It should be noted than 25kW is 33HP. But the design obviously isn't limited to this? A bigger engine could give more power yet still consume less than a regul

It should be noted than 25kW is 33HP. But the design obviously isn't limited to this? A bigger engine could give more power yet still consume less than a regular piston engine. Or 1-2 of these running in parallel, depending on the load.