There is a lot of activity these days in solar power systems for off-grid locations, using reciprocating steam engines to generate power and hot water storage systems to provide 24/7 service. A company named Terrajoule is claiming to have a modular system providing 2 mW generating capacity.
The utility of such a system however may extend to individual residences where utility power is not available.
Are there any efficient, small scale uniflow steam engines available in a capacity of 5 kW?