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Project specification

  • Property type: Community
  • Technologies installed:
  • Size (kW): 12.19
  • New/retrofit: New build

As part of the development of their new building, the school wanted to install solar panels to generate electricity to improve their carbon footprint. Builders Durtnells and M&E engineers NRT were asked to find a suitable renewable energy installer to do the work and isoenergy was awarded the contract based on our previous record with both companies.

isoenergy quickly identified that there was a significant area of south facing roof on the new building situated within a valley. This is ideal for installing a solar photovoltaic system as the orientation and inclination help to maximise the output of the system without it being visible from the ground or other buildings.

The system consists of 46x 265W JA Solar modules giving a peak generation capacity of 12.19kW which generates approximately 10,500kWh of electricity per year. The on-roof panels are connected into a 10kW three-phase SMA solar inverter within the building which converts the DC current generated by the panels into AC current which can be used within the building and connected to the National Grid. As there is a high electricity usage within the building during daylight hours, the majority of the electricity generated is used onsite offering a direct saving to the school. Any excess is exported to the National Grid.

In addition to providing free electricity for the school to use, the system was commissioned before the end of March 2019, making it eligible for the Government’s Feed-in Tariffs (FiT) scheme. The FiT means the school receives regular payments for 20 years based on the amount of electricity generated.

The payments from the FiT and the savings from not having to buy so much electricity from the grid mean the solar panel system will have paid for itself within around eight years.

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