Dirty Diesel Generators Cleaner by YorPower – Emissions Compliant Generators Tier 4

Increasing emphasis is being placed not just on efficiency and fuel consumption but now also on emissions.

The European Union has established categories of allowable emissions in non-road diesel engines called Stages I, II, III(A), III(B) and IV. Each increasing stage specifies lesser amounts of four specific pollutants that are permitted, based on the number of grams per kilowatt-hour of the compounds present in diesel exhaust.

These regulations primarily affect portable diesel generator sets (18 kWm to 560 kWm) and other non-road and industrial engines. At the present time, the EU does not regulate emissions from stationary diesel generator sets such as those used for prime, peak shaving, load shedding or emergency standby power. All non-road equipment, such as rental generator sets, were required to meet Stage II requirements effective 1 January 2007 and Stage III(A) by the end of 2015.

In the EU, four main constituents in diesel exhaust are controlled:
• Nitrogen oxides (NOX)
• Hydrocarbons (HC)
• Carbon monoxide (CO)
• Particulate matter (PM)

For Stage IV and beyond, some non-road diesel engines will require selective catalytic reduction (SCR) after-treatment systems to reduce NOX, HC and CO to regulated levels. Stage IV PM reduction will require regenerative filters on the exhaust to trap and eventually oxidize the soot particles.

The YorPower range of Stage III(A) Emissions Compliant generators includes units powered by both Perkins and Cummins engines but other options are becoming available using engines from different manufacturers.

YorPower Emissions Compliant Generators
Stage III(A) Compliant


10 11 Perkins 403D-15G
13 14 Perkins 403D-15G
20 22 Perkins 404D-22G
27 30 Perkins 404D-22TG
30 33 Perkins 1103D-33G3
36 40 Perkins 404D-22G (1800rpm)
40 44 Perkins 404D-22TAG (1800rpm)
50 55 Perkins 1104D-44TG3
60 66 Perkins 1104D-44TG3
70 77 Perkins 1104D-44TAG1
80 88 Perkins 1104D-E44TAG1
90 100 Perkins 1104D-E44TAG2
100 110 Perkins 1104D-E44TAG2
137 150 Perkins 1106D-E70TAG2
150 170 Perkins 1106D-E70TAG3
180 200 Perkins 1106D-E70TAG4
200 220 Perkins 1106D-E70TAG (1800rpm)
225 250 Perkins 1106D-E70TAG (1800rpm)
400 450 Perkins 2206D-E13TAG3
450 500 Perkins 2506D-E13TAG (1800rpm)
500 550 Perkins 2506D-E15TAG2

158 175 Cummins QSB7-G5
182 200 Cummins QSB7-G5
200 220 Cummins QSB7-G5
225 250 Cummins QSL9-G7
250 275 Cummins QSL9-G7
275 300 Cummins QSL9-G7
300 330 Cummins QSL9-G7
409 450 Cummins QSZ13-G7
November 2015

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Standby Diesel Generators

YorPower Generator

YorPower Generator

Standby diesel generators are used by businesses and remote domestic dwellings in the UK and, where backup power is needed, all over the world. The ever increasing demand on mains power networks coupled with the reducing number of power stations means an alternative supply is essential for businesses to function without interruption.

In developing countries, where networks are not capable of delivering increased demand, standby generators are typically used as the primary source of power for homes as well as for commercial use. Diesel and petrol/gasoline is cheap in many of these countries so running a generator is an economical way to provide power.

Why buy generators and not something more efficient or less damaging to the environment? The answer is wholly financial; a standby generator is the cheapest capital purchase by some distance and will provide quick, available power where and when needed. It is simple maths. Compared to solar or other non-fossil fuel alternatives, generator power, using diesel is by far and away the most cost effective. Diesel generator efficiency.

