The parents of one group have a $2000 pls power bill every quarter, no idea with the others. The system owner is paying but we are refunding the cost of the MPP solar controller off the price, mainly because they were still working but we needed to change to higher capacity controllers to make up for the loss of the 2 x 80 amp MPPT controllers that were part of the failed inverters.supersparky wrote: ↑Fri Mar 25, 2022 6:21 pm Sounds like you have had a fun day today too. At least you recoup some of the cost by selling some of that surplus gear now. I wonder what the monthly power bill is at the usual residence. Who is paying for all this reworks?
My estimate of 5 hrs ended up taking 14hrs
All finished now anyway ... well, until May, then we have to do a service on the battery pack. Still trying to figure out how to disipate 600 amps @ 24vdc for 2hr to do the capacity test .... maybe 4 x 3.5kW water heater elements in the water tank powered by the ...... no, 3 x 5kva inverters won't power 14kW of heater elements for 2 hrs .... more thinking required ...
T1 Terry