Got it. So 7A / ~350W minimum and then 1.4A / 70W steps above that.Sort of. The resolution of the XW-Pro is 1% steps, but the minimum is 5%. The maximum charge current is 140 amps, so it starts at 7 amps and has 1.4 amp steps above that.
In my case, I’ll have a maximum of 764W I’m trying to absorb, so just using a pair of ~320W chargers would get me there…I had thought about using 3 or 4 chargers. If you get a 2.5 amp, 5 amp, 10 amp, and 20 amp then you could do binary count and get any current from 0 to 37.5 amps in 2.5 amp steps.
Ouch! Yea, for +55% I’d at least delay my discharge to begin at 4pm.Even in Winter, the off peak to peak rate swing is still a 55% jump for me. Until I know how long my batteries will last, it makes it tough to calculate how much I am saving or is it wasting? At this rate, I will break even if the cells last 5 years, and they might make 7 years. In the Chevy Bolt, they are warrantied for 10 years, so I am hopeful.
My AC charger has an efficiency of 90% and my GTIL inverters are only 90% efficient, so charging from AC to discharge from 4-9pm is hardly worth it (even at +55%).
As it is, my winter 4-9pm rate is only +7% higher, so charging from grid would be a losing proposition…
Of course, my utility has just requested a +18% rate increase, so we’ll see how that breaks down in terms of peak-vs-offpeak and winter-vs-summer…