Behind the scenes on a big power system install

Just wrapped a full Victron system install — 400Ah lithium bank, 3000W inverter/charger, and a full rewire of the DC distribution since the existing wiring wasn't sized for the new load. The part that always takes longer than people expect isn't the 'exciting' parts (mounting the inverter, wiring the battery) — it's properly sizing and running new wire runs to handle the increased current safely. Happy to answer questions if anyone's planning something similar.