1000 kVA Generator
Equal to 800 kW. Cummins, Perkins, Baudouin & Mitsubishi engines, open and silent, with fuel use and dimensions compared.
Getting to Know 1000 kVA Generators
A 1000 kVA (1 MVA) generator is about 800 kW at a power factor of 0.8. This class serves large facilities such as factories, data centres, large hospitals and high-rise buildings.
From 1000 kVA a silent container option is also available. Where one unit is not enough, several 1000 kVA generators can be synchronized in parallel.
Suited to
- Data centres
- Factories
- Large hospitals
- High-rise buildings
- Mining
Prime or Standby?
Main power
1000 kVA prime
- The generator is the main power source, for example at a site without grid power
- It runs long hours every day with a varying load
e.g. CJPS C-1000 WP
Grid backup
1000 kVA standby
- The generator only runs during grid outages
- Prime slightly below 1000 kVA, standby around 1000 kVA: usually more economical
e.g. BJPS-900-WP
1000 kVA Generator Options
Every JERBINDO 1000 kVA model by engine brand. Select a model for full specifications.
Cummins engine
Fuel at 75% (prime): 161 L/hr5 models
| Model | Prime kVA | Standby kVA |
|---|---|---|
| CJPS C-1000 WPKTA38-G51000 kVA prime | 1000 | 1100 |
| CJPS O-1000 WP1QST30-G41000 kVA prime | 1000 | 1100 |
| CJPS O-1000 WP2KTA38-G51000 kVA prime | 1000 | 1100 |
| CJPS C-900 WPKTA38-G2A1000 kVA standby | 900 | 990 |
| CJPS O-900 WPQST30-G31000 kVA standby | 900 | 990 |
Perkins engine
Fuel at 75% (prime): 162 L/hr2 models
| Model | Prime kVA | Standby kVA |
|---|---|---|
| PJPS-1000 WP14008 TAG 21000 kVA prime | 1000 | 1100 |
| PJPS-900 WP14008-TAG1A1000 kVA standby | 900 | 990 |
Baudouin engine
1 models
| Model | Prime kVA | Standby kVA |
|---|---|---|
| BJPS-900-WP8M33G 1000/51000 kVA standby | 900 | 1000 |
Mitsubishi engine
Fuel at 75% (prime): 165 L/hr1 models
| Model | Prime kVA | Standby kVA |
|---|---|---|
| MJPS-1000S12H-PTA1000 kVA prime | 1000 | 1100 |
Generator Room Requirements
General guidance for the 1000 kVA class from engine and generator makers' installation manuals. Final figures follow the installation drawings and datasheet of the chosen unit.
- Minimum room, 1 unit
- 7.8 × 5.1 m
- Open type (L × W × H)
- 4250–4770 × 1850–2070 × 2200–2450 mm
- Silent canopy (L × W × H)
- 6100–6500 × 2250–2500 × 3100–3300 mm
Service clearance
1.5 m per side
- Leave at least about 1.5 m of clear space on every side of the generator for maintenance (Cummins' guide for units from 100 kVA; other sources give 0.9–1.2 m), plus room above it to open panels. With the largest open unit in this class, one generator needs a room of at least about 7.8 × 5.1 m.
- When installing more than one unit, leave about 2 m between generators.
- Also keep a route and door wide enough to bring the unit in and to remove large parts such as the radiator or alternator.
Ventilation
Outlet ≈ 1.5× radiator
- Provide an air inlet behind the generator and an outlet in front of the radiator. As a general guide, the outlet is about 1.5× the radiator core area and the inlet 1.5–2× (louvres cut the free area by about 25%). Keep the room no more than about 7–10 °C above outdoor air; above 40 °C the generator needs derating.
- Radiator airflow in this class is very large, so a radiator duct to the outside or a silent container outside the building is usually needed.
Foundation
≥ 2× unit weight
- A concrete foundation of at least about 2× the generator's weight, extending 150–300 mm beyond the skid on every side, with vibration isolators between the skid and the foundation. Let the concrete cure for 28 days before loading. Dry weight of the open units in this class: 8.5–9.8 tonnes.
- At this weight, the foundation and floor structure should be designed by a structural engineer.
Day tank
1290–1320 L / 8 hours
- Fuel use at 75% load: 161–165 L/hr, or about 1290–1320 L for 8 hours of running. Size the day tank from this; for longer running add a bulk tank with a transfer pump.
- NFPA 37 limits a tank inside the generator room to 2,500 L unless it has its own fire-rated room; local regulations also apply.
Exhaust
Backpressure ≤ datasheet
- A flexible connector at the engine outlet; pipework supported on its own so it does not load the engine, insulated and fitted with a rain cap. Choose the pipe and silencer so backpressure stays within the engine datasheet limit; avoid long runs and many bends. Discharge away from the air inlet.
- Large units usually use residential or critical grade silencers, with a separate exhaust run per unit when running in parallel.
Configuration
Open · Silent · Container
- Open units for a generator room; silent canopy or silent container for outdoors.
- A synchronizing panel for parallel operation of several units, including load sharing and N+1 redundancy.
Generator Projects Around 1000 kVA
Projects from our project list with units of around 1000 kVA.
Office & Commercial Buildings
Baudouin 1000 & 1250 kVA Open Type
Semarang, Central Java
Power & Utilities
Baudouin 1000 kVA Silent Type
Kolaka, Southeast Sulawesi
Manufacturing
MTU 1000 kVA Silent Type
Surabaya, East Java
Power & Utilities
Perkins 2 x 1500 & 1000 kVA Silent Type
North Barito, Central Kalimantan
Office & Commercial Buildings
Perkins 3 x 1000 kVA Open Type
Surabaya, East Java
Office & Commercial Buildings
Perkins 2 x 1500 & 1000 kVA Open Type
Tanah Bumbu, South Kalimantan
Frequently Asked Questions
How much does a 1000 kVA generator cost?
The price of a 1000 kVA generator depends on the engine brand, the configuration (open type, silent canopy, silent container), an ATS/AMF or synchronizing panel, installation and commissioning, the delivery location, and the warranty and after-sales service. Use Request a Quote with your requirements and our sales team will send a quotation.
How many kW is a 1000 kVA generator?
At the 0.8 power factor commonly used for generators, 1000 kVA equals 800 kW. The exact kW of each model is on its specification page.
How much diesel does a 1000 kVA generator use?
At 75% load, the 1000 kVA prime generators in our catalogue use about 161–165 L/hr, depending on the engine brand and model. Fuel use at 50% and 100% load is on each model's page.
Should I choose 1000 kVA prime or standby?
Choose a 1000 kVA prime model if the generator is the main power source or runs long hours with a varying load. If you need 1000 kVA only as backup during grid outages, a model with a 1000 kVA standby rating (and a slightly lower prime rating) is usually enough and more economical.
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