Budgeting for, and investing capital in, standby power for disaster recovery (link to blog disaster recovery) in developed countries makes good sense. However, when using generators as the sole or primary source of power in the developed world as an alternative to mains electricity, the costs are high. For example, in the UK if your electricity bill over 10 years was, say, £10,000 the cost of buying and running a generator over the same period would probably be more like £50,000! Combined Heat and Power (CHP) systems can be an effective way of maximising the total energy produced, but still fall some way short. Environmentally, generators are a long way short of ticking the ‘green box’ but until grid supplies worldwide are beefed up and can cope with current and future power demand or a genuinely viable green alternative presents itself, a standby diesel generator will remain the first choice for backup power.

Like it or not, environmentalists can do very little about the predicted spiralling increase in the number of generators predicted over the next three years, even in the developed world. To underline this point, last year Hurricane Sandy devastated New York City and other parts of the State. The storm occurred on October 25th 2012; domestic generator demand was so great immediately following the event that people had to wait until April 2013 before they could get their emergency cover in place. In the US, regulations governing C02 emissions is as high as anywhere in the world, ironic considering the average US citizen consumes 6 times more power than its nearest rival. On the flip side, Americans typically install gas generators as the preferred choice for their domestic standby power, which, whilst significantly more expensive in terms of capital outlay than diesel, are far cleaner and produce much lower emissions.

In summary, the lack of alternatives to standby diesel generators for backup and emergency power means generators will be around for some time to come.

For more information on standby diesel generators, gas powered generators or CHP gensets please email YorPower (sales@yorpower.com) or call us on +44 (0)1977 688 155. Website

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Backup Generators and Disaster Recovery Planning For Your Business

Untitled Document

Power Cut

In the majority of developed economies the likelihood of a major event causing your business to cease functioning is low.  For example, backup generators in the UK are rarely called into action because the power supply, provided by the National Grid and supported by utility companies, is reasonably reliable.  However, you might be surprised by the actual number and frequency of power outages that occur, particularly in town centres, even in the UK and USA.  One major city centre close to YorPower’s headquarters has suffered more than four major power black-outs every year for several years and OFGEM warns that the situation is likely to get worse.

The situation in many developing economies is even more extreme and infrastructure fragility means that even where a supply network exists it is likely to be very unreliable with frequent and long lasting periods of no supply.  In many countries in Central America and Africa in particular the infrastructure is so unreliable that any business must be prepared to supply its own inputs.

The purpose of a Business Disaster Recovery Plan (or Continuity Plan) is to make sure your business is ready in the event of the unavailability of main services (for example: electricity supply) and to restore services to the widest extent possible in a minimum timeframe.

Once your Plan has been finalised it is essential that preventative measures are implemented to minimise operational disruptions and to recover as quickly as possible when an incident occurs.

This process is challenging enough for a large business but can be even more difficult for smaller organisations with fewer staff and resources but, as ever, proper planning can mean the difference between the survival or demise of your business.

The scope of your Plan will depend to a large extent on your business processes.  The simpler the business, the simpler the Recovery Plan. So your first step should be to list your business processes.  Then, next to each process, list all the systems that each process depends on.  For example, if you manufacture an item using a machine you may depend on electricity to power the machine, a computer to control it, a delivery system to provide raw materials and a packaging system to prepare the finished item for despatch and, of course, the operators you depend on.  You will notice that, even in this simple system two other systems are mentioned – each will have its own dependencies.

When you have your list of systems and the inputs they depend on you can decide how important each process is to your business.  You should consider what effect the stopping of each process would have on your business.  If it is critical then your plan needs to include the actions you will take to replace the input in the event of the failure of your current supply.

For example, if one or more of your critical business processes depends on the constant supply of electricity then you need a plan to provide that electricity when the main supply is cut off.  One overriding critical process for most businesses these days is the business server and associated computers.  We all know the frustration of a computer crash causing loss of unsaved work.  Imagine the damage caused when your whole computer system shuts down – not just loss of data but also loss of control systems, loss of communications and staff unable to do any work.  In such circumstances your Recovery Plan could well include an Uninterruptable Power Supply (UPS) to provide instant power for the few minutes it will take for a backup generator to come up to power.

