ROI in under 3 years for Porsche's 2nd system installation
Porsche's 2nd site installation with us has an ROI of just over 2 years and will reduce their dependency on the grid by 39.9%.
Hear it from
Porsche
themselves
We spoke with the client about their experience with Sustain Commercial Solar.
Key points:
Financial savings and earnings
Lifetime energy savings
British Pounds Sterling (£)
System cost
British Pounds Sterling (£)
Estimated ROI
Years
Average savings per week
British Pounds Sterling (£)
Average savings per month
British Pounds Sterling (£)
Average savings per year
British Pounds Sterling (£)
Energy production and grid reliance
Annual energy generation
kWh
Specific yield
kWh / kWp
Self sufficiency
Proportion of energy from the grid
Energy production and grid reliance
Equivalent trees planted
Trees
Lifetime carbon offset
kg of carbon offset
Average carbon offset weekly
kg of carbon offset
Average carbon offset monthly
kg of carbon offset
Average carbon offset yearly
kg of carbon offset
System Components
The system comprises 567 HTSAAE 405W Monocrystalline Modules and two 120kW Solax X3 Inverters, installed using a flat roof ballast configuration.
Annual Generation
The system is expected to generate 210,625 kWh per year, with a specific yield of 916.73 kWh/kWp. Out of this, 159,020 kWh will be self-consumed, while 51,605 kWh will be exported back to the grid.
Emissions and Grid Impact
The installation avoids 98,941 kg of CO₂ emissions annually and reduces the grid energy demand by 39.9%.
Financial Metrics
The total system cost is £226,450.32, with an ROI of 2.1 years and total lifetime savings projected at £2,035,247.39. This equates to an equivalent cost of £0.014 per kWh for solar utilised over the next 25 years.
ROI Breakdown
- Yearly Savings: Over a 25-year lifespan, the average yearly savings amount to £81,409.89.
- Monthly Savings: On a monthly basis, the savings are approximately £6,784.16.
- Weekly Savings: The weekly savings are around £1,565.57.
Installation and Performance
The installation was completed over three weeks in February 2023. The system boasts a performance ratio (PR) of 78.07% and a yield reduction due to shading of 8.0%. The level of self-sufficiency achieved is 39.9%.
Design Layout
The design layout of the PV system optimises space utilisation and maximises energy capture, ensuring efficient performance and long-term reliability.
Environmental and Economic Impact
This installation at the Porsche Centre in Tonbridge is a significant step towards sustainability. By reducing CO₂ emissions and grid dependence, Porsche not only cuts operational costs but also underscores its commitment to environmental responsibility.
Conclusion
The successful implementation of the solar PV system at Porsche Centre – Tonbridge highlights the expertise of Sustain Commercial Solar in delivering high-impact renewable energy solutions. This project provides substantial financial savings and contributes to a greener future, aligning with Porsche's sustainability objectives.
For further details and visual insights into the project, please refer to the attached documentation and images.
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Financial model used
This client opted for
CAPEX
as their financial vehicle.
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Our team
100+ years combined experience in solar and over 50,000 installations completed.
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