Bill did the design and installed all the systems; his day job is a company that has developed a hybrid propulsion system for boats that is worthy of a post of its own, and he has applied the technology here. Some tech notes:
I've found that a conventional charge controller works better than an MPPT-type controller for charging the LiFePO4 battery bank. The fancier controllers are "too smart by half" for the simpler charge curve of Lithium. Of course all of this is controlled and managed by our Hybrid Propulsion BMS system and load balancing.