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Old 02-24-2016, 06:01 PM   #15
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Originally Posted by 73shark View Post
But it looks like the BIM should switch to the chassis battery when it drops below the house batteries. (I think that's the way it works)
Doesn't on mine. A mere 50w of solar alone isn't enough of a charging source to trigger the BIM.
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Old 02-24-2016, 06:44 PM   #16
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Somehow it does on mine.
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Old 02-24-2016, 07:26 PM   #17
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But it looks like the BIM should switch to the chassis battery when it drops below the house batteries. (I think that's the way it works)
The BIM will only connect the 2 battery banks when one battery falls below the pre-set low voltage point………...AND……….. there is a charging source present. It will not (or SHOULD NOT) connect the 2 banks with no charging source operating.

The charging source could be the vehicle alternator, generator, solar or shore power.
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Old 02-24-2016, 08:47 PM   #18
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The BIM will only connect the 2 battery banks when one battery falls below the pre-set low voltage point………...AND……….. there is a charging source present. It will not (or SHOULD NOT) connect the 2 banks with no charging source operating.

The charging source could be the vehicle alternator, generator, solar or shore power.
So in Protag's case, something must be wrong if the solar keeps the house batteries charged but not the chassis battery?
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Old 02-24-2016, 11:05 PM   #19
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Do you have to disconnect everything from the battery to use the trickle charger? My experience with trickle chargers is limited to car batteries.
No, it won't hurt a thing. But I would turn the battery disconnect to OFF just the same as there is no reason not do, and turn the Tripplite to OFF as well. I ran two wires to the battery posts-one positive and negative, to the rear bumper, spliced in to one of the battery tender's push-together connectors, and simply plugged them in, and then plugged the battery tender into AC. I kept it this way 24/7 when stored.

No more worry. I just unplugged it when I was ready to roll. I used the same connector to plug in a portable solar as well on occasion to boost the solar charge while boon-docking.
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Old 02-25-2016, 06:59 AM   #20
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So in Protag's case, something must be wrong if the solar keeps the house batteries charged but not the chassis battery?
Not necessarily. His solar might not have sufficient output to signal the solenoid to close and link the batteries……definitely no where near that of an alternator or other charging source.

Also, I don't believe that the earlier Interstates used the Precision Circuits BIM, but rather a battery separator from Sure Power which has a different modus operandi.

Perhaps Protag could jump in and clarify which device he has……...
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