15 kVA Generators
Discover our wide collection of 15kVA generators at Generator Warehouse, perfect for medium-sized businesses, residential complexes, and community events. Each generator combines strong performance with energy efficiency and comes in a compact design that easily fits your specific requirements. Whether you’re powering up a small workshop with one of our portable generators or ensuring a neighbourhood gathering goes off without a hitch, we have the ideal power solution for you.Need a different size? Our 10kVA generators work brilliantly for smaller setups, whilst our 20kVA generators provide extra capacity when you need it. Explore our full range of small generators to find your perfect match.
15 kVA quick specifications: A 15 kVA diesel generator gives about 12 kW of usable power at prime rating and around 13 kW on standby. On a 400V three phase supply that is roughly 22 amps per phase. Typical fuel use is about 2 to 3 litres an hour depending on load. Sets this size suit small sites, shops, offices, homes and outdoor events, running lighting, power tools, tills, refrigeration and heating. New prices are typically around £4,000 to £9,000 ex VAT depending on brand and specification, and most are built to order, so enquire for a firm quote.
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15kVA Generators for Sale
Discover our wide collection of 15kVA generators at Generator Warehouse, perfect for medium-sized businesses, residential complexes, and community events. Each generator combines strong performance with energy efficiency and comes in a compact design that easily fits your specific requirements. Whether you’re powering up a small workshop or ensuring a neighbourhood gathering goes off without a hitch, we have the ideal power solution for you.
A 15kVA generator is one of the most popular sizes for both home and business backup power. Compact yet powerful, these generators are trusted across the UK for their ability to provide a reliable supply of electricity when mains power fails. At Generator Warehouse, we stock a wide range of 15kVA diesel generators from leading brands, available in both open and silent (enclosed) models.
Popular uses for 15kVA generators include powering small to medium-sized businesses, retail shops, restaurants, construction sites, farms, and larger homes. They can comfortably run essential systems such as lighting, refrigeration, heating and cooling, IT servers, office equipment, and security systems. With the option of an Automatic Transfer Switch (ATS), a 15kVA generator can even switch on automatically during a power cut, minimising disruption.
Built for efficiency and durability, 15kVA diesel generators are well-suited for both standby and prime power applications. Silent models like the SDMO Diesel 15000TE Silence are designed for noise-sensitive environments, while open frame sets are a cost-effective choice for industrial sites where sound levels are less of a concern.
At Generator Warehouse, we not only supply 15kVA generators but also offer professional installation, nationwide delivery, servicing, and full after-sales support. Whether you need a generator for emergency backup with a 250A ATS panel, regular site use, or continuous operation, our team can guide you to the best solution at a competitive price.
Investing in a 15kVA generator gives you peace of mind that your power supply is secure—whatever the situation.
Is a 15 kVA generator suitable for construction sites?
Yes, a 15 kVA generator is well-suited for small to medium-sized construction sites. It can power tools such as drills, saws, compressors, and small machinery, as well as temporary lighting and office cabins. Its portability and relatively low fuel consumption make it an excellent choice for sites where grid power is unavailable or unreliable. For larger construction projects with heavier equipment, a 30kVA or 50kVA generator may be more appropriate.
What fuel types are available for 15 kVA generators?
15 kVA generators are typically available in diesel, petrol, and gas variants. Diesel is the most common choice due to its fuel efficiency and longer lifespan, making it ideal for continuous use. Petrol generators are often more affordable but are less fuel-efficient for long-term use. Gas generators are cleaner but require access to a gas supply, making them less portable.
How much space does a 15 kVA generator require?
A 15 kVA generator typically requires around 1.5 to 2 square meters of space, including clearance for ventilation and maintenance. Proper installation should also consider factors such as soundproofing, proximity to the main electrical system, and access for fuel delivery. Ensuring adequate space helps maintain efficiency and prolongs the generator’s lifespan.
How much does a 15 kVA generator cost?
New sets this size typically run about £4,000 to £9,000 ex VAT, depending on engine brand, canopy and options such as a transfer switch. Most are built to order, so enquire for a firm quote.
What can a 15 kVA generator power?
It powers small sites, shops, offices, homes and outdoor events, running lighting, power tools, tills, refrigeration and heating, delivering about 12 kW of continuous power for that duty.
Do you offer installation services for 15kVA generators?
Yes. Generator Warehouse can arrange professional installation services, including delivery, siting, cabling, and commissioning. We ensure your generator is fully set up, tested, and ready to provide reliable backup power when needed.
Are your 15kVA generators silent?
We offer both open and soundproofed (canopied) models. If noise is a concern, we recommend a silent enclosed generator which is designed for residential or built-up areas. Silent options are available across our range, from compact units to larger 100kVA and 200kVA generators.
Can a 15kVA generator be connected automatically during a power cut?
How many kW is a 15 kVA generator?
About 12 kW at prime rating. Multiply the kVA by a 0.8 power factor, so 15 becomes roughly 12 kW, with about 13 kW available on standby.
How many amps does a 15 kVA generator give?
Around 22 amps per phase on a 400V three phase supply. These sizes come in single or three phase, so check which your site needs. As a single phase 230V unit the current is higher, about 65 amps. Always size against your real load and starting currents.
How much fuel does a 15 kVA generator use per hour?
Roughly 2 to 3 litres an hour depending on load, and less at part load. Sizing to your true demand keeps fuel down.