Your Plan should also consider the length of time it could take to implement replacement and whether the input is so critical that you would not be able to wait for replacement.  Remember, some of the conditions that could lead to the loss of a critical input could easily affect other businesses too.  In that case there could be a lot of competition for replacements.  For example, if a water failure caused by a pipeline defect effects your whole area then all your neighbours will be trying to obtain water via tankers at the same time.

You should consider either setting up a contract for the priority supply of an alternative input or have that input in place and on permanent standby.

For example – if your business would come to a halt without electrical power (and remember that means servers, computers, lights and heating systems – not just machinery and equipment) then you could be well advised to add a backup generator to your asset list as soon as possible.  The capital cost is unlikely to be anything like the cost of losing even half a day’s business.

However, it must be remembered when specifying a diesel generator that many electrical devices, including most machines, require more power to start than they do while running.  Any backup generator must be capable of handling the start-up load, not just the normal running load, of all your devices – assuming you will start them all at the same time.  A phased start will mitigate this need but will have to be carefully planned to avoid overload.  For free advice on the size of generator your business needs contact YorPower on +44 (0)1977 688 155 or email sales@yorpower.com.

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Perkins Filters, Fleetguard Filters, Lister Filters, Cummins Filters, FG Wilson Filters


Counterfeit products and non-branded filters are commonly used in some markets, sometimes knowingly, sometimes not, especially in parts of Africa.

YorPower Spares and Filters

There are some pretty convincing imitations from the Far East but using them puts your own or your client’s equipment in jeopardy. It is easy to overlook the importance of correct filtering of air, fuel and lubricating oil and buying cheap filters can lead to costly breakdowns and can even cause engines to seize up completely.

Branded, OEM, filters designed specifically for particular products are essential. The Warranties provided by generator manufacturers including FG Wilson, Perkins, Fleetguard and Lister will be invalidated unless OEM guidelines are followed.  The scheduled replacement of oil and air filters is not only sensible but can also save you thousands of pounds over the life of a generator.

Fuel is frequently contaminated in places like Nigeria and any shortcuts in fuel filtering will prove massively costly if the engine malfunctions as a result.

Oils have to be kept clean and free from particles to prevent wear and tear and to return harmful particulates to the sump so preventing them from damaging the engine. Regular replacement of oil filters ensures continuous purification of your oil as well as removing the trapped particles from the system completely (upon removal of a clogged filter element).

Clean oil protects your generator engine from wear and subsequent breakdowns and your oil is only maintained by proper servicing and monitoring of your filtration systems.

YorPower hold stocks of all popular engine filters including Perkins, FG Wilson, Volvo, Fleetguard and John Deere and a huge range of other Original Spare Parts


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Used Generators – Things To Check Before You Buy

Used Generator

YorPower apply the same high standards of engineering, workmanship and service to their used generators that they do to the ones they build

When buying a used generator, just like buying a used car, you need to be confident that you’re not going to finish up with an expensive problem.

You should see evidence of the number of hours it has run and ideally that the generator has been serviced according to the manufacturer’s recommendations. But, just like a used car, can you be sure that the running hours stated on the control panel are genuine, that the service records are accurate and that the important filters and lubricants are correct? Not always! Sometimes it is just not possible to obtain the right information and that is why the buyer should be mindful of who the seller is.

Once you are confident that you can trust the information, buying a used generator can be a very efficient way of reducing capital outlay if your application is for standby power.
Every Used generator set should be tested and follow a staged process prior to sale:

The first step in ensuring reconditioned generators will meet expectation is to select good quality equipment. That will mean shopping around and doing your research. It is prudent to review an engine’s history and maintenance regime before purchase or acceptance in whole or in part exchange. Used generators that are nicely painted, have a new control panel fitted or look newer than the hours recorded (or stated by the seller) should ring alarm bells – be careful, they might have been used and abused.

