Current status of the battery boxes below.

Next steps: use dowels and screws to fix the walls on, insulate the interior, add the circuit breaker and terminals to the front panel (with 95mm2 wires), add the heating pad, charge the batteries a bit, put them in (tapping 3mm holes to the busbars first for active balancing and BMS monitoring), connect them to the circuit breaker then set up the central DC stuff with the shunt etc and connect to the inverters*.

* Will also require doing the new earth, finishing some cabling, getting the ATS working and fixing some wonky consumer units.

Those 4 cells took 2.44kWh for a top up.

First battery box is slowly taking shape...

Slowly making progress on my two 16kWh LiFePO4 batteries.

Any advice for better fixing the mahoosive circuit breaker would be gratefully received.

Got the cell compartment sorted with compression rods and a DIN rail to strengthen the compression and add connectivity for the BMS and active balancer. Also added the 20W heating element.

Next up is to tap M3 threads on each busbar for the BMS wires, and further compressing the battery compartment before torquing down the busbars and adding the massive 95mm2 cabling and adding the front panel. Also need to add the active balancer and set it up.

Started doing the M3 thread tapping.

First one worked fine, second one broke the drill bit. Piece of bloody junk.

I'll just use M6 ring lugs instead on the cell terminals.

Edit: No, I'll do it properly. Just bought a couple of 2.5mm drill bits and two M3 thread tappers instead of the useless all in one jobbie. I guess it'll give me time to assemble the other battery box.

Well that was a right royal pain in the bum, but all the busbars are in place with the monitoring/balancing cables all correctly connected to the distribution doodahs.

Can't find my velcro to tidy up the cabling for now.