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Originally Posted by Bhfromme
Okay maiden voyage last weekend in our 2018 2108DS. Second night we woke up to dead batteries? Yes we were running furnace but still. We have two new Group 24 batteries. We could dry camp in our R-pod for two nights in the winter no problem. And that was on one battery not two!
I did not run the generator during the day but I did get batteries back up close to 100% (all four lights on panel) with my 90 watt solar panel. Then 3am Sunday we wake up to dead batteries. Not good.
Took it to dealer and they tested everything and are saying everything is fine. How can that be. I'm sure you guys dry camp in weather needing the furnace. How do your batteries perform?
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Do you know if they load tested the batteries? What is the date on the batteries? A battery can show a full charge but fail a load test, they could also be cheap batteries, there is a large range of quality/amp hours on deep cycle batteries, or one could be bad but if they tested the bank with them connected together it could hide that and 1 bad battery could take down the good one.. What is the amp hour rating?
You can do a amp hour test with some 12 volt lamps of a known wattage and a timer. The lamps must be connected in parallel and the total wattage added up and divided into the voltage.
Regardless of what tests are being performed the batteries should always be tested individually from each other for the reasons mentioned above.
If everything tests out good it may be that the furnace draw, and whatever else you are using is greater than on your old trailer.