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When you buy a diesel generator, you are often buying a piece of machinery that will stand the test of time and provide you with back up power when ever you need it. However, to keep your generator running at its best and to avoid frequent generator repairs, you may need to do a little maintenance work to keep the generator running at its best for as long as possible.

Low Sulphur Diesel

There is research to support that low sulphur diesel can help prevent microbes growing within the diesel engine that can over time affect the performance of the generator. Using low sulphur fuel can help prevent this, as can testing the fuel every 6 months or each time you add new fuel. You can treat the fuel with biocides each time new fuel is added. If you test your generator and find that there are microbes in there, you can get it treated and remove them. It I best to test for them regularly to stop them reaching the inside of the engine.

Replacement Parts

We recommend looking at replacement parts if you have issues with your diesel generator. We offer generator repair services and recommend replacing parts on the generator before purchasing a new generator. This way you save money and still have a long lasting diesel generator.

Wet Stacking

The buildup of fuel vapours and soot in the exhaust system (known as wet stacking), is another problem that is easy to prevent but requires maintenance.

Wet stacking is when a diesel generator is ran at significantly reduced loads, meaning the exhaust doesn’t reach a high enough temperature to burn off the fuel vapours.

To prevent this, you can load bank test the generator once a year and also run your own tests of powering up the generator to 30% of power for half an hour and see if the vapours are burned off. If they do not, we recommend contacting our qualified generator engineers who will be able to run the same test at 75% of the power to force the exhaust to burn everything off. However the risk with this is down to a potential buildup within the exhaust, this could ignite and be a major fire risk if carried out by an unqualified engineer.

Trustworthy Fuel Supplier

This may not be a direct impact on the running of your diesel generator but having a reliable source of quality diesel fuel isa must for any owner of diesel generators. Having someone to fill the tank regularly, deliver the fuel, contingency plans for in the event that roads are blocked so fuel cant be delivered etc. and much more. Having a trustworthy supplier will mean that no matter when you power up your diesel generator, you can rely on it to work properly and not run into any issues, giving you the backup power you need to continue your day to day business.

If you are based in a location that has frequent low temperatures, then you should also have someone on hand to be able to prevent the diesel from gelling and clogging the engine.

Running You Diesel Generator

Running your diesel generator is a straight forward process if you look after your generator well. Doing this will mean you have a diesel generator that is reliable and long lasting, giving you extended back up power for years to come.

If you have any questions about your diesel generator or would like to speak to one of our team about scheduling in a generator service or repair, then give us a call today on; 01429 264 097

With Winter in full swing, storms hitting the UK and cold spells across the country, many areas are facing power cuts and power issues.

Businesses are particularly being hit with power shortages from restaurants losing food produce, to offices not being able to use their IT equipment. The effects are causing many businesses to lose money and productivity.

With the storms, flooding and high winds set to continue for the next few months, businesses are turning to generators and back up power supplies to save them from losing out. With onsite generators being installed across the UK, many businesses are seeing their power being immediately restored as the main power connection fails, thanks to the backup generators.

Common Problems Caused by a Power Outage

There are a few common problems that you could face with a power outage, that a generator will help you to prevent from happening;

Communications interrupted


Communications often rely on landlines and emails within many businesses in the UK. Any sort of power outage could mean a loss of emails, incoming and outgoing. It could also mean your employees not being able to communicate internally with each other to keep projects on the go. External communications with current customers, potential new customers and stakeholders could also be interrupted, resulting in customers not making enquiries or sales, stakeholders not getting updates and more.

Internal systems halted


Internal systems could be brought to a halt. If your employees can’t turn on their computers, access the databases or manage stock levels, your business will not function as it should.

This could result in your business being forced to close whilst the power is out. Facing this kind of issue thank to a power outage, will also cause a backlog when the systems are back up and running. This could mean an even greater loss of productivity as your employees take time out to work through the backlog before getting back to their regular working day.

Whilst systems are down, you may face a loss of data too. Depending on your business will depend on the type of data you lose such as sales data, or stock data.

