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hi. I never remove our batteries. we installed 4-100 watt solar panels 3 years ago. we also at the same time installed 4 6 volt golf cart batteries wired for 12 volts with a total of around 660 amp hours. when we store our camper for the winter, we live in Northwest Indiana, I leave the switch on to the coach and the panels so far have kept up the 12 to 13 volts during the winter. i check my water once a month in the batteries. we used to boon dock a lot and the panels kept up the voltage. i use a cpap machine at night and the batteries will last 8 hours easy. when we are towing, the truck keeps the batteries charged. for cloudy weather, we use a 2000 watt generator for about 3 hours from 3pm to 5pm to charge up the batteries for night time.it is a quiet generator we keep in the bed of the truck to help keep the noise level down. I hope this answered your question.
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