The world needs a new source of energy, an unspillable source.

Where can I find steam engines and /or generators for home use? I?

I hope to create a solar/ steam residential power station. My idea involved fresnel lenses to focus heat on water as well as molten salt for possible overnight use. The salt and water boilers, so to speak, can be made with refractive propertied ceramics, or so I am informed. Any technical advice or a line on generators , steam engine sources would be great.