Reduced charging rates in 12kW parallel operation
I have 5 x 12kW Sunsynk inverters running in parallel with 110kW PV array and 172kWh battery bank.
My problem is that I always get reduced PV charging rates, maxing at 48kW, however if I switch off PV to the other 4 inverters, and remaining with 1 inverter, each other inverter is able to charge at 12kW.
How do I improve my charging rates for all inverters and running in parallel?
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The 12kW inverter has a Max DC power of 15,600W.
You say you have 110kW of PV, ie. effectively 22,000kW per inverter. This exceeded the power that can be used by the MPPT controllers as long as you have not exceeded the max allowed Voc. How did you distribute the number of panels per string to each inverter? What type andn size panels are you using?
The 12 kW inverter has 2 MPPTs, but allows 2 string connected to the primary MPPT (26A) and one string to the second MPPT (13A) controller.
The max Voc of all the panels in series in one string should not exceed 1000V (although the data sheet show 800V).