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Case Study

HYMEC Aerospace (UK)

  • Solar PV
  • Total annual benefit C. £19,854
  • 20 year benefit C. £397,075

The Client

Established in 1978, Hymec Aerospace Manufacturing Group is considered to be one of the most progressive engineering groups within their industry.

The company has attained a formidable record for extensive manufacturing experience covering the
production of precision machined components, sheet metal and structural assemblies for incorporation into all types of industries – aerospace, defence, medical and telecommunications.

The company has continuously grown with the demand for its services, backed by a highly skilled workforce and experienced management team, striving to provide an exemplary service to their customers, whilst
minimising non value-added activity.

The Challenge

Late in 2018 IU Energy was requested to quote for the supply and installation of a 157.41kW PV system onto the 3 South West facing roof areas of the Hymec Aerospace building in Plymouth.

The installation was to be fitted prior to the end of March 2019 and before the ending of the Government’s Feed-in-Tariff scheme (FiT), enabling the client to receive financial support for twenty years.

The system was to be in accordance with Distribution Network Operator (DNO) supplier requirements, including connections and permits.

The Solution

The complete system consisted of 583 x BYD 270W polycrystalline modules, connected to 3 x Solis 50kW inverters, along with all the required electrical accessories (including generation meter, DC/AC Isolators), mounted onto a S:Flex Mounting system.

The S:Flex Mounting system is designed by its manufacturer to clamp straight onto the profile of trapezoidal roof sheets in order to provide resistance to wind loadings. The layout was also designed to ensure that skylights remained uncovered.

Each roof array was connected to its own inverter, which was mounted outside the mains electrical room on a purpose-built mount to ensure the maximum airflow for cooling. A generation meter was also installed as per the FiT requirements.

As always, IU Energy provided assistance to the client to complete the FiT application forms.

The Results

  • Projected annual earnings from FiT – £2,810
  • Estimated annual savings on electricity bill at 85% – £15,782
  • Projected annual earnings on export tariff at 15% – £1,262
  • Total projected annual benefit – £19,854
  • Total projected benefit over 20 years – £397,075

The ROI on the system is 13.11% with a payback period of 5.52 years.

The payback is representative of the first year only and does not take into consideration any increase in energy costs or the increase of the FiT due to the tariff being index linked to RPI. This will potentially result in the ROI being better than initially predicted in these calculations

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