Find the family.
Then the exact fit.

6.8 kW–5.72 MW marketed set range; 50/60 Hz; LV standard and MV alternator options

10 kW–15 MW per set/engine family; lean-burn and rich-burn; 50/60 Hz

50 kW–4.5 MW per genset typical; landfill, digester and sewage gas variants

50 kW–15 MW class depending reciprocating/turbine package; allowable H2 blend must be stated

500 kW–18 MW class; gas with diesel pilot or switchable gas/diesel systems

6.8 kW–5.72 MW diesel platform range where OEM approves HVO fuel

20 kVA–2.5 MVA common container module; parallel packages scale to tens of MW

10 kW–4 MW common standby band; hospitals/data centres often 500 kW–4 MW per set

10 kW–5 MW common per-set range; annual-hour limits and load factor must be quoted

50 kW–15 MW depending diesel/gas engine; constant or variable load rating

500 kW–4 MW per set common; LV/MV; N+1/N+2 parallel fleets

100 kW–3 MW per set common; fast ATS, fuel autonomy and NFPA/local compliance central

5–500 kVA; open, silent, weatherproof, DC-hybrid and remote-start variants

50 kW–5 MW; 400/440/690 V or 3.3/6.6/11 kV; class-approved and resilient mounting