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Welch – Solar Installation (2025)

8kW Solar PV System with Fox ESS Battery Storage

This 2025 installation in Wheatley Hill, Durham features a split-array 8kW solar system paired with a Fox ESS KH8 inverter and EP11 battery module. The system was designed to suit a home-all-day occupancy profile with high annual consumption.

Two roof aspects were used to optimise yield across the day. JA Solar 500W panels were selected for high efficiency, and a steel bird mesh system was installed to protect the installation long-term.

Technical Information:

Solar Panel Brand & Model:JA Solar 500W
Number of Panels:16
Inverter:Fox ESS KH8 (8kW)
Battery Storage:Fox ESS EP11 (10.36kWh / 9.32kWh usable)
Mounting System:Renusol Roof Mounting Kit
Additional Components:Bird Mesh, AC Isolators, OFGEM Meter, Scaffolding


Installation Data

Installed Capacity4 kWp + 4 kWp
Orientation100° & 85°
Inclination30°
Postcode Region10
kWh/kWp694 & 743
Shade Factor1.0
Estimated Annual Output5,750 kWh
Annual Consumption8,000 kWh
Self-Consumption (PV Only)2,729 kWh (34%)


25-Year Financial Summary

Net Present Value (NPV)£23,384.84
Discounted Payback Period5–6 Years
Internal Rate of Return (IRR)20.6%


Product Warranty

JA Solar 500W Panels25-Year Product, 30-Year Performance Warranty
Fox ESS KH8 Inverter5 Years + Optional 5-Year Extension
Fox ESS EP11 Battery10 Years


Project Gallery:

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

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