Fusing Battery Strings? HELP PLEASE! -ANYONE???
New to the forum!
Hoping to find some help here with my current project.
I have 12 - 12 volt FLA batteries hooked up in 3 strings of 4 batteries each and then paralleled to get 48 volt battery bank.
Below are the batteries I am using.
I am searching for the best fusing option and install for each of the 3 strings of batteries in my battery bank.
I have found a number of different products but am not sure as to the best way to go and so I am here.....
I have read that fuses should be no more than 7" from the battery string being fused. Is this best practice?
I found these buss bars which seem just fine for positive/ negative bus bars? Is this the best choice for bus bars or is this overkill?
Or would these be fine?
I read in my charge controller manual page 2-22 in the event of a Ground Fault and the fuse in the Charge controller blows that the aux. output of the charge controller and battery cable connections can be subject to high voltage and as such should be rated for min. 300V (AC rating I am assuming)
It is for this reason that I am wondering if all my battery connections and fuses be rated for min 300V as well?
I found this Blue Sea product that seems to both act as a bus bar and fuses each of my 3 battery strings in one shot. Perfect I thought, until I see that it is only rated for 58VDC max. It is possible that I will equalize at 64 VDC and the fact that my charge controller manual is calling for min 300V rating, will this product not be the best for this application or is in fine?
Then I find that it is best to keep the battery string fuses within 7 wire inches from the battery string so once again I am thinking this product will not be the best?
So I find these types of fuses:
but the bolt for the cable lug is 5/16" and not 3/8" like I need?
Also, what is the best method to use for calculating fuse size for each battery string? I am told 200 amp fuse will be fine but want to be sure.
I am using a Schneider XW+ 6848 than can surge up to 12000watts for 30 secs. I am using 4/0 cable everywhere - for battery inter-connects and right back to the inverter.
Sorry to ask so much on my first post. I hope to be able to help others once I get my situation all sorted out!
Thanks in advance for help and support.