Inputs
Vehicle & Battery
Wall→battery (0.85–0.95 typical)
Use 186 Wh/km for metric
Charger & Circuit
80% continuous-load limit applies
Capped at 0.8 × breaker.
Wiring Run
ft
Leave as is; tool will suggest.
Home / Panel
Estimated concurrent household load
Time of Use (TOU) & Costs
Optional TOU periods (use local clock, 24‑hour HH:MM). Tool will schedule cheapest‑first within dwell window.
Summary
NEC 80% rule; advisory onlyAvailable power
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Energy needed
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Charge time
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Meets dwell window?
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Range/hr
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Est. cost (flat / TOU)
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Charge Time vs Amps
Includes 80% breaker cap and onboard charger limitTOU Energy & Cost
Cheapest‑first schedule within dwell windowVoltage Drop vs Run Length
Target <3% branchDetailed Results
FAQ
EV charging is a continuous load. Most codes (e.g., NEC) limit continuous load to 80% of circuit rating for safety. A 40 A breaker allows 32 A continuous.
The minimum of EVSE setting, circuit/breaker 80% limit, supply voltage, power factor, and your vehicle’s onboard AC charger rating.
Yes. Excessive drop wastes energy and heat. Keep branch <3% (feeder+branch <5% commonly suggested). Heavier gauge or shorter runs reduce drop.