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Overloading a NISSAN EVSE with a Roadster UMC ?
- Thread starter TEG
- Start date
You should watch it. He uses a J1772 to NEMA 14-50 adapter first. That part doesn't preserve the pilot signal from the EVSE.
He then plugs a Roadster UMC into the adapter and with the 14-50 plug on the UMC, it generates a 40AMP (secondary) pilot signal to the Roadster.
He then manually selects 40 AMP charging from the Roadster VDS without checking the label on the EVSE or the breaker behind it.
I happen to know that those Nissan/Aerovironment EVSEs were typically rated only for 30 amps.
Nissan EV Charging Stations – AeroVironment, Inc. Online Store
When people overload an EVSE like that it might work for a short while, but overheat the equipment, and cause it to have pre-mature failure later.
You can end up with problems like melted pins on the J plug...
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Hopefully the EVSE has overcurrent protection. If not, things may break. Most 30A EVSE's are on 40A breakers (next size up, required for the 125% rule).
I know some PlugShare chargers shut down if they detect the car drawing too much current; in fact, I've seen one that shut down unless the car was set to 2A under.
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