Dual battery solenoid options

[Cruisertrash]

What is a measure and defining of topped off?

100%. I put MRBF Terminal Fuses (Blue Sea or Bussman brand) on the battery at each end of the long run from engine bay to under Longcruiser rear seats. My short runs between batteries under the long cruiser rear seats are in PET Expandable Braided Sleeving inside flexible wire loom. I have a MRBF Terminal Fuse at the battery end of the long run from my other 80's cable (2 or 4 ga I think) from engine bay to ARB twin compressor in the cargo area. This is not because I anticipate heavy loads. This is to protect the wires from ground shorts.

12.6VDC

 

[MDH33]

Thanks for all the replies and info, great stuff!

Following up, I had a road trip planned last week and needed it working to power my fridge and radios. I pulled the solenoid and connected everything direct and when I put a volt meter on the aux battery I was getting a weird intermittent, fluctuating charge. I started going through the wires and terminals and found that one of the big 100A midi fuses was bad. Looked OK and wasn't evident it was blown, but once I removed it, it literally fell apart. I picked up some better blue sea fuse holders and new fuses, replaced the wire end connectors and reinstalled the solenoid and it worked flawlessly on my 1000 mile road trip up to the North Shore. I should've started with the easy stuff rather than assuming the solenoid was bad, but the symptoms were odd. Anyway all set and now I have good references for future upgrades.

 

[Inukshuk]

Cool!
Yes, bad fuses do wired things!