Fuse Protection for House Bank

H33CRich

H33CRich

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Sep 26, 2011
228
Hunter 33_77-83 Cedar Creek Sailing Center, NJ
Maine Sail
I have 4 new 6 volt EGC2 batteries from SamsClub (thanks for the tip) and want to addequately protect the bank. I bought 2 Mega Fuse blocks with 225 Amp fuses and planned to put each pair behind its own fuse. However, it now seems a little bit of an over kill. I could connect each pair's positive to the battery side of one fuse. (see diagram for more clarification I hope). Is this a good or bad practice?

Also, the boat came with a ProMariner 1215i battery charger. Since I've upped the house capacity, will this still do the job? I also plan on installing a Kyocera 135/140 W solar panel (will expand to two panels eventually) with a SunSaver Dual 25 Amp Solar charge controller http://www.solar-electric.com/modubachco25.html.

Thanks in advance.
 

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Dantodd

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Mar 14, 2012
131
Beneteau Oceanis 40CC Brisbane, CA
I think the usual practice is to run the batteries in parallel as a single bank. This would eliminate the need for the battery isolator and you would only need to fuse the terminal that feeds the boat. If you keep them as separate banks through separate switches you should have them each fused.

Are you using an MRBF fuse block?
 
H33CRich

H33CRich

.
Sep 26, 2011
228
Hunter 33_77-83 Cedar Creek Sailing Center, NJ
Unfortunately not MRBF. I have two Blue Sea (5001) Mega fuse blocks. The fuse blocks are between the battery and switch. The question is; should I use one (positive leads from each battery pair coming to one block) or two (each battery positive lead going to its own fuse block)?
 
Maine Sail

Maine Sail

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Feb 6, 1998
11,709
Canadian Sailcraft 36T Casco Bay, ME
H33CRich said:
Unfortunately not MRBF. I have two Blue Sea (5001) Mega fuse blocks. The fuse blocks are between the battery and switch. The question is; should I use one (positive leads from each battery pair coming to one block) or two (each battery positive lead going to its own fuse block)?
Click to expand
Just put a short jumper across the + of the two strings then take one 1GA feed to your buss bar and fuse it within 7" or so of the battery.
 
Stu Jackson

Stu Jackson

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Feb 26, 2004
23,047
Catalina 34 224 Maple Bay, BC, Canada
How old is your charger? Our C34 group has had very, very bad experiences with them, like they catch fire sometimes. Really.

Let us know, 'cuz if it's an old Promariner, you really wanna diss it.
 
H33CRich

H33CRich

.
Sep 26, 2011
228
Hunter 33_77-83 Cedar Creek Sailing Center, NJ
That is what I was thinking as well. Thanks for the confirmation.

As for the ProMariner 1215i? I will have to look for the manufacture date. It was installed by the PO and I am not sure about anything on the boat.
 
Maine Sail

Maine Sail

.
Feb 6, 1998
11,709
Canadian Sailcraft 36T Casco Bay, ME
Stu Jackson said:
How old is your charger? Our C34 group has had very, very bad experiences with them, like they catch fire sometimes. Really.

Let us know, 'cuz if it's an old Promariner, you really wanna diss it.
Click to expand
The ProTech 1215i is NOT a Flyback or "Fryback".. They are good chargers and are still current...

I'd put in a ProTech long before an "X".....;)
 
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