Centauro, fuse blowing

Went to fire up the centauro after the winter lay up, dead battery, (wouldn’t take a charge), fired up with the jump leads, put a new battery on today and the 2nd fuse from the front blew… fresh fuse in and pop, the manual I have describes it as the “electronic box”…
Anyone know what the “electronic box” is?
I’m guessing that it’s the ecu.
Cheers Phil