I recently bought a Growatt SPF 5000TL HVM inverter and successfully connected it to 3 x Pylontech US3000 batteries through RS485 communication. Screen shows Li for Lithium battery. Everything seems to work OK except that MPPT charging current does to go higher than 32A no matter what I do: increasing the size of the solar array, discharging the battery bank to a low SOC, changing Program 14 (charger source priority), updating the firmware, etc. I then changed to 4 x Pylontech US2000s and same problem, but in this case the MPPT charging current does not go higher than 25A. Anyone else experiencing the same problem?
Growatt advertises the maximum solar input for SPF 5000TL HVM as 4500W but with this limitation the maximum usable solar input is only 1600W (32x50) for US3000 and 1250W (25X50) for US2000. So, any PV more than 1600/1250W will essentially be wasted.