Here is a idea what the 'DIY powerwall' for this solar porch is looking like. The AC and non-battery DC wiring is completed, all 10awg stranded thhn building wire, no lamp cord. the picture shows the purpose of the items i used. Right now, i think that i could direct solar charge the leaf, but it would switch to Edison power when a cloud came in front of the panels. one idea that worked well was how i did the cable tray on the bottom. they don't sell real cable trays at my local hardware store so i made one out of 6x 3/4" knock out handy-boxes, this is needed to keep the fan inlets free for airflow and the little conduit pieces are so close to the inverter and Xfer switch its little-finger safe. the load center is 220v only and has breakers for the EVSE, the 1-ton minisplit and a 7.5KVA 240/120 transformer, but those last two items are not bought yet, car charging comes first!https://ibb.co/CmtZbw0
The battery is still a work in progress, 286x of the the LiFePo4 battery cells came in, still waiting on a few more, the 120a BMS, and cell level fuses too. i was thinking that i would encase the battery in 4x large ammo cans, that way 3 of the ammo cans are a useful 12v 4s size and the 4th one which is 3s can hold the BMS. the plan is 32p 15s overall, 208AH capacity and 120amp max discharge.