Maybach 25kva Three Phase Water Cool Diesel Silent Generator

About 0.27 litres per kWh. At 20 kW load (full noise for your 25 kVA genset if it is pf) that will be about 5.4 litres per hour. This calculation isn't perfect, it will be too low at very light loads and also be too high for modern diesels over 500 kW.19 Jul 2018