EV Charger Load Calculator
Use this EV charger load workflow to screen the load impact of one or more EVSE units against an entered existing load and panel rating.
- EV load
- A
- Adjusted EV load
- A
- EV load
- VA
- Adjusted total load
- A
- Panel utilization
- %
- Remaining entered capacity
- A
Calculation details
- Capacity status
- Calculation basis
- Selection boundary
Recent results
Formulas
- EV load amps = EVSE current x charger count
- Adjusted EV load amps = EV load amps x continuous multiplier percent / 100
- EV load VA = EV load amps x voltage x phase multiplier
- Adjusted total load amps = existing calculated load amps + adjusted EV load amps
- Panel utilization percent = adjusted total load amps / panel rating amps x 100
Use this calculator
Estimate EV load amps, adjusted EV amps, EV load VA, adjusted total panel load, utilization, and remaining capacity from entered assumptions.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This EV charger load estimate is a planning screen. It does not perform a service load calculation, approve load management, select conductors or breakers, or prove code compliance.
FAQs
Does this approve adding an EV charger?
No. It screens entered load values only. A final decision needs load calculation, EVSE settings, utility, permit, and local review.
Is this the same as EV charger circuit sizing?
No. This page looks at panel or service load impact. The EV charger circuit page screens the individual circuit ampacity.
Where should existing calculated load come from?
Use a project load calculation or other verified planning basis. The calculator does not determine it from dwelling details.