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Thoughts on setup (ACR/2-Battery)

sdhurricane Member Posts: 8
I am making some upgrades to my SD 187 to include an Blue Sea ACR, Blue Sea 4-post battery SW, a NOCO 2X charger, along with 2 Optima D34M (Dual start/deep) batteries.  A wise person once told me that "if ain't broke..." You know how that goes.

My thoughts are - what worked for the previous owner does not work for me. Therefore, I decided to "update" some of which appeared to be on its way out and to address some changes with how the boat will perform, on the water and while docked.

Some info about the current setup (in case you cannot read what's on the tape) - I am upgrading from 2 Centennial D24MF that were switched by a Guest SW/without AFD.   A 15A pop breaker was hooked up to connect to the switch panel(s).  I fabricated a nice little Seaboard mount on the inside of the transom (24"Lx10"H).  I also installed a NOCO battery port to be able to connect shore power to without having to worry about running power cord outside of the hatch.

At this point I am just trying to determine the wire gauge for all endpoints as well as the associated fuse ratings.  I have a Yamaha F115 which has a 35 amp alternator from the motor.  I've added a couple of new electronics components, one of which being a stereo 1000W amp (or so they say) as well as a Simrad Cruise 7 & chartplotter.  The latter doesn't pull much but might over a long period of time.  So I set out upgrade a few things to compensate for my compensation :smile:

As I previously mentioned I am using a Blue Sea System (BSS) 5511ee (4-post) battery switch, a BSS ACR 7610, 2 Optima D34M "blue top" batteries.  The following specs for batteries - 
 - 870 MCA
 - 750 CCA
 - 55 AH
 - 120 RC

The specs for the motor are Yamaha F115, 35 amps.

I plan to use 4 AWG throughout, and use 40 AMP ANL fuses at the ACR>Batts

I have attached an image of a nominal setup with painters tape to identify what I'm connecting as well as gauged wire/Fuses.   I'd link t0 apologize for the absence of a true wire scheme.  I probably could have whipped something up in MS Paint or CAD but I figured this would do.  

If you guys have any experience with doing something similar on your boat please let me know your thought and opinions.  I've researched and have come to the conclusion that there are a more blowhards out there that are "master boat electricians" as well as DIY'rs that just want electricity to be magical for them.

Any thought would greatly be appreciated.  Thanks.



  • sdhurricane
    sdhurricane Member Posts: 8
    Update to this.  I ended up using two MAXI fuses/holders vs. the AMI (ANL wasn't correct) fuses/holders.  The MAXI fuse holders allowed for more of a clean install.  I installed the mounting board to the inside of transom along with everything else.  All is well (so far).  I also plan on changing out the OEM toggles for BSS rockers soon.