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800kVA Generator Fuel Consumption Per Hour
A 800kVA generator (about 640 kW) typically burns about 89.6 litres of diesel per hour at 50% load, 125 litres at 75% load and 173 litres at full load.
These are planning figures based on typical diesel consumption per kWh. Real consumption depends on the engine, its condition, the load profile and ambient temperature, so ask the supplier for the manufacturer's fuel curve for the exact model.
Running a generator well below half load wastes fuel and can cause wet stacking, so size the unit to your real load.
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- Capacity in kVA, and whether the load is single-phase or three-phase
- Open set, soundproof canopy or containerised
- Prime power or standby duty
- Preferred engine brand: Perkins, Cummins, FG Wilson, Mikano or other
- New or fairly used, and quantity
- Delivery location and required date
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800kVA Diesel Consumption by Load
- 50% load (about 320 kW): about 89.6 litres per hour
- 75% load (about 480 kW): about 125 litres per hour
- 100% load (about 640 kW): about 173 litres per hour
Fuel Tank Planning
- 8 hours at 75% load: about 999 litres
- 12 hours at 75% load: about 1498 litres
- 24 hours at 75% load: about 2996 litres
- Add a 10 to 15 percent reserve so the engine never runs the tank dry
Ways to Cut Fuel Cost
- Match the generator size to the real load, not the largest imaginable load
- Keep air and fuel filters clean and service on schedule
- Use an auto-mains-failure panel so the set only runs when needed
- Consider a smaller and a larger set if loads vary a lot between day and night
Frequently Asked Questions
How many litres does a 800kVA generator use in 24 hours?
At 75% load it is about 2996 litres over 24 hours. At full load it is about 4148 litres.
Does a 800kVA generator use less fuel at low load?
Yes in total litres, but it is less efficient per kWh, and very light loads can damage a diesel engine over time.
Can I get a fuel consumption chart for a specific 800kVA model?
Yes. Tell us the brand and model on WhatsApp and we will ask the supplier for the manufacturer's consumption data.
Generators in our store
Real listings with specs. Request a quote or make an offer.
NewCummins 1500 kVA Diesel Generator (New)
LagosAvailable to order
- Rating
- 1500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Enclosure
- Container
UsedCummins 1500 kVA Diesel Generator (Used)
LagosInspection on request
- Rating
- 1500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Condition
- Used
NewPerkins 500 kVA Diesel Generator (New)
LagosAvailable to order
- Rating
- 500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Enclosure
- Canopy
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