Productivity and motivation take a turn for the worst


Leading on from points already mentioned, the lack of productivity is potentially the biggest problem to deal with. Employees will not be able to carry out their jobs. Whilst many business owners will often say ‘there is always something to do’, their abilities to carry out offline tasks will only be short-lived for those businesses before they need to access emails, phone lines, sales/ops/admin softwares and databases. Paying staff that are not able to be productive and generate income will ultimately affect your overall profits and revenue. Facing multiple power cuts will ultimately affect your annual profits and incomes.

Manufacturing will cease


It comes as no surprise that without power, machinery cannot operate. If you’re a manufacturing business, you will most likely have daily, weekly and monthly manufacturing targets to hit for your clients. Facing a power outage here could not only result in a lack of product being made but also customer relationships and maybe even a loss of customers.

A haunt in manufacturing could mean you having to turn down orders, and a huge backlog when the power comes back on. Further affecting productivity and revenues.

Back-up generators and power systems to avoid losing money

All of the reasons listed above are enough to prove that every business in the UK will see the benefits from investing in a back-up generator for their business.

There are a number of steps you could take to prevent your business from facing issues such as these during your next local power cut. The main and most beneficial measure is to install a back-up generator that is powerful enough to power your business. Depending on the industry you operate in and the size of your business, you will require a particular strength when it comes to another power source.

A back-up generator such as a diesel generator, will immediately kick into power when you face a power outage, meaning you will not face that dreaded down time and loss of money and productivity.

Generators will also come in handy for those times that your local electricity networks have planned maintenance. You are able to get alerts on when these are scheduled, meaning your will be able to schedule the switch to your generator, again avoiding the business coming to a halt.

Generator Maintenance.

Installing a generator on a permanent basis at your company base, is a very practical and beneficial action to take to keep your business up and running. However it is important to maintain any generator you have on a long term basis. Hiring a professional engineer to service your generator on a regular basis is a must. You may be able to agree a servicing agreement with the provider of your generator.

Although this may seem like an unnecessary cost to your business, the long term benefits far outweigh the short term costs.

For those businesses that require the more powerful of generators available, we highly recommend diesel as your choice of generator. There are 4 types of generator available, but diesel is the most beneficial thanks to being more fuel efficient and practical in terms of mechanics and the power generated.

Our range of generators is vast and includes both new and used generators. Both of which are reliable and high performing thanks to our own generator servicing and repairs. Our experts take pride in their work and carry out every service or repair to the highest level. We work with many businesses across the UK to ensure they have a back up source of power on their premises.

Are you prepared for a power outage?

If you would like to discuss the options we have available, or have any questions about our generators for sale, simply give our team a call. For those who aren’t sure where to start, we can still help! All we need to know is a few details about the space you are wanting to power and the amount of power you will require, which we can help you determine with a few questions.

Call us on; 01429 264097 today.

With years of experience in providing generators, we often get asked a number of questions and queries. So we’ve put together the most frequently asked questions, to help and assist with any answers you may require.

There are many different types of generators to choose from, how do I decide which product to choose?

In this day and age, there’s many different types of generators out on the market, with Bellwood Rewinds you can buy in confidence as our products are of only the best quality.

What size generator do I require?

All electrical products have data plates which include information about their power usage. Electrical items have their wattage listed and include all the power required to run them. So if you check the amount of wattage you’re going to be powering, you can choose a motor which meets this.

If you’re unsure as to the power usage a product has, it’s a good idea to contact the relevant manufacturers sales or technical department, you can quote the model number and request the start up wattage and running wattage of the item. Once you have received this information you’ll be able to determine the accurate size of the generator you require.

Do I need a generator that has a long run fuel tank?

Generators are available in either standard or long run versions, standard tanks last for 2-4 hours and most long run generators can run through the night, should you be looking to purchase a generator for back up (power cuts) then we recommend a long run tank machine.

Do I need to run a computer off my generator?

