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Standby Power Generators

... diesel, natural gas or petrol

UPS Systems has been supplying generators since 1993. We offer the UK's widest range of standby power generators from small portable 5kVA units to super-powerful 2MVA gen-sets. 

We provide matched UPS and generators; switchgear and AMF panels; generators for hire or on standby; fuel tanks and re-fuelling services; generator maintenance, health checks and load bank testing; repair services and generator remote monitoring.

We supply generators where large battery banks are to be avoided because of size, cost or weight. Usually, where runtimes of more than half a day are required, a generator is the answer.

Generators can be matched to UPS or multiple generators can be synchronised to enable their outputs to be connected; this is useful where you'd like a spare generator to provide full standby power support, even during generator maintenance or testing.

Many people miscalculate when trying to size the generator power they require. This can be a daunting process and, without expert knowledge, can create an expensive problem. Factors such as surge current, synchronisation, harmonics, operating temperature and future capacity need to be considered.

To discuss your requirements, please call our sales engineers on 01488 680 500, complete our Contact Form or leave your details for a Call Back - we’d be delighted to help.

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Generator fuels

A wide choice of fuel is available. Diesel is the usual choice, for its low flammability, low cost and stability over time. Natural gas is a regularly used alternative where available, although the engine is de-rated to accommodate the lower calorific value of gas over petrol or diesel.

Where it's neither easily possible to situate an oil tank nearby, nor use natural gas, then bottled gas is an alternative. Petrol is rarely used, except in very small generators, owing to its volatile nature and tendency to degrade when stored. Aviation fuel can also be used for gas turbine powered generators.

Generator Emissions

All internal combustion engines produce carbon monoxide (CO) emissions and noise. Noise can be silenced to an acceptable level for use outdoors in residential areas, or even for use in an office environment on some small sizes (<10kVA), but in both cases exhausts must be vented outside. This is not always possible in high-rise offices, which is why Fuel Cell systems are emerging as a viable alternative in these situations.