Help centre
Dale Power Solutions

Open set generators

Dale has a full range of open set generators to support your organisation keep you critical systems running with a backup power supply should there be a break in your power.

Our open set generator range

Available from 50 kVA to 3,000 kVA, Dale’s open set generators can support a wide range of power requirements. Our expert team of engineers and project managers can design and install a generator suited to the location be that a basement or a plant room. We’ll work with you to consider ventilation and access requirements as well as your power needs and desired fuel source.

Open set generator
Open Generator 20 - 100kVA

20 - 100kVA

Open Generator 101 - 600kVA

101 - 600kVA

Open generator 601 - 1000kVA

601 - 1000kVA

Open generator 1001 - 3000kVA

1001 - 3000kVA

Need advice? Get in touch

Open set generator

What is an open set generator?

An open set generator does not sit within a protective structure and needs to be housed at an indoor location. They have a steel base frame design with or without a base frame fuel tank depending on the requirements. They are powered by a high speed industrial engine and benefit from an integral control panel and outgoing circuit breaker. Industrial 4 pole excited alternators provide high reliability of operation and output. With integral radiator units and full EC guarding protection it supports their use for indoor applications.


Yes we can, with the range of generators we provide we have the solution to match your need.

Put simply, yes. A generator service and/or UPS service can determine any existing and future power supply problems that could impact equipment performance. Planned and preventative maintenance can extend machine efficiency, assures optimal working conditions and conserves the life span of the equipment. Along with determining when replacements will be needed for a seamless transition, planned and preventative maintenance is a far cheaper solution compared to complete equipment replacement.

Generators are not a source for uninterruptible power therefore a UPS (uninterruptible power supply) bridges the gap between the two. As a critical power provider we can help you decide what is the best solution for your needs.

Electrical generators are pieces of critical power equipment that provide electricity when power from the power grid is unavailable. Interestingly enough, generators don’t actually create electricity. Instead, generators convert mechanical or chemical energy into electrical energy – by capturing the power of motion and turning it into electrical energy by forcing electrons from the external source through an electrical circuit. Once an electrical current has been established, it is directed through copper wires to power external machines, devices, or entire electrical systems.

When it comes to generators, size matters. Undersize a generator and you won’t be able to power your equipment; oversize a generator and you’re wasting money. To correctly size a generator, you should:

Make a list of the items that need to be powered by the generator.
Make a note of the starting and running wattage of the respective items.
Calculate the total power requirements in KVA or KW.

Convert kW to kVA:
For resistive load: Wattage = amperes x volts
For reactive load: Wattage = (amperes x volts) x load factor

Define your running requirements.
Analyse site conditions and access.
Our team can help with correct sizing to ensure your generator will meet both power and site requirements.

Nearly all electronic and electrical equipment, regardless of how well-designed and built it is, will eventually break down unless it is maintained according to the manufacturer’s instructions. Wear and tear is common with electrical equipment, but it has severe consequences for UPS systems and generators, where financial, reputation and potentially life-threatening damage comes into play. It is highly recommended that as a minimum you service your power systems annually in order to maintain its working lifecycle. Our service contracts include everything from AC maintenance, DC maintenance and generator maintenance through to analogue metering, intelligent monitoring, remote monitoring and spare parts, as well as callouts, minor fault fixes and access to our customer portal, where you can access management information reports and other key details on your power supply systems.

Without proper maintenance, generators can fall prey to failures and power outages. Generator manufacturers generally recommend that a generator should be serviced after the first year of installation and on an annual basis there on after. We also suggest carrying out regular visual inspections to keep on top of any faults within your generator that may require maintenance sooner than anticipated.

Factors that may result in more frequent maintenance include:

Exposure to extreme temperatures and weather can damage components of the generator.
Airborne contaminants such as dust and sand may infiltrate the generator, causing damage to its internal components.

Excess usage: Most diesel generators are designed to provide backup power. Should a standby generator be used for prime power, care should be taken to ensure the generator is inspected frequently and only used for as long as it is required.

Lack of usage: Similarly, if a generator is left dormant longer than expected, engine exercise should be carried out to avoid battery failure.

To comply with British Standards, the base material should be either:

Concrete at least 100mm thick.
Paving stones at least 50mm thick.
Stonework at least 50mm thick.

The overall size of the base should be larger than the oil storage tank and any integral oil storage tank bund, so that when the oil storage tank is installed, the base has a clear projection of a minimum of 300mm around all sides of the oil storage tank.

We have no doubt of your trained eye, but an OFTEC inspection provides assurance that your tank is fine, and can function properly. When exposed to the elements, steel pipes can rust, and plastic becomes brittle. Similarly, poor installation can put large amounts of pressure on the tank, leading to leaks and pollution. Having your oil tanks inspected will considerably reduce any risk, and leave you less liable should an issue occur.

As batteries go unused, with no charging schedule, their battery life will decrease. When it comes to the self-discharge characteristics of lead-acid batteries for example, it is important that they are charged after 6-10 months of battery storage. Otherwise, permanent loss of capacity will occur between 18-30 months.

A petrol generator is an alternative to diesel but typically used only for short periods. Greener alternatives include natural gas. These generators rely on underground access to natural gas. Another option is propane which is generally chosen when natural gas isn’t available.

Diesel generators

Diesel generators are those that are run on diesel, and can typically be divided into two basic parts: a diesel engine and an electrical generator. Diesel generators can be used to provide power to places that are not powered by a power grid or can be used as a backup in case of a power outage.

Natural gas generators

Natural gas generators use natural gas however, and are used in both emergency and portable generator types. They are one of the most affordable and effective fuels among non-renewable resources for power generation.

LPG generators

LPG (Liquid Petroleum Gas) generators have powerful engines that run smoothly and quietly while providing dependable power when you need it most.

Generator: Provides stand by power until the mains power can be reinstalled.

UPS (Uninterruptible Power Supply): Ensures a seamless transition from mains power to the standby power (generator).

Batteries: Provide the power to your UPS and Generator.

Severe actions can be taken against companies that have not complied to regulations including fines, associated costs of production loss and cleaning and imprisonment. These are based on several factors concerning the overall damage of the spill, number of litres spilt and the duration it took place and of course the direct and indirect impact on the environment. Records have seen fines reach in the region of c£8M in recent years.

There are lots of things you can do to prevent oil theft, such as:

  • Check the fuel levels regularly to make sure that none has gone missing.

  • Lock the tank. Most tanks can be locked at the inspection cover or a lockable filler cap can be retro fitted to existing oil tanks.

  • Install automatic movement sensor security lighting around the tank.