My six 12v deep cycle bank charges to 12.7 typically.
A fully charged 12v battery is actually 13.2v
My six 12v deep cycle bank charges to 12.7 typically.
Actually you are both right. When new they will maintain 13.2 but as they age or if you have one weak one in the bank they drop to around 12.7.
Generally the voltage of a new lead acid battery runs 2.2 volts per cell. This degrades over time as the cells build sulphate. At least that’s what the Navy taught me and I’m sticking with it!