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Old 08-14-2014, 09:04 AM   #6
FW28z
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Brand: Thor Motor Coach
Model: 2011 Four Winds 28Z
State: Michigan
Posts: 1,273
THOR #531
Batteries can sometimes "recover" a bit after non use. As you use a battery, the internal temperature raises... the heavier the load, the higher the temperature.

When the battery is allowed to rest, the temperature returns to normal, which can give the illusion there is more charge in the battery than there was after you used it.

Perhaps this is what is giving you a false reading and making you believe the batteries were charging? It's probably an extreme condition, but who knows.

So plan "B" might be to install a solar panel or two on your roof for recharging the batteries while you drive down the road.

Of course, that means you need to drive places were it is sunny all the time - but is that a bad thing?

Thing is, the conventional wisdom is for the longest life, never let deep cycle batteries go below half-charge. Kind of makes the term "deep-cycle" an oxymoron doesn't it?
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