Initial Load Test
Using a calibrated load bank to test the capability of the engine and complete unit under duress is a very good way of uncovering any failings. A load test is not unlike taking a used car and driving it hard on a motorway for an hour. A full load test up to 100% of capacity is recommended. It will help diagnose any potential shortfalls and should help you make an informed choice.

Repairs & Upgrade
You should always request a new control panel as part of the purchase deal as analogue units are not compatible with many modern telecommunication devices that could be fitted and be useful at a later date. The control and alarm system may include an auto start with automatic mains failure capability, remote start, modems, GSM’s and acoustic enclosures could be upgraded or retro-fitted. Consumables such as filters, belts and hoses should be checked for ware and be replaced if appropriate.

Final Load Test
If a used generator has failed the initial load test it may require another if the faults uncovered were considered to be minor and the purchase still worth pursuing. The unit should be tested again on load for a minimum of one hour and with staged loads up to 100%. During test both the engine and alternator should be monitored for speed and voltage characteristics to ensure the pre-requisite demands are met. A test certificate should be produced.

A good source for used generators, particularly large generators, would be hospitals, universities, telecommunication centres, banks and data centres. More often than not large generators installed for backup power in the UK are rarely, if ever, called into action and so typically have very low hours and are in good condition.

YorPower apply the same high standards of engineering, workmanship and service to their used generators that they do to the ones they build and manufacture as new; all carry a full Load Test Certificate.

See Used Generators from YorPower http://www.yorpower.com/m-used-generators-.htm

Available Used generator stock

For more information about used diesel generators for sale, http://www.yorpower.com/p-generators-used-generators-.htm

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Diesel Generators – The Importance of Maintenance

The Importance of Maintenance

YorPower Generator Servicing

You need your generator to be reliable. Whether it’s to be your main source of power (on a construction site, for example) or simply for backup you need to make sure you’ve got the right one for the job but getting it set up is just the beginning. You need to be confident you’ve got a generator that can live up to the demands of the role to provide an efficient, reliable source of power for the long-term so you need to put an effective maintenance regime in place and the importance of it can never be underestimated.

Be prepared

It’s all about being proactive and implementing a routine to make sure you’re not left with a generator that doesn’t provide the power you need. It could easily start to develop faults if it doesn’t undergo regular maintenance so you need to make sure you know the type of issues you could face and get a schedule arranged accordingly.

Stick to the schedule

How frequently your generator will require maintenance will depend on a whole range of factors from the engine you’ve got to the amount you use it but periodic checks can go a long way to improving its service life. You’ll want to set up a schedule of things that will need to be checked monthly, quarterly and yearly and don’t think you can avoid it if the generator is only there for backup either. Yes, it could be purely used as a standby but what would happen if you had an emergency only to find the generator didn’t work? If it’s out of action for some time it could well have developed issues so giving it a regular once-over will ensure it’s ready when you need it.

Won’t it cost more?

Not necessarily. It will cost money to have your generator maintained but the cost will be nothing compared to having it repaired or even replaced should it start to deteriorate or if it fails when you need it most!

Have a generator that performs

Failing to keep up with servicing in an attempt to save some cash will only ever be a false economy. You need your generator to provide power and without proper maintenance it could let you down so never underestimate the importance of proper maintenance and you’ll have a usable, efficient and fully-functioning generator that will deliver the performance you need when you need it.

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Generators for Farmers, Agriculture and Occasional Users

Diesel generators are an essential purchase for a whole range of applications but that doesn’t mean you want to spend a fortune. Choosing used versions will often be far more cost-effective than going for brand new ones but because you’re not getting a generator straight from the manufacturer you need to be even more careful in your choice, as choosing poorly could easily leave you out of pocket. That’s why we’ve put together a quick guide on how to choose used generators, helping ensure you make the right decision for a generator that can fulfil your requirements without breaking the bank:

Know what you need it for. This is your first and most important consideration of all – do you need a generator for long-term use or do you need a standby generator for emergency situations? What do you need power for and how much power do they require to start up and to run? These questions and many more besides will determine the generator that’s right for you and you’ll want to do your research so you can see which one would be most suited to your individual requirements.

