If I set the Prime to charge at 8amp max at home on level 1, it appears that limit is also “enforced” on a level 2 public charger? Just plugged in at work on a ChargePoint charger that charges me by the hour, and got virtually no electricity after three hours with the setting at 8 amp. Do I really have to remember to switch back between 8 amp and max every day depending on where I am charging and if it is level 1 or 2? Robert
Correct, Amperage and Voltage are not related. I am unclear why you need to set the Prime to 8 amps at home, but assuming you do, you could do so by buying a EVSE that allows an 8 Amp rate, so the Prime need not be set. As an example: 8-16A Adjustable 120-240V Charger EVSE – EVSE Adapters
Thanks! I wanted to charge at 8 amps at home because I noticed the connection end of my extension cord becoming a bit warm when charging at 12 amps -- not hot but just a tiny bit warm. If that's ok and normal then I guess I could go back to 12 amps. I'm connecting to a 20 amp breaker but need to use an extension cord for distance. I'm using a 50 foot length 12 gauge extension cord (stretched out and not coiled at all).
I think warm to touch is perfectly normal. If it is on 20A breaker and not tripping it when you plug it in, you should be OK to use it at 12A. I have been using mine on 15A breaker and no problem using with an extension cord.
A little warm is OK, as @Salamander_King said. I'd check it often to see if it continues to get warmer as the charging time gets longer. 50 feet is stretching it a bit for an extension cord for charging. I'd recommend using at least a 12 gauge cord. I use a 12 gauge 25 foot extension for L1 and it doesn't heat up at all.
Give good consideration to a better extension cord, a quality 10 AWG cord would do a great job for you. Rob43
Since you are on a 20 amp circuit, you could upgrade to a 50 foot 10 gauge extension cord for about $60 from Home Depot.
If you have a normal 120 volt 15 Amp receptacle: www.amazon.com/dp/B000BQO824 If you actually have a 120 volt 20 Amp receptacle: www.amazon.com/dp/B000HEC2DW
Be sure the prongs of the plug are straight and fit tightly into the receptacle. The prong end of the extension cord is the "plug." The end with the slots is the "connector." Whichever one is running warm, if it isn't clean and tight, cut it off and install a heavy duty one. It'll be rated at 15 amps, that's fine, but it will be heavier and better quality with better electrical connections. The cheapest grounded 15 amp, 125 volt plug is about $3. The priciest, excluding locking, watertight, and hospital grades, is about $15. Avoid the cheapos.
