45kg of lead-acid awesomeness, this project ended up a bit heavier than expected but has given good service for 18 months so far! Based on off-the-shelf modules: a 1kW pure sine wave inverter, Victron MPPT charge controller, and 12V 100Ah AGM lead-acid battery, all mounted in a large army surplus ammo box of some kind.
https://connerlabs.org/tag/powertank/ see all posts about the Power Tank here