I’ve built my own packs, Victron systems in the past. This time I went with a Delta Pro Ultra with 5x expansion batteries for 30kWh of LifePO4 for a drop in system.
The big downside for me is lack of native integration with Home Assistant for automation, power tracking, etc, however, it seems there are 3rd party hacks out here, such as:
https://github.com/rabits/ha-ef-ble
For solar I’m running a DIYVans rack:
4 of these fit perfect for 1,200W of solar:
https://www.bougerv.com/products/300w-12bb-mono-bifaical-solar-panel
Daily power generation should be around 5kWh a day.
For backup power, I’m using a Honda EU3200i, which has 2,600W running watts:
I wanted something quiet most of all, it works well! Generates about 8kWh per tank of fuel. Only downside is using a rubber belt for the valves, which was stupid of Honda.
The travel trailer I’ll be pulling has 800W of solar and ~13.8kWh if LifePO4, with a Victron setup
The Travel Trailer plugs into the Van for a total of 43.8kWh and 2,000W of solar.
Air conditioning is the major power draw. I’ll go deeper into these systems later
Little Lifeboat 
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