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Old 12-06-2018, 01:19 AM   #1
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Should solar charge house or start battery side of the Blue Sea ACR?

Hello wise ones.

I have two 25Ēx30Ē solar panels and a Specialty Concept Mark 22 SCC that came with the van. Pretty sure smb west installed them. Iím unsure of how they wired it because when I replaced the house battery I didnt see wires from the SCC so I assumed the wires terminate at one of the start batteries. FYI I replaced the blue isolator with the blue sea ACR 7622.

So the Blue Sea ACR 7622 sits between my start batteries (qty 2 for my 7.3) and my house battery (Lifeline 4d agm).

1) What side of the ACR should I terminate the solar charging wires, house or start?

2) Do I have to terminate the neg wire from the solar charge controller (SCC) to the negative post of the battery or can I ground it to chassis?

3) I ask for your advice to see if itís worth the effort to yank the existing wires and run them to the house battery instead.
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Old 12-06-2018, 02:24 AM   #2
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Your solar charge controller wires are most likely located where the house fuse block is, thereís a house battery terminal or distribution block, in my RB-50 that was under the sleeper sofa.
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Old 12-06-2018, 06:50 AM   #3
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The Solar Charger should go to the house side of the ACR. I would also run a ground bus that goes directly to the battery. It is worth it to yank, and replace.

-greg
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Old 12-06-2018, 06:57 AM   #4
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Also, the previous install had an isolator so it is conceivable that they wired the positive to the alternator post of the isolator. That way they could have charged both start & house batteries. If they wired to the start batteries, it would have only charged the start batteries.
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Old 12-06-2018, 09:49 AM   #5
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Thank you for the input. Why is it important to terminate the - to the negative battery post instead of grounding to chassis?
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Old 12-06-2018, 09:53 AM   #6
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Quote:
Originally Posted by REF View Post
Your solar charge controller wires are most likely located where the house fuse block is, thereís a house battery terminal or distribution block, in my RB-50 that was under the sleeper sofa.
Not sure where it would be.

And where the neg from the SCC would be either.
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Old 12-06-2018, 11:56 AM   #7
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In 2006, SMB ran the solar + to the house side of the my separator. IIRC the solar negative was ran to the ground terminal block close to the separator. There is a separate ground from the block to a high amp post where the 4/0 negative terminates coming from the battery bank.
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Old 12-06-2018, 12:12 PM   #8
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In 2006, SMB ran the solar + to the house side of the my separator. IIRC the solar negative was ran to the ground terminal block close to the separator. There is a separate ground from the block to a high amp post where the 4/0 negative terminates coming from the battery bank.
Thanks Dave. Iíll take a closer look.
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