Now we’re moving into Winter and less sun to power the solar I am wondering if it is worthwhile recharging my ac200max units overnight to use during the following day. The overnight rate for electricity is about 30% cheaper versus the day rate. Ordinarily I would say it is worthwhile, but I don’t know what losses I would get with the ac200max during charging and then supplying the energy back through the inverter.
Any feedback or comments gratefully received - thanks
Depending on your load you you lose about 20-30% while Charging and Discharging.
additionally you put charge on your battery and ware it out
The rated capacity and is about 2kWh (in realty you get only ~1,3-1,8kwh out)
2Kwh*3500 charge Cycles rataed life is 7000kWh
2000$/7000kwh = 28cent
So even if the Bluetti would be 100% efficient and even if the input energy would be free.
every used kwh out of the blueetti cost you about 28cent
Additional You have ~25% charge discharge loss.
Thanks alot, that is very clear and helpful. So my conclusion is that it really isn’t worth recharging the ac200max units with offpeak unless any saving goes beyond 30% for peak versus offpeak rate. I thought your cost/kwh for the unit itself was interesting, as I don’t think that accounts for the pass through power use when receiving sufficient solar, plus the fact that after the 3500 cycles you should still get about 80% capacity. So if you also consider these two factors I think the cost/kwhr would be less, but then I guess you also need to factor in the solar panel cost. Thanks again - very helpful:+1:
Yes, but not may have tested this. and its not under any warranty.
+You would need 10 Years to get this. its highly unlikely this product will work for 10+ yeras.
+I omitted the loses During charging and discharging so you would add ~30% loss
+I calculated with rated capacity and not the usable capacity. ( also ~30% lower)