Yanmar just sent us this new three-cylinder 1800 RPM engine. "It's so small!" With 8.8 kW of power at the flywheel and small pancake alternators considering the total efficiencies, we will have 6-8 kW of electrical power for small generator sets.
Yanmar Specifications can be found here
https://www.yanmar.com/us/product/3tnm74f-ngge/