Ran out of 12 DC @ 3 AM 1st night.
Our first boon dock night in our new to us MH and the 12V DC went dead. When I bought the coach they told me the batteries were fairly new I need to see if they have dates on them. Now for the use may...
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With all the stuff you mentioned running, I'm not surprised the batteries ran down overnight, based on years of full timing and reading on forums like this one. Tonight make sure you run the generator before bed. When you get home, best to get that 12V adapter installed in the bedroom. But for now, you might just get a looooonnng extension cord so you can plug into the nearest 12V outlet.
Yes, an inverter does draw a relatively large amount of power at idle. Newer models are better then older models of course. Most manufactures finagle the ratings and state 80% to 90% efficiency but that's a pipe dream. Most can't reach 75% in practice, some poorly designed units only reach 50%.
Of course this all goes back to the batteries and if the batteries were cheap to begin with, that 9 volts you saw might mean they're not going to last long. You let them get that low too often and they'll be ruined.
Yes, an inverter does draw a relatively large amount of power at idle. Newer models are better then older models of course. Most manufactures finagle the ratings and state 80% to 90% efficiency but that's a pipe dream. Most can't reach 75% in practice, some poorly designed units only reach 50%.
Of course this all goes back to the batteries and if the batteries were cheap to begin with, that 9 volts you saw might mean they're not going to last long. You let them get that low too often and they'll be ruined.
