Originally Posted by bcrvman
I think what Bill meant was converter, an inverter turns DC into AC. When you do this, disconnect the battery cable and measure voltage of the converter leads and after an hour measure the battery. You have to let a battery 'settle' to get an accurate reading.
Keep in mind an RV converter is designed for a system where you are always plugged in and its job is to simply act as a trickle charger.
He may have meant inverter, it displays the incoming DC voltage when it's operating. When you say to disconnect the battery cable, do I just pick one? I have about 8 or 9 cables on my two batteries. Where are these converter leads? I don't understand the entire process you're describing.