So we have a heat engine. Not exactly revolutionary (no pun intended). It's basically a Stirling engine: you give it a temperature gradient and it spins.
The idea of using solar thermal in conjunction with a heat engine isn't new either
Waste heat engine - wow!
The company is also touting the engine's ability to provide a boost to solar-power generators, with it apparently able to capture heat using inexpensive panels attached to a roof, which Cyclone says could be installed at just 20% of the cost of other systems relying on pricey photovoltaic panels.