Know the number of hours the generator has run, its maintenance history and schedule. It’s important to understand the maintenance schedule of any generator you’re thinking of buying, with a proper schedule extending the life and ensuring costs can be kept in check. You’ll want to look into its repair history to make sure it’s in proper working order too, but a reputable dealer should have refurbished it to ensure it’s got a decent service life ahead.

Know the cost of spare parts. The cost of repairs can seriously eat into your budget so you need to know what the costs could be should any parts need replacing. Every generator is different with different parts accordingly, and of course, that means the price will differ too -knowing the cost of any replacements can ensure you make an informed decision so you don’t get any surprises later down the line. YorPower has a huge parts and consumables division backed by the expertise to supply the parts you need as quickly as possible.

Know the running costs. As well as maintenance schedules and repairs you need to make sure you know what the general running costs will be so you can budget accordingly. Costs will vary according to the model you choose and the amount it’s going to be used so always factor this in and do your research accordingly.

It’s all about knowing the facts so you can effectively determine the price, condition and any future running costs so you know what you’re getting for your money. Budgets are becoming increasingly tight and you don’t want to be left with a generator that will add to your overheads with costly repairs, replacements and maintenance issues but if you ask the right questions and do your research you’ll be able to get a great deal for a generator that can meet your every requirement.

Want to find generators for sale that can meet your expectations and deliver the performance, service life and price you’re after? Then you’ve come to the right place. YorPower carefully source diesel generators with low hours and full maintenance histories before refurbishing them to meet your high standards, so get in touch and you’ll find choosing a used generator can be quick, simple and hassle-free.
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International Standards Organisation (ISO) Generator Power Definitions

Consultants, generator users (and some resellers) are occasionally confused by the different terms used when defining a generator’s power.  Such confusion can lead to expensive mistakes when buying or hiring a generator so YorPower have listed the full definitions below.

The International Standards Organization (ISO) defines four types of duty in ISO 8528-1 (2005)

Continuous Operating Power (COP)

Prime Running Power (PRP)

Limited-Time running Power (LTP)

Emergency Standby Power (ESP)

To help in understanding the differences when specifying or preparing tenders these are the official definitions:

Continuous Power

Unlimited hours of use.

Non varying load factor is 70% to 100% of the published Continuous Power.

Typical peak demand is 100% of continuous rating for 100% of operating hours.

Note: Operating at load factors above these rating definitions will result in shorter oil change intervals and reduced hours to engine overhauls, resulting in higher generator and engine costs per year.

Refer to the Owner and Operating manuals for package specific service intervals and the impact of operating at higher load levels. Some ratings definitions are not available for all models.

Prime Power

Unlimited hours of use.

Average variable load factor is 70% of the Prime Power rating. 10% overload limited to 1 in 12 hours and/or not to exceed 500 hours per year. The 10% overload is available in accordance with ISO 3046-1 (2002). Life to overhaul of the engine is dependent on operation as outlined in ISO8528 (2005) and time spent operating above the rating guidelines will reduce the hours to engine overhaul.

Standby Power

Typical usage of 200 hours per year with a maximum of 500 hours per year with varying loads. Average variable load factor is 70% of Standby rating. No overload is available. Not for maintained utility paralleling applications.

Emergency Standby Power

Typical usage of 50 hours per year with a maximum of 200 hours per year with varying loads. Average variable load factor is 70% of Emergency Standby Power rating. No overload is available. Not for maintained utility paralleling applications.

With these definitions in mind a generator described as producing “200kVA Prime Running Power (PRP)” could usually be expected to provide an additional 10% of its PPR i.e. “220kVA on Standby Power Basis” and typically for 1 hour in every 12 up to a maximum of 500 hours per year .  It is vital when considering the purchase of a new generator that users compare generators using the same power ratings output.

