I'm currently re-drawing the schematic for my B47 Panel 20 (the main switch and breaker panel). Part of the original drawing shows the block of fuses connected to the battery bank, see attached. I have a group of large fuses in the locker above the batteries, I've never paid them much attention other than cleaning the contacts.
I've not noticed the two 2A fuses, nor the 40A charger nor 30A heater. Can anyone confirm they are in the same cluster?