coach batteries went dead
I had to put my RV in storage in June. Today I went to check on it and the engine battery is fine, but the coach batteries are dead. If I hook up to shore power will the batteries maybe recharge or ...
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Also, it pays to keep an eye on how charging is working. While charging from the engine or shore power, the voltage at the batteries must go well over 14 to charge effectively, diminishing to around 13.5 to maintain the charge. The % of full charge can be estimated from a voltmeter reading several hours after all charging has ceased - 12.6 indicates 100%, 12.0 50% (as low as you can go without some damage). A battery monitor that shows the % charge accurately at all times can be had for as little as $25 if you have the skill to install it. I have this one from eBay.