Running home computers from standard generators is not advisable, you’ll need a generator that utilises AVR (Automatic Voltage Regulation). These type of generators will provide a more stable electricity than the mains, if the generators run out of fuel, the engine is likely to surge. Avoid this affecting electronic equipment by using a Uninterruptible Power Supply, these are typically sold for use with computers so that data is not lost in the event of a power cut.

I’ve bought a generator, can I use a personal power breaker?

Generators are configured differently to mains supplies, it’s recommended to use a personal power breaker from the mains for the majority of cases. It’s not necessary to use one with a generator. Personal power breakers are designed to operate from the mains. If one is to be used with a generator, then it’s necessary to modify the generator so that it is configured in the same way as the mains. This is a simple change for a qualified electrician and involves adding a link wire.

What is the difference between kw and kva?

There are 3 types of electrics…

Real power is measured in Watts (W) and is power drawn by a resistive load, for example a heater element in a kettle and a power factor of 1.

Reactive power is measured in Volt Amperes reactive (var’s), this power is drawn by a reactive load (a load with a winding around a core) an electro-magnet has a power factor of 0.

Apparent power is measured in Volt Amperes and has a combination of resistive elements. The combination for the elements means that both real power and reactive power are drawn together.

The proportion of real power to reactive power is defined as the power factor. The vast majority of single-phase loads have power factors approaching 1, therefore a single-phase generator power ratings are taken at power factor =1, and in Watts or kilo Watts. Three phase loads tend to have lower power factors approaching 0.8, therefore, three phase generator power ratings are taken at power factor =0.8 and are in va or kva.

There is a relationship between real power, reactive power, apparent power and power factor.

Can I operate sensitive equipment from a generator?

The output from the generator isn’t as stable as that from the mains supply, the speed of engine driving there alternator is controlled by a simply mechanical governor, consequently the speed will drop as the load increases. The frequency of the output voltage is directly dependent on the engine speed, meaning the frequency of the output varies with load. The output voltage will vary with load and with temperature. Output voltage of most standard generators will remain within 230v +/-105 from no load up to the rated current quoted on the dataplate. This will be the guaranteed range of voltage supplied from the mains utilities.

The frequency of the output voltage will vary typically from 53hz at no load to 49hz at rated load current, whereas mains supply is unlikely to vary by more than 0.1hz. Most electronic equipment is designed to cope with these fluctuations and will run normally, it’s always recommended to ask the equipment supplier whether their equipment supplier whether their equipment is suitable to be operated from a portable generator.

As a generator rungs out of fuel the engine is likely to surge, avoid this affecting electronic equipment with an Uninterruptible Power Supply, these are typically sold for use with computers so that data is not lost in the event of power cut.

With the music festival season finally here, we’ve already seen great shows from the likes of Glastonbury and Radio 1’s Big Weekend. With huge line ups of some of the most powerful musicians in the world and crowds of over 180,000 visiting these events, it’s no wonder these events need temporary power outlets on the biggest scale.
From stages and sound systems, to food stalls and portable loos, festivals can use over 30,000 megawatts of electricity over a weekend, this is similar to the equivalent of electricity that the people of the city of Bath would use!
Despite these huge demands, in this day, organisers are becoming more determined to make the event as environmentally sustainable as possible, so tend to go for ways which promote their event in a way which improves green credentials.


When it comes to most major music festivals, they produce a lot of rubbish, so organisers have taken an active stance on reducing waste material by installing recycling binds around the festival sites, this ensures that around 50% of the two thousand tonnes of waste produced is recycled.

Electric vehicles

Since the 2000s, mud-phobic celebs and VIPs have been known for opting for transportation in electric golf buggies which are recharged using solar power.

Greener fuel

Festivals promote green credentials and organisers will encourage traders to take this into consideration when planning their energy sources.
Most poser used at festivals is provided by generators, with hundreds being used around the sites. Many generators are run on 100% biodiesel fuel which is powered by waste vegetable oil, a renewable substitute for regular diesel which emits 85% less CO2. Tractors may also be used to carry equipment and these will be ran on biodiesel.
When it comes to the huge power demands of festivals, in some cases, up to 250 generators are provided which can support 750 traders with power. Bio-diesel generators require more than 60,000 litres of waste vegetable oil to run a festival and will need tankers on standby to make sure a secure fuel supply.
Other initiatives include helping to reduce the number of generators used through power sharing, this is beneficial to small businesses at the festival, by splitting the costs on larger generators, it can help reduce business energy prices for food traders and stall holders who help make festivals what they are.

