I am installing five 12V batteries in a motorhome. The batteries will be wired in parallel for a 12V system and will be contained across three different enclosures. Each positive cable link between battery enclosures will be fused at either end, as such there will be seven fuses mounted in locations with minimal accessibility.
For this reason I would like there to be an indication light on the outside of each battery enclosure, or a remote monitoring station, to alert of a blown fuse.
I am aware that in many scenarios a 12V LED may be connected across the fuse to light up when the negative side of the fuse is no longer supplied with voltage, however as these fuses will have nominally 12V at both ends I figure this idea won't reliably work.
The solution needs to be economical and reasonably compact, while I am happy for it to be a custom made solution. I appreciate any input.