Jerry Hudgins via EV wrote:
Jay Summet wrote:
If you are looking to make a L1 (120 volt at 8-12 amps) EVSE have this
behavior (and have a bit of electrical wiring ability) you can use a
"self latching relay" such as this one: [...]
Thanks, Jay. I'll have my electrician look into that possibility.
If this is for the J1772 EVSE, it has a low-current "pilot" signal that
can enable or disable charging. The details are described here:
https://en.wikipedia.org/wiki/SAE_J1772
Stopping the EVSE from charging is a simple as opening the "pilot" wire.
A small relay can be wired up so you press a button to start charging.
The relay pulls in, and connects the "pilot" wire to the J1772 receptacle.
When you release the button, the relay is held on by AC power from the
EVSE. If AC power is lost, the relay drops out, opens the "pilot" wire,
and charging won't resume when AC power is restored unless you push the
button again.
Lee
--
We cannot solve our problems with the same thinking we used when we
created them. -- Albert Einstein
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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