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Old 12-13-2019, 07:43 PM   #1
Join Date: Jul 2019
Posts: 78
Drain the bank

I always wondered what the drain on my battery bank was.

I have The following setup:
2012 Bounder 35k
2 Interstate Extreme 6v batteries (232 ah)
Magnum MM1212 inverter/charger

I purchased an AiLi Battery monitor with 350 amp shunt. Nice simple monitor for $40.

With fully charged batteries it shows almost a full 1 amp draw with just the switches on. With them off it drops to a tenth of that. Guess thatís what explains the batteries going dead if switches are left on for a week or so.
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Old 12-14-2019, 04:45 PM   #2
Senior Member
Join Date: May 2010
Location: N.E. Florida
Posts: 1,084
Best practice IMHO is to turn the disconnects OFF when leaving the coach in storage.

That is what we have done for the last 10+ years and we have had no issues.

Your device shows the WHY of leaving the disconnects OFF when away from the coach.

Thanks for sharing!

1998 American Eagle 40EVS
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Old 12-15-2019, 02:27 PM   #3
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Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Jan 2011
Location: Prospect, KY
Posts: 107
where did you buy the monitor from?
2009 Fleetwood PaceArrow 38P 8.1 on W24 chassis, 1990 Goldwing 1500
2 dogs, 6 cats
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Old 12-16-2019, 03:34 AM   #4
Join Date: Jul 2019
Posts: 78
Amazon. I recommend getting the larger shunt (350 amp) as it is only a couple $$$ more. You will need a 2 1/8 hole saw for a perfect fit.
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Old 12-17-2019, 02:01 AM   #5
Join Date: Jul 2019
Posts: 78
Did a quick test to see what a typical load pulls.
With the Magnum MM1212 on, Wally on, and 32in Sony Tv on it pulls 9.6 amps. That only 116 watts which it pretty good!
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Old 12-18-2019, 11:08 PM   #6
Join Date: Jul 2019
Posts: 78
AiLi with only a 100amp shunt vs 350amp shunt

If you decide to get the AiLi Monitor you should consider getting the 350amp shunt even if you donít need one that big.

The 100amp shunt comes with a 3ft wire for monitor compared to the 6ft wire on the 350amp version. Also the 100 amp version does not have the plastic mount for the shunt and there are no holes in the shunt, so it cannot easily be mounted to a wall/board.

I just completed the 100amp install on a friend camper. We had to extend the monitor cable and came up a great solution. We cut the provided cable wire in half. Then crimped on Cat6 ends on the cables. We then bought 2 Cat6 couplers and plugged one on each end. Then bought a Cat6 cable of the length we needed and plugged into couplers. Worked great and was simple.

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