The Official Dual Battery Thread

[Lumbergh]

[Scottman]

After a lot of research I couldn't be happier with my Blue Sea "Add A Battery" System.

Thanks to reading this thread for the suggestion...haven't had a single battery related problem since I installed it this spring.

I have one cranking battery and one deep cycle. I just turn the switch to ON when I start and OFF when I put her away at night. Then there's COMBINE if I ever needed it.

Easy installation too...any questions about it just let me know.

[Scottman]

Also wanted to say that I got a great deal on my cables at http://genuinedealz.com/

I ordered everything and had them make the cables for me. They all arrived exactly as I ordered, and I just had to hook them up. Great prices, and they made them just how I wanted them. Really couldn't be happier. I first heard of them through a post on this site, so thanks to whoever posted the link (I think it was sodar)

[Lumbergh]

What gauge are the factory battery cables on a Prostar?

[waterlogged882]

Originally Posted by Lumbergh

What gauge are the factory battery cables on a Prostar?

Four for most. Stands true for the 93 for certain.

[Philscbx]

Wow, I read up to Pg 5, and at that point I was looking at the BW R3098 relay making up dual battery set-up.

The specs don't indicate it's a latching relay. I suspect it's general purpose starting relay.
Wouldn't latching be preferred? Vs a constant draw/drain on the Batteries.

Current research - Amazon $63 - advanceautoparts - $43



Other - SD SERIES 7800

[bturner2]

Don't know the answer to your question but I can tell you I'm on my fourth season with the Blue Seas "add a battery set up" with no issues. Easy install, all parts tested/included, no questions needed or answers required. Best of all it works.

[Sodar]

Originally Posted by bturner2

Don't know the answer to your question but I can tell you I'm on my fourth season with the Blue Seas "add a battery set up" with no issues. Easy install, all parts tested/included, no questions needed or answers required. Best of all it works.

X2.... Works great!

[51timber]

Quick question on fuse sizes??? What size circuit breakers are most running from the islator to the battery for both the starter side and the house battery side??? Also if I go from a 70 amp alternator is it really necessary to change all of the associated wiring??? I have seen through this thread so many different opinions my head is spinning. What is the consensus?

[GoneBoatN]

Originally Posted by 51timber

Quick question on fuse sizes??? What size circuit breakers are most running from the islator to the battery for both the starter side and the house battery side??? Also if I go from a 70 amp alternator is it really necessary to change all of the associated wiring??? I have seen through this thread so many different opinions my head is spinning. What is the consensus?

The Blue Seas Add-A-Battery installation guide has some guideance on wire sizes and fuse sizes. There is also a URL to a calculator in those instructions that should help with wiring sizes:

https://bluesea.com/files/resources/.../990310020.pdf