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JPK has good advice. If you keep any lead/acid battery from getting down below 50%, you will greatly increase it's life span.
When I had our sailboat, I relied on two 8D's and three deep cycle marine batteries for the "house"; there was a seperate, isolated crank battery. I had the microwave via the inverter ran to the 3 "trolling" batteries due to the extreme load placed on them by the microwave and other high usage items. The 8D's were for all the lights, fridge/freezer, fresh water pumps, radios, etc. The 8d's would rarely get below 50% but the trolling batteries would often get to 30%....end result was the trolling batteries were toast in about two years. The 8d's lasted about 4 years.
Keep em' charged regardless of the way you go.
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1986 3.2 Carrera
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