<p>You can install a solar hot water kit yourself to supplement your existing system and save on energy costs. The system will often pay for itself in several years.</p> <p>All photos courtesy of FAFCO.</p>
I think steam power would be a good choice. There are a couple of options for heat sources. There are other options for power, but why re-invent the wheel. Steam power is proven and has more torque for running generators than stirling engines. This design has more efficiency than tesla turbines.