From the new solar/charger system was planning to run 6ga + and - wires right to the battery terminals, not tied in anywhere to the existing trailer wiring. Was thinking about using a Blue Sea 5191 Terminal Fuse Block & Fuse right at the + battery terminal (in addition to the breaker & internal protections at the other end of the wire). Fuse BlockI think the existing trailer wiring has a fuse about 4' from the battery just inside the trailer in its floor space. Although that space is very well protected and dry, it would be difficult for me to route my new 6ga wires to it. My battery boxes are just the standard, outside, plastic ones. Am hoping that with regular terminal cleaning, the 5191 Fuse Block at the batteries will work ok.Any experience out there with a similar setup? Thoughts? I'm assuming that the closer to the battery the better ...

Best practices is to locate the fuse within 18" of the battery. I just bolted a fuse onto the (+) terminal of the battery and bolted the wire lug onto the fuse. I have the (+) battery wire supported so that there is no movement. Curious: How far is the charge controller from the batteries?

westend wrote:Best practices is to locate the fuse within 18" of the battery. I just bolted a fuse onto the (+) terminal of the battery and bolted the wire lug onto the fuse. I have the (+) battery wire supported so that there is no movement. Curious: How far is the charge controller from the batteries?Hmm, that sounds like a really good & cheap solution. What type of fuse can you bolt to the battery? Do you have a picture? I'm estimating max 10' run there and 10' back, but I haven't placed the MPPT or run the cables yet, so could be less. With 6ga wire the Voltage drop should be <2% for the MPPT currents. The PD9260 will use the same wires, and its current could be higher, up to 60A I guess; it will have more voltage drop then. Will want the fuse to be 60A for it.

brulaz wrote:Hmm, that sounds like a really good & cheap solution. What type of fuse can you bolt to the battery? Do you have a picture? MRBF Terminal Fuse Block

BoonHauler wrote:MRBF Terminal Fuse Block Good find!! Wish I could use that.

On-battery fuse by Bluesea is the easiest and closest to battery. Not cheap. Check Amazon, I think I paid $25 for a single block and $18 for a fuse. You don't need a double block if this is only for a battery fuse.

Battery Fuse for Solar/Charger System | Good Sam Community

15 Replies

Almot
Explorer III
May 11, 2014
On-battery fuse by Bluesea is the easiest and closest to battery. Not cheap. Check Amazon, I think I paid $25 for a single block and $18 for a fuse. You don't need a double block if this is only for a battery fuse.
mena661
Explorer
May 11, 2014
BoonHauler wrote:

MRBF Terminal Fuse Block
Good find!! Wish I could use that.
BoonHauler
Explorer
May 11, 2014
brulaz wrote:

Hmm, that sounds like a really good & cheap solution. What type of fuse can you bolt to the battery? Do you have a picture?

MRBF Terminal Fuse Block
brulaz
Explorer
May 11, 2014
westend wrote:
Best practices is to locate the fuse within 18" of the battery. I just bolted a fuse onto the (+) terminal of the battery and bolted the wire lug onto the fuse. I have the (+) battery wire supported so that there is no movement.

Curious: How far is the charge controller from the batteries?

Hmm, that sounds like a really good & cheap solution. What type of fuse can you bolt to the battery? Do you have a picture?

I'm estimating max 10' run there and 10' back, but I haven't placed the MPPT or run the cables yet, so could be less. With 6ga wire the Voltage drop should be <2% for the MPPT currents.

The PD9260 will use the same wires, and its current could be higher, up to 60A I guess; it will have more voltage drop then. Will want the fuse to be 60A for it.
westend
Explorer
May 11, 2014
Best practices is to locate the fuse within 18" of the battery. I just bolted a fuse onto the (+) terminal of the battery and bolted the wire lug onto the fuse. I have the (+) battery wire supported so that there is no movement.

Curious: How far is the charge controller from the batteries?

Forum Discussion

Battery Fuse for Solar/Charger System

15 Replies

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