I got hooked and stayed up until way too late to play this! Very interesting concept and I can't wait until release. My only wish is optimizing for fewer clicks for things like upgrade etc.
I did another playthrough on a different computer and for some reason wasn't able to ever find battery 2x2 and a few other modules despite progressing further than my first playthrough. Buying biomass seems glitched. I have multiple biomass containers yet it only allows me to fill up one, and that too seems glitched as it won't ever get filled to the limit.
Thank you for your bug report! I'll investigate the biomass-barter issues!
As for the 2x2 batteries, each POIs have their own loot-pools! between version 1.0.2 and 1.1.0 I've altered the loot-pool for POIs to favor spawning more Scrap and Carcasses. 2x2 Batteries have a spawn chance of 3% in Wrecks, and 4% in ruins...
I apologize if the balance change affected your experience!