
12-01-2009
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Senior Member
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Join Date: Sep 2003
Location: Auckland New Zealand
Posts: 1,809
Rep Power: 9
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Quote:
Originally Posted by huguley3
I got a xantrex unit and it will automatically go into inverter mode when the shore power is disconnected. not a big deal when you know its happening but if you are not on the boat and the power goes out then whatever battery is connected can get sucked dry. I do know that it will run my window ac unit for about 10 minutes though.
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I have a Xantrex Freedom25 inverter that has the charge and inverter function but I have never used it to charge because it was the wrong input voltage (110v while our mains is 220v). Maybe because of that I'm not qualified to respond to the above. But . . . . .
I believe the only way that the inverter will switch from charge to inverter mode is if there is a mains appliance running on the inverter when the power goes down. The charger (I think) is a by-pass circuit and the incoming mains will power any appliance that is switched on as well as charge the batteries. So when the power goes down and the appliance starts demanding another source of energy, the inverter will go looking for it from the batteries. Then, yes, it will drain the batteries until it goes below the threshold voltage of the inverter (at which point it will cut out) or until the mains power comes back on.
Ordinarily with the inverter on and no appliance running, it draws around 0.2 of an amp to stay "alive" with no incoming mains power. But that is all.
I switch my inverter off when not in use, I have no shorepower.
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