[RE-wrenches] Charging a Bolt with an SW

[Hilton Dier III]

The issue with EV chargers is that they create a lot of reactive power. 
Think of it as "slosh" in the waveform. That means that charging at 
2,000 watts sloshes a lot more than 2kW through the cable, plug, outlet, 
and from the inverter. If you've got a reasonably good sinewave inverter 
the charger will like it fine. However, the inverter might not like the 
charger if you cut things too close. Make sure to have a lot of top end 
left in your inverter. Always use a transformer based inverter. The SW 
series has a big chunk of metal in it, so that's good. At 120V the Bolt 
will only draw 1440 watts max.

An aftermarket Bolt 240V charger can draw up to 32 amps. That's 7.7 kW, 
so too big for an SW. Treat it more like 40 amps. The OEM 120/240 EVSE 
(smart charging cord) that comes with the car can draw 8 or 12 amps at 
120V or 12 at 240V. Assume that the 8 amps is really 12 and the 12 is 
really 15 or a bit more. I have seen 15 amp plugs and outlets with the 
hot prong melting plastic around it. The plug on the OEM EVSE is 20A 
rated but make sure your outlet is as well.

-- 
Hilton Dier III
Missisquoi River Hydro
Renewable Energy Design

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