First 48V Battery bank connections

This feels like a whole set of big bits of progress.

Hundreds of Busbars

I've spent a couple more days making Busbars, these are what the battery banks and big items connect to. Each battery bank needs a +ve and a -ve busbar. The motor bank needs an extra 2 busbars as these connect the two strings of 2 batteries in parallel to make one bank. That means 10 busbars in total, however, the 4 for the motor are doubled to handle the higher current.

48V Booster battery bank

This afternoon, I have fitted the first two busbars for the 48V Booster Bank and I have started wiring the batteries together. This has created a huge mess, so when Jane got back from working on the wheelhouse cover there was no companionway steps to get in. Cooking dinner (and finding somewhere to eat it was also a challenge).

The fuse (holder is in the last picture) is a 110A T-Class (the safest kind for high currents). I'm using 70mm2 wire which is rated to 485A for a battery that can deliver less than 150A. The maximum current is going to be well under 60A as there are only 2 sets of solar panels (about 360watts maximum) and the two MPPT's max at 48V, 10A. The only current draw will be a DC to DC charger that can be used to charge the Main battery bank from this.

Hopefully we will finish wiring this bank tonight or tomorrow (At the moment, I can't find the second waterproof gland for the battery box exit (looking for it is partly what created all the mess).