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Old 03-05-2015, 12:50 PM   #15
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Well some better news. Dry-camped last night, no shore power. Batteries started at their full charge, A bit of television and then bed time. Furnace cycled during the night about every 20-25 minutes. This morning the voltage was 12.4. That voltage was higher than the previous measurements after just 2-3 hours of furnace time of 11.9-12.1. I figure that everyone benefits from exercise, even batteries. Thanks to all those that have been walking me through all of this.

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Old 03-07-2015, 06:51 AM   #16
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Check my post on 12 volt problems. Might be the battery control center and not your batteries.

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Old 03-07-2015, 12:32 PM   #17
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One thing. Group 31s are about 130 amp hours, so 40 amps PER BATTERY is the max charge rate.. Your 9260 would thus be a good charger for 2 of them, tad small for 3. (try an 80).

Still after 24 horus should be full up.. I think it is just new battery not yet up to full capacity.
Home is where I park it!
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Old 03-07-2015, 06:53 PM   #18
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Batteries in float service take about 6 months to settle in.

We used a test that uses float capacity to quickly test batteries and the test would respond poorly until about 6 months in service.

Your non consistant sg testing shows some cells worse than others and if one equalized or just floated the batteries for some time the sg may get better.

Go on your trip and retest when you are done to see if they improve.
Tony & Lori
1989 Country Coach Savannah SE
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Old 03-08-2015, 12:36 PM   #19
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Our pair of GC2 total about 220 Ah, will run a Suburban 30m at a 50% duty cycle all night a still be at 70% in the morning.

I suspect that you either have a heater that is drawing more power than it should. (or something you haven't found is) Or, you one of your new batteries is not doing all that well.

Good Luck

A lifelong waterman and his bride going dry places for as long as the fuel money lasts.
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Old 03-08-2015, 01:17 PM   #20
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In addition to the furnace you have the water heater, Fridge, Propane/Explosive gas Detector (and possibly control valve) possibly other detectors. And perhaps a radio or other remote controlled device,, This all assumes you do NOT have an inverter.
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Old 03-08-2015, 02:56 PM   #21
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I just ran my furnace overnight on 3 31's and was reading 12.6 in the morning. Not super cold but it ran regularly. I was very happy since I just upgraded my batteries. Plenty of power to start the generator in the morning.

1997 Tiffen Allegro Bus 37', Cat 3126

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