even without extra panels — check the Net Metering Calculator.
Only if you want to charge the car from stored solar after dark without touching the grid — otherwise the EV's own battery is the "storage." Use the Battery Size Calculator if you're planning whole-home storage anyway.
It's the electrical-code check (not a solar-energy calculation) confirming your breaker, wiring and main panel can handle the charger's continuous draw — typically requiring circuit ampacity at 125% of the charger's rated current, per NEC 625 and 220 rules. A licensed electrician should confirm this before installation.