dhanson865
Well-known member
edit: the part below the --- is the original post, jump to page 4 at least if you want the current scoop.
--------
My current charging situation is me and a coworker sharing two EV only parking spaces with 4 x 120v jacks on the curb. Turns out both pairs of outlets are on the same breaker. Word on the grapevine is that the breaker is 20 amp but I haven't personally seen it.
My coworker plugs in at 6am and the first time I plugged in between 2 and 2:30pm. The other car unplugged at 2:35pm. The breaker tripped at 4:09pm.
I was surprised that the breaker tripped while only one car was charging but apparently the heat of the cable run hadn't dissipated and the additional heat of the afternoon sun was enough to trip it.
Since then we have been charging one car at a time but if I get an evseupgrade or openevse I might try to charge at the same time by lowering my amperage.
So given the overlap worked for 15 minutes and the load was definitely 24 amps how far do I have to turn down the adjustable EVSE #2 if EVSE #1 is fixed at 12 amps?
Down to 8 amps and push the 20 amp limit as the overlap is only a couple of hours a day?
Down to 6 amps to give more headroom during the overlap?
Either way I'd start a new session at 12 amps after he leaves.
And hopefully we'll get a new circuit down the road but for now until management decides how much they want to spend I have this situation.
--------
My current charging situation is me and a coworker sharing two EV only parking spaces with 4 x 120v jacks on the curb. Turns out both pairs of outlets are on the same breaker. Word on the grapevine is that the breaker is 20 amp but I haven't personally seen it.
My coworker plugs in at 6am and the first time I plugged in between 2 and 2:30pm. The other car unplugged at 2:35pm. The breaker tripped at 4:09pm.
I was surprised that the breaker tripped while only one car was charging but apparently the heat of the cable run hadn't dissipated and the additional heat of the afternoon sun was enough to trip it.
Since then we have been charging one car at a time but if I get an evseupgrade or openevse I might try to charge at the same time by lowering my amperage.
So given the overlap worked for 15 minutes and the load was definitely 24 amps how far do I have to turn down the adjustable EVSE #2 if EVSE #1 is fixed at 12 amps?
Down to 8 amps and push the 20 amp limit as the overlap is only a couple of hours a day?
Down to 6 amps to give more headroom during the overlap?
Either way I'd start a new session at 12 amps after he leaves.
And hopefully we'll get a new circuit down the road but for now until management decides how much they want to spend I have this situation.