Why choose biodiesel generators?

There are number of advantages and benefits including…

  • Biodiesel recycles waste oil back into fuel, this eliminates the dangers of inefficient and often dangerous disposal or its re-use in the food chain.
  • The lifecycle of biodiesel emits 85% less CO2 emissions than fossil fuel.
  • Unlike alternative sources, switching to biodiesel incurs no major infrastructure changes.


Another way is festival organisers promoting traders to use solar panel kits by providing them at reduced prices and pitch fee for their stall the following year if they take part in the scheme. Not only do they reduce the amount of generators required, it’s a way of helping small businesses keep commercial energy process down during the festival and hopefully encourage them to use solar power at other events as well.

Nowadays electricity is an indispensable part of life today, it provides us with lighting, climate control, entertainment and much more. It’s hard to imagine life without electricity. When it comes to electrical power, energy is usually converted from other forms into electricity, powering the systems and devices that we often take for granted.

Converting energy from one form to another is a way to understand the difference between electric motors and generators, an electric motor will convert electricity into mechanical energy and provide a power source for machinery. When it comes to generators, they do the opposite of this and change the mechanical energy into electricity.

Even though there’s a significant difference in the functions, electric generators and electric motors are similar when it comes to their underlying mechanisms and fundamental structure, they both rely on an important law of physics, Faraday’s Law of Electromagnetic Induction.

The Relationship Between Electricity and Magnetism

It is well known that electricity and magnetism are two manifestations of a single fundamental force called electromagnetism, which is central to the universe as we know it. The electromagnetic force is said to have existed in its current form since the big bang.

Converting Energy into Electric Energy

According to Faraday’s Law of Induction, whenever there is a change in the magnetic field across a conductor, like a wire coil, electrons will move perpendicular to that magnetic field, this will generate electromotive force, which then creates a flow of electrons. This is what’s used to create electricity in a electric generator.

To produce this magnetic flux, the magnets and the conductor are moved relatively close to one another, the wires will wind up into tight coils, increasing the number of wires and resulting in electromotive forces. By continuously rotating the coil or magnet, whilst keeping the other in place, it will give a continual flux variation. The rotating component is referred to as a ‘rotor’, whilst the stationary component is called a ‘stator’.

Electric generators come under two categories, ‘dynamos’ and ‘alternators’, dynamos direct current and alternators generate alternating currents.

The dynamo was the first form of electric generators that were useful for industrial applications, electric dynamo uses rotating coils of wire and magnetic fields to convert mechanical energy into direct currents. Originally dynamos are used for electric power generation and use steam as a source to generate the required mechanical energy.

Today, electric dynamos use outside of a few low power applications, alternators are more widespread for electricity generators. These types of generators convert mechanical energy into alternative currents. A rotating magnet serves as the rotor, turning within a set of conductor coils on an iron core which becomes a stator. As magnetic fields rotate, they generate an AC voltage in the stator. The magnetic field can be created by permanent magnets or by a field coil electromagnet.

Automobile’s alternator, as well as a central power station, provides electricity to a grid and becomes an electric generator.

From electrical energy to mechanical energy

An electric motor does the opposite of an electric generator, they turn mechanical energy into electricity and an electric motor takes electricity then converts it into mechanical energy. Electric motors can be found in a diverse range of applications, from industrial manufacturing machinery to everyday appliances, the rotor will turn a shaft to create mechanical power. Stators are made from coil windings or permanent magnets with a core of thin sheets which are layered. These are known as laminations and create less energy loss than a solid core. There’s a small air gap between a rotor and a stator, which will increase the magnet current.

