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Mark Armstrong – Solar PV Installation

3.52kW JA Solar PV System

Sustainable Energy Engineering Ltd supplied and installed a high-efficiency 3.52kW solar PV system for Mark Armstrong. The system features premium Aiko 440W all-black solar panels and a highly efficient FoxESS inverter, delivering excellent performance for a compact domestic installation.

The project also included bird protection and the removal of an existing solar thermal panel. The final system ensures strong long-term savings and improved energy independence for the homeowner.

Technical Information:

Solar Panel Brand & Model:AIKO Neostar 2S 440W
Number of Panels:8
Inverter:FoxESS F3600-G2 (3.6kW)
Mounting System:Renusol Roof Mounting Kit
AC Isolators:2
Generation Meter:OFGEM Approved
Bird Protection:Steel Mesh Kit
Additional Work:Removal of solar thermal panel & pipework closure


Installation Data

Installed Capacity3.52 kWp
Panel Azimuth10°
Inclination30°
Postcode Region10
Kk Value902
Estimated Annual Output3,180 kWh
Annual Electricity Use (Assumed)5,234 kWh
PV Self-Consumption1,397 kWh
Grid Independence27%


Utility Cost Comparison

Monthly Bill (Before Solar)£127.29
Monthly Bill (With Solar)£75.96
Annual Bill (Before Solar)£1,527.47
Annual Bill (With Solar)£911.52
Estimated Annual Savings£615.96


25-Year Financial Summary

Net Present Value (NPV)
The Net Present Value is the present-day value of all future energy savings minus the total system cost. Because money loses value over time due to inflation, all future savings are discounted. A **positive NPV** confirms that the investment delivers a strong financial return.

NPV: £11,298.36
Discounted Payback Period
This metric calculates how many years it takes for the system to pay for itself using *inflation-adjusted* savings. This is more accurate than simple payback and typically slightly longer.

Payback Period: 7–8 years
Internal Rate of Return (IRR)
The IRR is the interest rate at which the NPV becomes zero. Put simply: the **higher the IRR, the better the investment** — and solar consistently outperforms many traditional financial products.

IRR: 15.5%

Cut Your Energy Bills - Start Today.

2,000+ Solar Installs Completed in the North East.

CALL 0191 340 7001


View more of our solar case studies.

We've helped homeowners across the North East cut energy bills and reduce carbon emissions with bespoke domestic solar systems, from family homes to larger residential properties. Alongside this, we've delivered projects for schools like Cragside and Dame Dorothy, community hubs such as Kibblesworth Millennium Centre and Alnwick Community Centre, local cafes, churches, and even national brands like Burger King. With major installs for organisations including Darlington College, Phillips Pet Supplies, and Collingwood Healthcare Services, our portfolio shows proven expertise across both domestic and commercial solar - providing tailored installations that deliver long-term savings and sustainability.

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To design and size your solar and/or battery system correctly, we need to know your annual kWh usage. This allows us to create a system that accurately matches your energy needs - reducing the electricity you buy from the grid, lowering your carbon footprint, and protecting you from rising energy costs so you save as much money as possible.

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"Sustainable Energy Engineering is based in North England and offers a comprehensive solar panel installation service. The family-run business has more than 20 years of experience and is TrustMark registered, which means homeowners who are taking advantage of the UK's solar incentives can use Sustainable Energy Engineering as their certified installed."


Meet the Team


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With hundreds of five-star reviews since 2006, Sustainable Energy Engineering has built a reputation for quality, honesty, and reliability. Unlike many short-lived installers, we're here for the long haul - ready to support you long after installation. That's why so many customers choose us after their original installer disappears. Choose us for peace of mind, fair pricing, and expert solar solutions that last.