YorPower publishes documents to assist generator users and specifiers – please click below to see other useful information



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YorPower Generators

When you’re on the lookout for a new or used generator you want to be sure that you’re getting the best possible unit within your budget.

Come to us

The good news is that as long as you know where to look you can benefit from excellent quality products without breaking the bank. At YorPower we go out of our way to offer a broad selection of top-notch generators for sale.

Indeed, we’re the UK’s leading independent manufacturer of diesel generators and have more than a quarter of a century’s experience in the field so you can rely on our expertise.

Whatever your needs

Because of our size and the strong supply partnerships we have forged over the years we can offer diesel generators to suit most power applications. Whether you need the items for industrial or manufacturing processes, to help with mining or agriculture or for data center and telecoms bases YorPower have the products and the skills to provide the best solution for your needs. Also, our generators can be ideal for private and domestic use and in hospitals, police offices and universities. We really are a one-stop-shop for these products.

More details

It’s worth noting that our diesel generators range from 3.5kVA to 3,375kVA at both 50 and 60 htz. Also, they come with proven, high-quality engine and alternator combinations. Most comprise a Perkins engine with a Leroy Somer alternator. However, we do manufacture gensets using a Cummins/Newage Stamford combination and MTU/Newage if this is preferred.

Peace of mind

It’s important that you have confidence in the generators you buy. We provide a two-year warranty as standard on all standby generators. We also have a help desk for additional customer support.

In addition our sister company, Power Plant Services, provides full UK coverage for large and small generators, UPS support, hire and maintenance. This includes a 24-7 emergency callout service and next day delivery of parts.

The full low down

Take a few minutes to look around our website. For more information you can also get in touch with our friendly, professional team by phone on +44 1977 688 155 or by email on sales@yorpower.com

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Finding the Right one from a Host of Diesel Generators for Sale

Here at YorPower we have a massive range of diesel generators that allow us to supply the exact unit you need to meet your requirements. One such requirement is providing small generators to power residential houses. Deciding on what type of generator and which will be the most economical, environmentally friendly and easy to run are the primary factors. Those that consider acquiring a generator as a prime or backup power source in the home do so for a variety of reasons, yet deciding on which unit to buy can seem like a step into the unknown.

We understand that you might not be prepared to make those decisions without a little advice from those who understand the industry best, which is why we offer a complimentary consultation so that whatever option you ultimately decide to explore, your choice is informed.

If you’ve been browsing the generators for sale on our website, but can’t work out what might be best for you, you should first ask and get the answers to a couple of important questions that will help you feel a little more comfortable and an understanding for what it is you need to do the job.

Diesel generators – Replacing Grid mains supply or Backup?

This is a major consideration, as the application determines how long you will be running your generator for under normal circumstances.

If the generator is to be the principal source of power for your property, then it will run most of the time, if not, all of the time. These applications are sometimes referred to as Base Load or Continuous Operating Power (COP). If the generator is running for long periods you will need to have the capacity to power all of the appliances that you are likely to use and enough fuel or batteries to assist!

Standby generators or backup generators on the other hand, will be in use for shorter periods of time – normally when there is a power cut. These occasions tend not to be too long, though clearly you still want to be sure that you have the capacity to cover any lengthy power outages. Likewise, the usage for that period of time might be less, given that at times such you might be looking at being economical in your consumption.

What’s My Wattage?

It’s important to consider the amount of energy you consume on a day-to-day basis and/or that you calculate what you will need at any given time. There are many variables, but it is possible to work out a fairly accurate idea by thinking about the appliances that you have in your home and recording their kW rating.

Modern plasma screen televisions also use up to five times as much energy as older models, so this should be another area to seriously consider. Electrically powered ovens are power hungry as are kettles!

Elsewhere, you should give thought to how energy-efficient and how big appliances like your fridge and freezer are. They cannot be switched off, given that they are effectively constantly in use. When power demand is low, typically at night it is possible to link your generator to an inverter to power batteries. The generator would only fire into action when the batteries had been depleted. Something else you can ask us about…..

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