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Re: two-phase 50amps electric switch for EV charger

Fri Nov 23, 2018 2:48 pm

LeftieBiker wrote:
Nothing unplugged, however.

Yeah, lightning isn't Bad Magic - it can't plug things back in and then fry them, and it can't jump several feet or more inside the house from plug to socket. Maybe if the EVSE were unplugged but the plug was still just inches away from the socket, and aligned with it...
My point was the breaker is not going to be protecting against a lightning strike.
Although consider unplugging the vehicle.
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Re: two-phase 50amps electric switch for EV charger

Sun Nov 25, 2018 5:18 am

Baltneu wrote:I keep my EVSE supplied by Nissan plugged in all the time to the 14-50 NEMA receptacle.
Never heard of unplugging when not in use. It does not draw any power until plugged into the car.

Ditto, except in the case of lightning.

As for the latter. Not true. The EVSE does draw a tiny bit of power (usually just a few watts) when in standby as opposed to thousands of watts (passed to the car) when the connected car is actively charging.

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Re: two-phase 50amps electric switch for EV charger

Sun Nov 25, 2018 1:18 pm

I do not have a Leaf any more to measure it but the OpenEVSE units I build draw less that 3W in standby. EVSE's draw very little when they are not working. Certainly in league with a clock.
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Re: two-phase 50amps electric switch for EV charger

Sun Nov 25, 2018 4:55 pm

^^^H'mm, ca. 26.28kWh/year assuming only standby. Money-wise it's irrelevant, but on a nation-wide basis x 120m households the energy starts to add up, 3.1536GWh, although still a tiny fraction of U.S. electricity usage (not far short of 4 PWh). During my off-grid sales days I was once chastised by housemates because I insisted they unplug the microwave between uses to eliminate the vampire draw of the clock. Negotiations reached a compromise - they'd leave it plugged in, and cover the annual extra cost of a few bucks :lol: But even now, many residences and living situations later, I still have my infotainment electronics on a switched powerstrip - when they're off, they're OFF. The microwave stays plugged in because it's the only clock in that part of my place.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

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Re: two-phase 50amps electric switch for EV charger

Mon Dec 03, 2018 10:46 am

Here's my EV charger project photos -
(the drywall now needs some spackling and painting )

ps. With feedback from this forum, I haven't installed the switch so NEMA 14-50 and charger will always be energized

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