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Old 11-03-2017, 07:27 PM   #1
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Battery Life Benchmark

We left our trailer at Palmetto Cove between Alumalina and GMA Fall Rally. We left PC on Sunday with the trailer in USE mode but only the refrigerator on as we did not want to take all the cold food with us. We returned today after 5-1/2 days. The battery indicator was still at maximum and the batteries worked the tongue jack as well as when they are fully charged.

I wish I had a DVM with me to make a better measurement, but I didn't. I thought everything would be OK, but I expected the level indicator to be down some. The top bar is supposed to be 12 volts and the next bar down is 11.

I have Group 27 Interstate deep cycle lead acid batteries.

Al
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Old 11-03-2017, 08:51 PM   #2
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Originally Posted by Al and Missy View Post
We left our trailer at Palmetto Cove between Alumalina and GMA Fall Rally. We left PC on Sunday with the trailer in USE mode but only the refrigerator on as we did not want to take all the cold food with us. We returned today after 5-1/2 days. The battery indicator was still at maximum and the batteries worked the tongue jack as well as when they are fully charged.

I wish I had a DVM with me to make a better measurement, but I didn't. I thought everything would be OK, but I expected the level indicator to be down some. The top bar is supposed to be 12 volts and the next bar down is 11.

I have Group 27 Interstate deep cycle lead acid batteries.

Al
Glad it all worked out. Actually a fully charged 12v lead acid battery should read 12.7v. I would expect the top bar in your indicator to be 12.7.
You don’t want it to go below 12v or the batteries will be damaged. Don’t ask how I know this😱
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Old 11-03-2017, 09:36 PM   #3
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Was your fridge on LP or auto? Not much DC power needed to ignite and it should auto switch over. I wouldn't expect more than 10-15% self discharge over a month of storage unless you have other parasitic loads . LP and CO are negligible but will eventually bring your batteries down but won't do much in 5 days.
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