Hybrid Power Supply

The local constraints of this project mean that the site accommodation area could not be provided with a permanent mains power supply. As part of energy reduction initiatives the decision was taken to use battery packs to accompany the generators that would power the site. The battery packs would allow the site to utilise hybrid power and the site to be powered by battery at periods of low demand in order to reduce generator running time.

One of the challenges of running this site, is that the works continue for 24 hours, with both night and day shift. The use of this system has shown that with careful planning, benefits of hybrid power can be utilised for most situations. The battery packs have a potential run time of up to 10 hours depending on demand.

Since going live on the A46/A5630 works in September last year, the solution has already reduced fuel consumption by over 35,000 litres, and cut CO2 emissions by over 94 tonnes – the approximate annual emissions of 59 diesel cars in the UK. Compared to using a standard generator the solution has also provided a net saving to the contractor of over £6,000 over the period to the end of December.

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