Come to think of it, I have a Blue Sea automatic charge relay (separator) sitting on the shelf. Also a battery disconnect switch.
https://www.bluesea.com/products/761...12_24V_DC_120A
https://www.bluesea.com/products/600...y_Switch_-_Red
They are lightly used, and along with a box full of fuse holders and fuses (larger size fuse holders for power circuits).
I was just getting ready to Craigslist the whole box. $20 plus shipping if you want the whole box full.