Battery Fuse for Solar/Charger System
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 519...
Forum Discussion
brulaz wrote: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.
I used this CB Mega fuse for my battery main fuse and have it somewhat undersized so that I'm sure it will interrupt should I have a short in the main wires. I have the converter, inverter, and charge controller fused separately in buss boxes.
Like others, I'd recommend the use of 4AWG instead of 6AWG. My take is that it makes no sense to give up power by trying to save a few bucks on wire. If the terminals on your charge controller only support the smaller 6 ga. terminals, there are aftermarket lugs that will mate to 4 ga. and have a smaller spade connector.
