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Old 07-20-2014, 07:25 PM   #11
Join Date: Jan 2013
Location: Marietta, GA
Posts: 91
My 21FBRS has a factory battery shut-off. To find out if you have one, disconnect the shore power and turn on lights. If a light comes on look by the electrical panel for a switch. On a 21 FBRS its a pull/push switch below the fridge. If you can use the switch and turn off lights, you have a battery isolation switch. On my old Sunline I installed one.

IBEW LU 613 Atlanta
Micro Lite 21 FBRS
Toyota Tundra
SparkeyBob is offline   Reply With Quote
Old 07-22-2014, 11:11 AM   #12
Junior Member
Join Date: Jun 2011
Posts: 24
Factory shore power charging will overcharge and dry the batteries. Tender is a much better choice. IMHO

pnwbrg is offline   Reply With Quote


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