Tips for choosing the right generator for the job

Winter’s here – so you likely have greater use for generators. Severe weather means power outages are more frequent. Likewise, during the darker months, there’s more need to power lights to keep your spaces brightly lit. Or perhaps you work in an area without power supply. Whatever the case, a generator can support your needs.

Here’s a run down of factors to consider when choosing the right one for the job.


Generators are typically categorised by KVa (volt amps). As a guide, 5KVa = 5000 Watts. Plan ahead and make a list of the key components to gauge your power needs, leaving a bit of a buffer.

A helpful guide for some equipment you may use:

1. Drills: 800-1200 watts

2. Laptop: 60 watts per hour

3. Kettle: 1800 watts

4. Lighting: 500-1000 watts

Total: Approx 4400 Watts / 4.4KVa

Recommended generator: 5KVa+

Again, the more power you require, the bigger the generator – so make sure you’ve got enough space for it!


It’s important to ensure you’re able to fit a generator on site and know how big each one is: 

Our 2.7KVa; this petrol-powered generator is small and will fit into a good sized boot and hatch-back; it’s easy to transport and ideal for powering small tools and appliances

Our 3.4KVa is our top-seller; highly portable, it will also fit into a good sized boot and hatch-back, and is ideal for more demanding power tools

Our 6KVa is equivalent size to two washing machines, so you’ll need a van with a tail-lift and strapping points to transport it safely; it can power lots of different equipment such as a fridge, water heater and tools, meaning you can run several items at the same time

Our 10KVa, which is larger and more powerful, is an equivalent size to a large dining room table so you’ll need a transit with tail-lift to transport it; great for powering site containers and bigger spaces with office units attached

Beyond this core range we can supply generators up to 100KVa.

Our larger generators (5KVa+) all come with wheels, so even the heaviest ones are easy to move around transport.


Sites close to residential areas and busy areas need to take this into account. The bigger the generator, the quieter it tends to be. We supply ‘silent’ or ‘super silent’ generators, such as this 6KVa Diesel, which means less disruption and disturbances in your surrounding area. Although not 100% silent, they’re ten times quieter than a standard.


Generators can run on a number of fuel sources. The most popular fuel type for powering larger generators is diesel. They tend to be more cost efficient, more readily available, and operate best in very cold conditions. They’re also most effective when running consistently heavy loads – which is why it’s important to choose the right size (and power) for the job at hand.

Petrol-engine generators are better for smaller jobs, and cheaper to hire. These tend to be nosier – however, we stock a small, silent compact one, that’s ideal for small DIY jobs.

At Alliance Tool Hire we are committed to reducing carbon impact, so we are currently testing alternative fuel sources like solar and propane – watch this space!

Give us a call!

Whatever you need yours for, we’re here to help. If you want to hear more information about the generators we offer, click here to find your nearest Alliance branch and give us a call. We also arrange for the transport and delivery of your generator to each location.

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