Standby Generators For Sale
Standby generators for sale from 1kVA to 3,000kVA, available in an open frame or canopied enclosure depending on application. Generator Warehouse operate across a wide range of market sectors providing robust, efficient standby gensets to businesses in need of alternative or additional power sources. Read More
Showing 91–108 of 154 results
Standby Generators for Reliable Backup Power
A power cut can bring a business to a standstill. Computers shut down, machinery stops and essential systems can be left without power. A correctly sized standby generator gives you a dependable secondary power source, helping you keep important equipment running until the mains supply returns.
Generator Warehouse stocks standby generators for everything from smaller backup requirements to demanding commercial and industrial applications. With outputs ranging from 1kVA to 3,000kVA, our collection makes it easier to find a generator that suits both your electrical load and your site.
How Does a Standby Generator Work?
A standby generator is kept ready to provide electricity during a mains failure. Many systems are connected to an Automatic Transfer Switch, commonly known as an ATS. When the ATS detects a loss of mains power, it signals the generator to start. Once the generator is producing a stable supply, the electrical load is transferred to it.
When mains electricity returns, the system transfers the load back before allowing the generator to cool down and stop. This process can happen automatically, which is particularly valuable at sites that cannot rely on someone being present when an outage occurs.
ATS equipment is not necessarily included with every generator, so its availability and compatibility should always be checked before ordering.
Choosing the Right Standby Generator
Generator size should be based on what you need to power rather than the physical size of the building. Begin by listing the equipment that must continue operating during an outage, including lighting, heating, refrigeration, pumps, computers, security systems and production machinery.
You should also consider:
- The total running load of the connected equipment
- Higher starting currents from motors, pumps and compressors
- Whether the site uses a single-phase or three-phase supply
- The required runtime and fuel-tank capacity
- Available space, ventilation and access for servicing
- Noise restrictions and the proposed generator location
- Whether automatic operation is required
Choosing a unit with insufficient capacity can lead to overloading and unreliable performance. An unnecessarily large generator may cost more to purchase and run. If you are unsure, speak to our team before ordering and we can help you narrow down the available options.
Standby Power for Different Applications
Our standby generators can support a wide variety of settings, including:
- Offices, shops and other commercial premises
- Warehouses and distribution centres
- Farms and agricultural buildings
- Construction and engineering businesses
- Data and communications equipment
- Workshops and manufacturing facilities
- Residential properties and home offices
- Critical pumps, refrigeration and security systems
Every site is different. Some customers only need to protect a small number of essential circuits, while others require enough capacity to support an entire operation.
Browse Standby Generators for Sale
Explore standby generators from established manufacturers including Cummins, Perkins, JCB, Himoinsa, Pramac, SDMO, CAT and FG Wilson. Use the filters to compare options by brand, fuel type, price and kVA output.
If you cannot find the right model or need help calculating your required capacity, contact Generator Warehouse. Tell us what you need to power and we will help you identify a suitable solution.
What is the difference between standby and prime power?
Standby power is the output a generator can provide during an emergency mains failure. Prime power applies when a generator is used as a regular source of electricity for longer periods. Always check the manufacturer’s stated ratings when comparing models.
What size standby generator do I need?
The correct size depends on the total electrical load, the equipment that needs to run and any starting currents. Motors, pumps and compressors may require considerably more power when starting than during normal operation.
Can a standby generator be installed outside?
A suitably canopied generator may be installed outside where the model and site conditions allow. Positioning, ventilation, exhaust clearance, fuel storage, noise and maintenance access must all be assessed by a competent installer.
How often should a standby generator be serviced?
Follow the service intervals specified by the manufacturer. A generator should also be inspected and tested regularly so that problems are found before an actual power cut.