As EdMat mentioned above, I have found a smart fuse block the best option, Stephan. I’m using the Neutrino, which is pricey at around $250usd, but it has relays, adjustable ampage loads, battery tender connector, switched/unswitched power, etc etc, so you only need one pair of wires running to your battery. It is configurable via your smartphone. There are other, cheaper options of course, without all the bells and whistles.
Pete