1250 kVA Generators for Sale
Browse our huge range of 1250kVA generators we have for sale. We can supply, deliver and install your generator. Whether you need a standby generator for your business or a powerful diesel generator for industrial use, we’ll be able to source the perfect solution for you.Looking for different capacities? Check out our 1000kVA generators for slightly smaller projects, or explore our 1500kVA-3000kVA range for the most demanding applications. Whatever your project or requirement, get in touch with our expert team.
1250 kVA quick specifications: A 1250 kVA diesel generator gives about 1000 kW of prime power and around 1100 kW on standby. At 400V three phase it supplies roughly 1804 amps per phase. Typical fuel use is about 138 to 250 litres an hour depending on load. Sets this size suit large data centres, utilities, heavy industry, critical infrastructure and major site power systems. New prices are typically around £120,000 to £190,000 ex VAT, although engine, alternator, canopy, controls and installation affect the final quote.
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1250kVA Generators for Sale
A 1250kVA generator provides substantial power capacity for large commercial operations, industrial facilities, and critical infrastructure. These high-output diesel sets are commonly deployed in hospitals, manufacturing plants, data centres, shopping centres, hotels, and large construction projects where uninterrupted power is essential. At Generator Warehouse, we supply quality 1250kVA models from trusted manufacturers including FG Wilson, Perkins, and Cummins.
Our 1250kVA diesel generators are available in both soundproofed canopy enclosures for noise-sensitive locations and open-frame configurations for industrial sites. All units can be fitted with automatic transfer switching, remote monitoring, and synchronisation capabilities for parallel operation.
With competitive pricing, nationwide installation services, and comprehensive after-sales support, Generator Warehouse makes specifying large-scale backup power straightforward. Whether you need prime power for an off-grid facility or standby protection for mission-critical operations, our team will help you configure the right 1250kVA solution for your specific requirements.
What are the applications for a 1250 kVA generator?
A 1250 kVA generator is used in large-scale industrial operations, major hospitals, data centres, and other facilities that require a significant and reliable power supply. In industrial operations, it powers heavy machinery, production lines, and other critical equipment. Hospitals use 1250 kVA generators to ensure that life-saving medical equipment, lighting, and HVAC systems continue to function during power outages. Data centres rely on these generators to maintain server uptime and prevent data loss during grid failures. For smaller healthcare facilities or data centres, a 800kVA or 1000kVA generator may be appropriate, while the largest operations may require 1500kVA to 3000kVA generators.
How reliable is a 1250 kVA generator for continuous use?
A 1250 kVA generator is extremely reliable for continuous or prime power applications. It is built to handle heavy loads and operate for extended periods without interruption. Reliability is further enhanced by features like automatic start, remote monitoring, and advanced control systems that ensure consistent performance. Regular maintenance, including oil changes, filter replacements, and system inspections, is essential to maintain this reliability and prevent unexpected failures. These same reliability standards apply across our high-capacity range, including 900kVA and 1000kVA generators.
How much does a 1250 kVA generator cost?
Indicative new prices are commonly around £120,000 to £190,000 ex VAT. Engine and alternator brand, acoustic canopy, control panel, fuel tank, delivery, commissioning and installation can all change the final quote.
How many amps does a 1250 kVA generator supply?
At 400V three phase, a 1250 kVA generator supplies about 1804 amps per phase. This is a guide only: a qualified electrician should confirm cable, switchgear and protection sizes for the installation.
How much fuel does a 1250 kVA generator use per hour?
A diesel generator of this size typically uses about 138 to 250 litres an hour, depending on load. Treat this as a planning range rather than a model-specific figure and check the selected generator’s fuel-consumption curve for an exact estimate.
What can a 1250 kVA generator power?
This size is commonly used for large data centres, utilities, heavy industry, critical infrastructure and major site power systems. The right choice still depends on the total running load and the starting current of the largest motors or equipment.
How many kW is a 1250 kVA generator?
At standard 0.8 power factor, a 1250 kVA generator provides about 1000 kW of prime power. Standby power is typically around 1100 kW, but always compare the selected model’s published rating.