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RS 450/100 with with 8 x 540 watts and total Voc 397. Firmware is 1:08 but on cloudy days still getting #35 error. Voltage all below 450 volts even at our lowest daytime temperatures. I have three units all doing the same. I have a few RS units with 7 x 540 which are not displaying error code. However, according to RS spec it should be coping with 8 x 540?
What is the battery float Voltage at the time of the error? Remember that the PV Voc should not be more than 8x battery float Voltage.
Check your PV configuration to adhere to section 3.4 in the manual:
https://www.victronenergy.com/media/pg/SmartSolar_MPPT_RS/en/installation.html#UUID-a96ec91b-a21c-0536-1a40-278fd7f9410d
