2MW Cummins use about 130 gallons/hour at max load.
At 1/4, about 34 gallons/hour.
You can't idle them at low loads for long periods without damaging them. That's basically 1/4. You usually want it to be more like 50-75%. So "no real load" is artificially set higher than engine idle to keep the system functional, using a load bank. (what you actually do is have N generators and just use some of them, or have different sizes and use the right ones to sort of match the load)
The output from the generators is going into the UPS. The UPS input is probably pickier than any switchmode power supply. Especially because most big UPSes let you set in software how picky they are about input power before they switch to battery, and they apparently had it set to conservative mode.
At 1/4, about 34 gallons/hour.
You can't idle them at low loads for long periods without damaging them. That's basically 1/4. You usually want it to be more like 50-75%. So "no real load" is artificially set higher than engine idle to keep the system functional, using a load bank. (what you actually do is have N generators and just use some of them, or have different sizes and use the right ones to sort of match the load)
The output from the generators is going into the UPS. The UPS input is probably pickier than any switchmode power supply. Especially because most big UPSes let you set in software how picky they are about input power before they switch to battery, and they apparently had it set to conservative mode.