Electric motors can be piezoelectric, electrostatic or magnetic, the majority of modern motors use magnets and some are designed to run on DC whilst others run on AC. You’ll find electric motors of all sizes in an impressively wide range of applications. This includes anything from small motors in watches, to electric motors that power manufacturing machinery, this technology is robust yet elegant and central to our modern life.

How this made significant changes

As mentioned, although electric motors and generators perform opposite functions, they rely on the same underlying physical principle, Faraday’s Law of Induction. During the early nineteenth century, Michael Faraday’s contributions to the study of electricity and magnetism were unparalleled. Despite having a formal education and despite the fact that the empirical study of physical phenomena was a new field of study, Faraday is one of the most influential scientists in history.

Faraday’s monumental discovery includes the magnetic fields interaction with electric currents which create an electromotive force. This has opened the door to modern electric technology that we take for granted. Faraday’s law of induction is the principle behind transformers, electric motors, generators, inductors and solenoids. Without this knowledge, we would not be able to develop reliable equipment for generating electricity to the grid. We wouldn’t have electric motors to power other machinery and the electrodynamics developed by Faraday and Maxwell were also a major catalyst for Albert Einstein’s theory of Special Relativity.

Electric motors and electric generators, regarding their functions are quite distinct from one another, however, they are similar in other ways. Both rely on the same underlying physical principle and understanding these is instrumental in the development of the most commonplace modern technology.

When it comes to gas generators, at Bellwood Rewinds, we offer a range of practical and cost-effective gas generators. They are a great alternative to pressurised gas cylinders, dewars or bulk storage or laboratory gas. These traditional sources of gas all involve on-going deliveries, administrative and rental costs which can affect revenue or facility budgets.

One of our generators will ensure you receive a dependable, easy to use, on demand gas solution without any safety problems or concerns. The price of delivered gas is unstable and fluctuates, the risk of delivery delays can also cause problems, so with Bellwood Rewinds, you really are choosing the stable and dependable long-term investment.

The benefits of our new generators…

    • Convenience – gas-on-demand, no cylinders to change, maintainable stock supplies.
    • Consistency – consistent gas quality and supply, no impurities or chance of running out.
    • Economy – stops the on-going costs of cylinders and manages lifetime running costs.
    • Safety – no risk of having pressurised and compressed cylinders.
    • Green – energy efficient as there’s no repeat gas deliveries.
    • Protection – comprehensive on-site warranty and service contracts.

Gas generator

Gas generators are convenient, they produce gas on demand with consistent purity. They’re compact and stackable with the ability to provide a number of different gases. Once the system has been fully installed it will only need maintenance occasionally.

Gas generators are a great return on investment, due to their low ongoing costs and 24/7 has production operations.

This option is very safe due to its minimal gas storage volume and low pressure storage.

They also have low impact on the environment as they’re energy efficient and reduce the carbon footprint.

Gas cylinder

Cylinders need monitoring to ensure they don’t run out of gas, they’re also difficult to maneuver and need frequent handling. Large cylinders or dewars tend to take up a lot of space, meaning valuable work space is used up. Depending on the usage the cylinders may need frequent change overs.

The purity from a gas cylinder is less consistent to that of a generator, the cost of deliveries and rental costs can add up meaning they’re less cost efficient. These cylinders require changeovers which can mean there’s a lot of downtime, there’s also the risk that they’ll run out at inconvenient times.

Gas cylinders can pose a health and safety risk due to dangers when transporting and handling them. There’s also a risk of pipework leaks from cylinder banks, due to the gas being stored at high pressures in large volumes.

To ensure the compression and purification of the gas it uses a lot of energy.

Gas generators from Bellwood Rewinds

At Bellwood Rewinds we offer a range of new gas generators available to buy online, the Bellwood Rewinds team have you covered from every angle. Whether you are looking for new generators of around 10Kva, 20Kva, 50Kva, 100Kva, 250Kva or 500Kva we will be able to help you along the way.

Simply call our team today and we can discuss the different options available to you, as well as options for finance packages. If you are looking for new generators, be sure to browse through our product range below and find a new generator to suit your needs.

With the warmer and dryer weather on the way, many of you are beginning to plan and organise summer events, with the list being endless and including fetes, fayres, concerts, networking, sporting events, weddings and gigs.

Whether it’s a children’s party with a bouncy castle or a concert with a heavy metal band, you’re going to need to make sure you have the right equipment to ensure the event is a success.


  • Business Events – if you’re organising a conference, board meeting or an outdoor team building event that requires power, you should consider generators. For example, the heat could get to much for an intense business conference so you should consider providing air conditioning.
  • Concerts, Festivals and Outdoor Gigs – If you’re interested in the arts and are keen to showcase them, an outdoor generator is obligatory, these types of performances need a trustworthy source of power so there’s no risk of the show being ruined by technical faults.
  • Sports – Whether its horse racing, a golf tournament or a football match, generators can be used for a range of tasks.
  • Weddings – Outside weddings are known for being beautiful, whether it’s a golden beach or a picturesque forest, or even in a marquee, the options are endless but a generator will be required.
When choosing a generator for your outdoor event, there’s a few things to consider….

Fuel – there are two types, diesel and gas, gas generators are more environmentally friendly, which is something else to think about, there will be different instructions on each type of generator based on the fuel they run on so this is also something to bare in mind.

Power source – when choosing a generator, discussing the power source with a certified professional will help you to determine what product you’ll need. They’ll consider the type of event and other influential factors include the industry, safety and so on. When deciding on a generator you should put together a checklist which includes all the items you’ll be using the generator for, verifying the number of watts for each item and also what numbers of KW or KVA you get when adding the requirements together. The generator supply company will then provide advice on what type you’ll need, but it’s still a good idea to get an electrician to double check you have the right generator.

Installation and use – It’s vital that you maintain safety at all times when using a generator, even though they are built to be safe they still need to be treated with caution. It’s important that you always store your generator outside, failure to do so and you are risking carbon monoxide poisoning, electric shock and other life threatening situations. When installing the generator you should work alongside a professional, ensure that you ask the generator supplier to provide a specialist with the equipment. If you are using the generator to power appliances, make sure they are plugged in directly through an extension cord, ensure the watts are equal to the sum of watts of the appliances that are connected. Some other tips to ensure generator safety is to keep it away from rain and water, store the generator fuel in a safe container and always get a professional to help in case something unexpected occurs.

In case of an emergency – If there happens to be a power cut ensure that you immediately unplug any electronics to avoid short circuits, if a storm has caused the outage, then ensure you stay far away from any electronics that have been touched by water.


Outdoor events can be brilliant, regardless of the concept, planners should be encouraged to seek opportunities for organising events outside whenever they can, especially if the weather is good. You should always be accountable and do your best to ensure the safety of all those present, the best way to reduce risks is to hire a generator from a professional.

Always ask for specialised help when you need it the most, there’ll always be someone there to lend a helping hand by offering quality services, aiding you to create the perfect environment for a memorable event in the great outdoors.

At Bellwood Rewinds we provide a wide selection of new diesel and new gas generators, our products range from 10Kva up to 500Kva, ensuring you can find the right generator for your event. Our certified specialists have a wealth of knowledge when it comes to generators and will support your decision every step of the way, talking you through your options and helping you to make an informed decision.


For more information on our generator products and services, contact a member of our team today.

I have used Bellwood Rewinds for many years to carry out motor and generator repairs, as well as supplying hire generators. I find them very helpful and most of all on time every time even on matters of an urgent nature. I would have no concern with recommending their services to anybody.
James Simpson
James Simpson
08:56 16 Nov 17
Fantastic company to deal with and great customer service, I would highly recommend!
Mike M
Mike M
08:59 19 Jan 18
Couldn't have asked for a better service from Bellwood Rewinds. Would definitely use again in future, and will most definitely recommend to others within the industry who are looking for quality customer service with a smile.
Lee Harris
Lee Harris
14:01 19 Jan 18
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