New Diesel Generators For Sale.

What’s the difference between kVA and kW when buying a new diesel generator?

kVA (kilovolt-amperes) measures the total power output, while kW (kilowatts) measures the actual usable power. Most new diesel generators have a power factor of 0.8, meaning a 100kVA generator delivers around 80kW of usable power. When comparing new generators for sale, always check whether the rating is in kVA or kW. If your equipment needs 80kW, you’ll need at least a 100kVA new industrial generator to run it properly.

What does “prime rated” vs “standby rated” mean on new diesel generators for sale?

A standby-rated new diesel generator is designed for backup use only, typically under 500 hours per year during power cuts. A prime-rated generator can run continuously as your main power source. The same generator often has two ratings: for example, 100kVA prime and 110kVA standby. If you’re using your new industrial generator as your primary power source (construction sites, remote locations), you need the prime rating. Using a standby-rated generator as a prime source will void your warranty and shorten its life.

How do I calculate what size new generator I actually need?

Add up the wattage of everything you need to power, but here’s what most people miss: electric motors draw 3-7 times more power when starting than when running. A 10HP motor uses about 13 amps running but can spike to 117 amps on startup. So your new diesel generator needs enough capacity to handle those starting surges, not just the running load. Also, never run a generator at more than 70-80% of its rated capacity for extended periods. If your total running load is 80kW, look at new generators for sale rated at least 100-110kVA.

How much diesel will a new industrial generator use per hour?

Fuel consumption depends on load, not just generator size. As a rough guide: a 20kVA new diesel generator uses about 2-4 litres per hour, a 100kVA uses 10-20 litres, and a 500kVA uses 50-100 litres, all at full load. Running at 50% load cuts fuel use significantly. New diesel generators typically consume around 0.25-0.3 litres per kWh produced. We can provide specific consumption figures for any new generators for sale in our range to help you budget running costs.

What happens if I run a new diesel generator below 30% load?

Running any new industrial generator consistently below 30% load causes “wet stacking”, unburned fuel builds up in the exhaust system, creating carbon deposits, reducing efficiency, and potentially damaging the engine. This is one reason why correct sizing matters when looking at new diesel generators for sale. If your loads vary significantly, consider two smaller new generators that can run in parallel rather than one oversized unit. If you already have this problem, load bank testing can clear the buildup.

What’s included when I buy from your new generator sales?

All our new diesel generators for sale come complete with: the generator and engine assembly, control panel, base frame fuel tank (typically 6-10 hours capacity), circuit breakers, battery and battery charger, operation manuals, and full manufacturer warranty. Acoustic enclosures (canopies) for noise reduction, extended fuel tanks, automatic transfer switches (ATS), and bespoke control systems are available as options. We’ll specify exactly what’s included before you commit.

Why choose Perkins or JCB engines in your new diesel generators?

Both are proven performers with different strengths. Perkins engines (fitted in our Powertech generators) are known for fuel efficiency and are widely serviced across the UK, you won’t struggle to find parts or engineers. JCB engines are built for harsh conditions and heavy-duty use, making them popular for construction and industrial sites. Both meet current emissions standards. The right choice depends on your application; we can discuss which new industrial generators suit your specific needs.

Do I need an automatic transfer switch (ATS) with my new generator?

If you’re using a new diesel generator as standby backup to mains power, an ATS is essential for most applications. It automatically detects power failure, starts the generator within seconds, and switches your supply over, then reverses the process when mains returns. Without an ATS, someone must manually switch power sources. For data centres, hospitals, and any site where power gaps cause problems, an ATS isn’t optional. We can supply and install ATS panels matched to any of our new generators for sale.

How often do new industrial generators need servicing?

For new diesel generators, the first service is typically at 50-100 hours (an initial “bedding in” service), then every 250-500 hours depending on the engine. Standby generators that don’t run much still need annual servicing, including running under load to prevent wet stacking. Service intervals include oil and filter changes, coolant checks, fuel system inspection, battery testing, and control panel diagnostics. Our maintenance contracts for new generator sales cover routine servicing and 24/7 emergency callout.

What warranty do your new diesel generators for sale include?

Warranty terms depend on how you use the generator. For standby applications (backup power only), most new diesel generators come with 2-year warranties or up to 500-1000 hours of operation. For prime power use (main power source), warranties typically cover 1 year with unlimited hours. Using a standby-rated new industrial generator for prime applications will void the warranty. Extended warranty packages are available. We’ll confirm exact warranty terms with your quote.

Can you configure a new generator to specific requirements?

Yes. While we stock standard new diesel generators for quick delivery, we also configure units to exact specifications. Common customisations include: specific voltage outputs (single or three-phase), acoustic enclosures rated to particular dB levels, extended fuel tanks for longer run times without refuelling, bespoke control panels with remote monitoring, and trailer mounting for mobile applications. Tell us your requirements and we’ll specify a new industrial generator to match.

How loud are new diesel generators, and are there noise restrictions I need to know about?

Noise levels for new diesel generators range from 75-85 dB(A) at 1 metre for canopied “silent” models, to 100+ dB(A) for open-frame units. For context, 85 dB(A) is about as loud as heavy traffic. UK regulations limit noise to 10 dB(A) above background levels during the day, and just 34 dB(A) after 11pm in residential areas. Workplace rules require hearing protection above 85 dB(A). If you’re installing near neighbours or in noise-sensitive locations, you’ll likely need a canopied new industrial generator. We specify dB(A) ratings on all our new generators for sale so you can check compliance before buying.

What site preparation is needed before installing a new industrial generator?

Most new diesel generators need a solid, level concrete base, typically 1.5 times the length and width of the generator itself. The base must support the weight (a 100kVA generator weighs around 1,500-2,000kg) and handle vibration during operation. You’ll also need: adequate ventilation or clearance for airflow, fuel supply arrangements (base tank or external bunded tank), exhaust routing that vents safely away from buildings and people, electrical cabling sized for the generator’s output, and weatherproofing if it’s an open-frame unit. 

How quickly can you deliver a new diesel generator if I need one urgently?

We hold stock of popular new diesel generators for sale, so standard units can often be dispatched within days. For urgent requirements, we offer expedited delivery across the UK. Custom-configured new industrial generators, those with specific voltage outputs, extended fuel tanks, or bespoke enclosures, typically take 2-4 weeks depending on specifications. If you have an emergency and can’t wait, we may be able to supply a temporary hire unit while your new generator is prepared. Call us to discuss your timeline, we’ll find the fastest solution from our new generators for sale.