I have a solar installation comprising 10 panels, a Victron Multiplus inverter 48/5000/70, two MPPTs, Lynx1000 Distributor and a Cebox GX. The batteries originally installed proved incompatible and have just been replaced by 3 Pylontech US5000 Li-ion Batteries. The aggregate gross capacity is 14.2 kWh and the net usable as the SOC set to 15% is 12.25 kWh . The batteries are set to charge for 4 hours during the principally cheap period and reach 95% capacity
What I understand is called “Round-Trip Efficiency” seems very poor. It appears to take 14.2kWh from the grid to charge the batteries to 95% but only discharges during the day to the consumer unit 10.1 kWh (they discharge to the grid is negligible). This implies the batteries need between 4 & 6kWh to function? I have been assured by the installer ithat the ESS and DVCC are correctly configured
I am a layperson with very little technical knowledge – if anyone can give me any advice or help I would be very grateful
Chris
10,1 / 14,1 = 71%
Yes, could be realistic.
Look also here for example:
You can calculate your efficiency from your own production report.
How to find the production report: