Bespoke Fuel Storage

Whether you require a basic bulk fuel storage solution or a more complex fuel system as part of a wider project, your fuel tank will be fully integrated and maintained as part of the generator system. All our bulk fuel tanks are double-skinned as standard, and come complete with filler, a hydrostatic contents gauge, high & low level alarms & a bund alarm with options for 'pipe in pipe' and duplex-pumped fuel feed and return systems as well as any additional fittings available to your specification.

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Fuel Tank Design Options

Underbelly Fuel Tank

Underbelly Tanks

Containerised generator projects typically feature bulk fuel tanks underneath the enclosure to minimise the overall footprint.

Free-Standing Fuel Tank

Free-Standing Tanks

High capacity external free-standing tanks can be manufactured to your shape, size or capacity specifications.

Extended Base Fuel Tank

Extended Base Tanks

Off-the-shelf generator sets can be mounted on top of extended base tanks to increase the total fuel capacity.

Diesel Storage Tank Diesel Storage Tank Diesel Storage Tank Diesel Storage Tank

Bespoke Bulk Fuel Tank Benefits

Standard Features

We offer 2,000 to 50,000 litre tanks complete with high & low level monitoring, locking fill & electrical connection cabinets, leak detection & fire safety systems. All tanks are pressure tested, DEFRA compliant & specifically designed for safety, convenience and ease of maintenance.

Bespoke Options

Custom control & filtering options are available on both our compact & roller shutter type fuel tanks, including fuel filtering & remote management, as well as a number of additional fittings available on request to meet your project specification.

Roller Shutter Storage

Tanks from 10,000 to 50,000 litres are available with locking roller shutter doors, securely housing the fill point, fuel filters and electrical links.

What Capacity Fuel Tank Do I Need?

The most salient feature of any fuel tank is its capacity; If it does not hold enough fuel, your backup generator may run out before mains power is restored.

If you are using your generator as a back-up to the mains supply or to provide small amounts of power for short, discrete time periods you might not absolutely need a large fuel capacity. Selecting lower capacity tanks could mean a lower initial investment and potentially lower maintenance costs. However, you will require more frequent re-fuelling in smaller lots, which will increase the per-litre cost of the fuel and delivery by the vendor. Smaller tanks also limit your flexibility, in terms of your ability to run the generator for extended periods if it ever becomes necessary.

If you are using your generator as a primary power source for a large commercial or industrial establishment, or for almost any purpose where mains power is unreliable or unavailable, you will almost certainly need one or more large capacity fuel tanks. A larger tank allows you to buy fuel less frequently and in larger lots, reducing your ongoing running costs. However, it will cost more to purchase and install the larger tanks, and they will incur slightly more ongoing maintenance expenses. Storing a very large fuel supply may also impose certain safety risks.

Consider the following points when deciding on the optimal minimum storage capacity of your generator's fuel tank(s):


Emergency Fuel Needs

This is the amount of fuel you should allow to compensate for unusually high consumption or a delay is the arrival of new fuel.


Resupply Lead Time

This is the amount of time it takes to get new fuel to the generator site from discovering that your supplies are low. It includes purchasing fuel from a vendor, delivery, and actually filling the tank(s).


Lead Time Stock

This is how much fuel you should always retain to keep your generator running non-stop throughout the resupply lead time described above. That means the minimum amount of diesel fuel you should have on-site is your emergency stock plus your lead time stock.

Fuel Storage Planning Permission

Under certain conditions a fuel tank is considered 'permitted development' if it is within certain limits. That means that it would not require planning permission in most cases.

A tank would be considered permitted development so long as it does not:

  • Hold more than 3500 litres of fuel;
  • Stand forward of the principal elevation facing a highway;
  • Stand more than 3 metres tall, or 2.5 metres tall if within 2 metres of a property boundary;
  • Reside in an area which has heightened planning requirements, such as national parks or areas of outstanding beauty;

Read more on planning permission for fuel tanks

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For more information about our Bespoke Fuel Tanks

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