150W Stirling Engine?

"Compared to an internal combustion engine of the same power rating, Stirling engines currently have a higher capital cost and are usually larger and heavier. However, they are more efficient than most internal combustion engines.["

"In contrast to internal combustion engines, Stirling engines have the potential to use renewable heat sources more easily, and to be quieter and more reliable with lower maintenance."

Stirling engines are more efficient than internal combustion engines:

That listing says nothing about 150 W, which is 1/5 hp. I doubt that this thing could put out 15 W, maybe 1.5 W.

It does say Wattage of 150W. Nobody believes it of course.

That's a 3 W led in the photo.

Easy start. Double power.

It also says "Compatible Control System: Motorola".

Philips achieved some astonishingly high efficiencies with their Stirling engines, as vehicle engines and as heat pumps. The articles are scattered throughout the Philips Technical Review, so they take ages to find.

If Philips' management hadn't been so bad and shut down their manufacturing and research, they would now be in a position to make a killing with all the expertise they built up.

Stirling engines are not space efficient, but fuel efficient (40% vs. 35% for diesel). Direct drive engine would not be practical. However, it would be ideal for battery charger.