I have solar system 12v with tubullar battery 200AH and one solar panel with 500watt power
my problem that my solar inverter have a fan sound every 20 minute durinaly but this matter stops at noctural ( I think it charges the bateery and stops)
my setting for the solar inverter belonging to the battery is:
bulk voltage 14.1v
battery stop discharging volatge when grid is available 11.5v
floating charging voltage 13.5v
low DC cut off battery voltage 10.2