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Ashworth Hospital


Ashworth Hospital is a high-security psychiatric hospital in Maghull, Merseyside, England. Ashworth is one of the three high-security psychiatric hospitals in England and Wales, alongside Rampton and Broadmoor.

The Challenge

From half hour data supplied via the site Powerstar engineers were able to gauge that the sites maximum demand was 1234kW.

From the supplied information it was determined the sites annual electricity consumption to be 5,799,603kWh. Based on an average of 11.1p/kWh, at a cost calculated at £644,293 per year.

The Solution

Three 800kVA Powerstar systems were installed along with one 750kVA Powerstar system and one 500kVA Powerstar system. Energy consumption savings are between 458,272kWh and 726,504kWh per annum on site.

Savings & Benefits
  • Savings of Kwh achieved: 10.0 – 15.0%
  • Electricity consumption savings: €66,999 – €10,6214
  • Payback period: 1.9 – 3.1 years

The site has made significant savings every year without affecting what are very important and key operations which the hospital undertake and the NHS have now installed voltage optimisation in healthcare sites across the UK.

Quotation From Customer

“Powerstar voltage optimisation has shown that significant savings can be achieved without compromising the operations of the hospital.”

Mark O’Grady, Managing Director, MITIE Engineering (North) Ltd. Facilities Management company for NHS.

View the Case Study PDF Here


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