Quote:
Originally Posted by Doorguy88
So when I turn my inverter on everything works as it should and is says 13.8 volts on the screen. I have not checked the battery’s yet I’ll do that tomorrow.
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It's confusing to learn about batteries and monitors that show voltage.
A fully charged battery is 12.7 volts. So, if you see anything above 12.7 volts you are not reading the battery voltage - you are reading a battery charger's voltage.
Battery chargers and alternators, etc charge batteries at between 13.4 and 14.2 volts. So, if you check your batteries and they show 13.7v you are not seeing your battery's voltage. You can't use that figure.
If you unhook from shore power, or turn off your generator, or turn off the engine on your motorhome, i.e. stop charging, your batteries will still lie to you and show a surface charge from the charging you just turned off.
Wait a few hours and then look at your batteries. Ah, then you'll get a better idea of their true state. Wait over night and viola... that's more likely your battery's true voltage.
So, whenever anyone says, "my batteries are charged. They show 13.7v." We know that... nope, that's not really the case.