I found a good blog article about a system just like you are considering:
https://elkement.blog/2016/01/07/how...ystem-that-is/
Totally custom and self-built by a couple of engineering professional hackers. These 2 have gone down the road that many people avoid and a few have explored briefly. I have no doubt about the theory and synergy of the type of system that they have commissioned and the small amount of energy required to run it. However, reading about time tested operation in reality is quite another matter. This type of information is usually kept under lock and key by those who would seek to exploit it. Happy reading!