40 kVA Generators
Experience the power and versatility of Generator Warehouse’s 40kVA generator lineup, engineered for large industrial sites, data centers, and critical infrastructure. With a range of heavy-duty models featuring advanced power management systems, you’ll find the perfect solution for your demanding power requirements.
40 kVA quick specifications: A 40 kVA diesel generator gives about 32 kW of prime power and around 35 kW on standby. At 400V three phase it supplies roughly 58 amps per phase. Typical fuel use is about 4 to 8 litres an hour depending on load. Sets this size suit larger construction sites, farms, workshops, small factories and commercial backup power. New prices are typically around £7,000 to £12,000 ex VAT, although engine, alternator, canopy, controls and installation affect the final quote.
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40 kVA Generators for Sale
Experience the power and versatility of Generator Warehouse’s 40kVA generator lineup, engineered for large industrial sites, data centres, and critical infrastructure. With a range of heavy-duty models featuring advanced power management systems, you’ll find the perfect solution for your demanding power requirements.
A 40kVA generator is a reliable power solution for businesses, farms, schools, healthcare facilities, and larger homes that need consistent backup or prime power. At Generator Warehouse, we stock a wide range of 40kVA diesel generators from trusted manufacturers including Cummins, Perkins, CAT, FG Wilson, and JCB, available in both open-frame and silent enclosed canopy options to suit any environment.
Popular uses for 40kVA generators include powering commercial kitchens, offices, retail outlets, farms, workshops, construction sites, and critical systems such as refrigeration, air conditioning, IT servers, pumps, and security systems. Silent models like the Cummins C44 are perfect for residential or urban areas where noise control is essential, while open-frame sets provide a cost-effective solution for industrial or rural applications.
With the option of an Automatic Transfer Switch (ATS), a 40kVA standby generator can automatically start during a mains failure, ensuring seamless operation. Designed for fuel efficiency and long-term durability, these sets are suitable for both standby and prime power applications.
At Generator Warehouse, we not only supply quality 40kVA generators but also provide professional installation, nationwide delivery, servicing, and full after-sales support. Our expert team is here to help you find the right power solution at the best price.
Popular uses for 40kVA generators include powering commercial kitchens, offices, retail outlets, farms, workshops, construction sites, and critical systems such as refrigeration, air conditioning, IT servers, pumps, and security systems. Silent models are perfect for residential or urban areas where noise control is essential, while open-frame sets provide a cost-effective solution for industrial or rural applications.
With the option of an Automatic Transfer Switch (ATS), a 40kVA standby generator can automatically start during a mains failure, ensuring seamless operation. Designed for fuel efficiency and long-term durability, these sets are suitable for both standby and prime power applications.
At Generator Warehouse, we not only supply quality 40kVA generators but also provide professional installation, nationwide delivery, servicing, and full after-sales support. Our expert team is here to help you find the right power solution at the best price.
A 40kVA diesel generator gives you the peace of mind that your home or business will always have reliable backup power.
What industries commonly use 40 kVA generators?
40 kVA generators are commonly used across various industries, including telecommunications, manufacturing, retail, and hospitality. They provide backup power for essential operations like communication systems, production lines, refrigeration, and lighting. They are also used in educational institutions and government buildings where reliable power is critical to daily operations. Smaller operations may find a 20kVA or 30kVA generator sufficient, while larger facilities often require 60kVA or 100kVA generators.
Can a 40 kVA generator run for extended periods?
Yes, with proper maintenance and fuel supply, a 40 kVA generator can run continuously for extended periods. It’s important to monitor oil levels, coolant, and fuel supply, and to perform regular maintenance checks to prevent overheating or mechanical failure. Many models come equipped with features such as automatic shutdowns in case of overheating or low oil pressure, which helps protect the engine during long runs.
Do 40 kVA generators require special installation?
Installation of a 40 kVA generator does require some specific considerations. A stable, level base is essential to prevent vibrations and ensure smooth operation. Proper ventilation is necessary to prevent overheating and remove exhaust gases. Depending on the environment, soundproofing may also be required. Additionally, it’s important to have a certified electrician connect the generator to your building’s electrical system, often using an automatic transfer switch (ATS) to ensure seamless power transitions during an outage.
How much does a 40 kVA generator cost?
Indicative new prices are commonly around £7,000 to £12,000 ex VAT. Engine and alternator brand, acoustic canopy, control panel, fuel tank, delivery, commissioning and installation can all change the final quote.
What can a 40 kVA generator power?
This size is commonly used for larger construction sites, farms, workshops, small factories and commercial backup power. The right choice still depends on the total running load and the starting current of the largest motors or equipment.
Do you provide installation for 40kVA generators?
Yes. We offer complete installation services, including delivery, siting, cabling, and commissioning, ensuring your generator is set up correctly and safely.
Are 40kVA generators silent?
We stock both open-frame and soundproofed silent models. Silent canopy generators are designed for use in residential or built-up areas, while open-frame sets are a cost-effective choice for industrial and remote sites. Silent options are available across our full range, from 15kVA compact units to larger 200kVA and 300kVA generators.
How long can a 40kVA generator run on fuel?
Run times vary depending on the load and tank size. Typically, a 40kVA diesel generator can operate between 12–18 hours at 75% load before refuelling.
How many kW is a 40 kVA generator?
At a typical 0.8 power factor, a 40 kVA generator provides about 32 kW of prime power. Standby power is commonly around 35 kW, but the exact rating should be checked on the chosen model’s datasheet.
How many amps does a 40 kVA generator supply?
At 400V three phase, a 40 kVA generator supplies about 58 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 40 kVA generator use per hour?
A diesel generator of this size typically uses about 4 to 8 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.