Case Study Thatched Property
Utilising available outbuildings
“we wanted to reduce our bills and this solution provides a great return on investment”
How Oxford Green Energy helped
Energy Use before installation
Annual Consumption. - 7,000kwh
Annual Cost - £1,939
Project Design
Solar PV Output pa -6,564kwh
Solar Utilisation - 34% (2,354kwh)
Solar Exported - 4,254kwh
SEG Income pa -£695
Solar savings - £659
Total Savings pa - £1,354
ROI (Return on Investment) - 19.4%
Life Time Savings (est.) - £67k
Survey and System Design
At survey we looked at a number of options to accommodate solar on this property.
The thatched roof isn’t possible so we looked at utilising the roofs either side of the main house.
We all agreed the aesthetics of the house would be compromised so we settled on utilising the available outbuildings.
We ran armoured cable from the two outbuildings back to the main property to connect to main consumer unit.
The roofs were too short to accommodate a typical 450w Solar PV panel so we used a higher output larger panel to maximise the solar generation from the available space.
We used an inverter that can accommodate three different arrays to maximise production and minimise losses. Overall a superb system that will provide Solar energy and savings for decades.
Daily Solar PV production estimate from proposed system
*image used from Opensolar.com, snipped from Online proposal specific to this project
The graphic below shows how the proposed system will impact current bill and provide an estimate of lifetime savings
Summary
this was an interesting project for us to install, since installation the bifacial panels appear to be boosting output from the reflective surface of the roof and generation is far exceeding our estimate.
We are delighted that the client is happy with the system and look forward to hearing about the system performance in the years to come
Thank you for reading
Steve
Director
Oxford Green Energy