How to Make a Composter for Solar Power

I grew up on a farm my dad made me work my ass off I moved to the city and I'm back on farm so it's kind of fun but I don't want to rely on electricity. One of the guys on my team that developed our water technologies also it really into bacteria soil back microbiome he suggested an actually an algae pond as an example where you can make this algae pond in like a 16 foot by 16 foot deal and the algae's produce methane. We're going to build a big composter so that I can actually take solar power off of the Sun which you know when people burn fire what is an example? "We should I could work together with if you wanted