← EV charger installation bid calculator
Both connect the same circuit to the same charger, so the decision is not really about price -- the calculator prices the two only about a hundred dollars apart on a typical install. It is about whether the homeowner wants to unplug the EVSE, and about which connection type the charger's own manufacturer warranties.
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Hardwired. The circuit conductors land directly on the EVSE's terminal block or junction box -- no plug, no receptacle. There is one fewer connection in the circuit, and it is not the connection type most exposed to a continuous full-amperage load for hours at a time.
NEMA 14-50 receptacle. The EVSE plugs in like a range or an RV. That buys portability -- unplug it to swap chargers, take it when you move, or share the circuit with an RV or welder that also uses a 14-50 -- at the cost of one more connection that has to be rated and installed for continuous duty, not just for the occasional high draw a 14-50 was originally used for.
Manufacturer warranty. Read the EVSE's installation manual before deciding. Some chargers ship as hardwired-only, some as plug-in-only, and some support both but only warranty one -- this is a real constraint from the manufacturer, not a code question this page can answer.
Same 48 A charger, same 25-foot indoor run, same spare panel slot, same wage and margin settings -- installed both ways, priced by this calculator's own bid engine:
| Install type | Labor hours | Contractor price |
|---|---|---|
| Hardwired EVSE | 5.65 | $1,263.36 |
| NEMA 14-50 receptacle | 6.05 | $1,374.04 |
The receptacle version runs $110.67 higher -- a $45 listed 14-50 device plus about 24 extra minutes to mount and terminate it, both marked up through the same overhead and margin as the rest of the job. That gap holds roughly steady across runs and locations; it is not the number that should decide this, since a longer run or a trench moves the total by far more than $111 either way.
Hardwiring lands the EVSE's conductors directly on a junction box with no plug or receptacle in the circuit, which removes the one connection in the circuit rated for continuous duty that is a plug-and-receptacle pair rather than a fixed splice. A NEMA 14-50 receptacle costs a little more in parts and labor but lets the homeowner unplug the EVSE -- to swap chargers, sell the house without leaving hardware behind, or share the circuit with an RV or welder that also uses a 14-50 plug. Check the charger manufacturer's installation manual first: several EVSE models only warranty one connection type.
Only slightly. On a typical 48 A install this calculator prices the receptacle version about $111 higher than hardwired, all else equal -- the device itself plus roughly 24 extra minutes of labor to mount and terminate it. That gap is much smaller than what location, run length, or panel work move the price by, so it should not be the deciding factor on its own.
Use a receptacle and plug listed for the charger's continuous load -- EVSE draws its full rated current for hours at a time, which is harder on contact quality than the intermittent draw a standard 14-50 was originally rated for. Confirm the specific device the manufacturer's installation manual calls for and the adopted code in the jurisdiction; this page does not make that determination for you.
Usually, if the run and breaker were already sized for it -- the receptacle gets removed and the conductors land directly on the EVSE's terminal block, which is a smaller job than the original install. Going the other direction (hardwired to plug-in) means adding a receptacle and a compatible EVSE, which is closer to redoing the termination end of the job. Either direction is a real labor item, not a five-minute swap, and should be bid as one.