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Mr Bates – Solar PV & Battery Storage Installation

5kW Solar System with Fox ESS Mira 7.37kWh Battery

Sustainable Energy Engineering Ltd supplied and installed a 5kW solar PV system with Fox ESS Mira-HV25 HS7.5 battery storage for Mr Bates. The installation included Tigo optimisers to reduce the effect of shading and improve generation efficiency, making the system suitable for properties with partial shading throughout the day.

The project included full DC and AC protection, roof mounting, scaffold access and bird protection mesh. This system now provides reliable solar generation, improved self-consumption, and strong long-term financial returns.

Technical Information:

Solar Panel Brand & Model:JA Solar DeepBlue 4.0 Pro 500W
Number of Panels:10
Inverter:FoxESS H1/AC1 G2 H1-3.7-E-G2 (3.68kW)
Battery Storage:FoxESS Mira-HV25 HS7.5 (7.37kWh / 6.63kWh usable)
Mounting System:Renusol Roof Mounting Kit
Optimisation:4 × Tigo Optimisers (reduces shading losses)
Additional Components:Bird Mesh, AC Isolators (x2), Generation Meter, Mobile Scaffold


Installation Data

Installed Capacity5 kWp
Orientation70° from South
Inclination30°
Postcode Region10
Kk Value790
Shade Factor0.86
Estimated Annual Output3,400 kWh
Assumed Annual Electricity Use2,400 kWh
Self-Consumption (PV Only)1,024 kWh
Self-Sufficiency (PV Only)43%
Usable Battery Capacity6.63 kWh
Self-Consumption (PV + Battery)1,574 kWh
Self-Sufficiency (PV + Battery)69%


Utility Costs

Average Monthly Bill Before Solar£68.25
Average Monthly Bill With Solar£6.48
Annual Bill Before Solar£819.00
Annual Bill With Solar£77.74
Estimated Annual Savings£741.26
Bill Reduction91%


Financial Summary

This installation includes a detailed long-term financial assessment to help homeowners understand the economic benefits of solar and battery systems.

Net Present Value (NPV) £13,209.22
A positive NPV shows this system returns more value over 25 years than it costs to install, even after adjusting for inflation.
Discounted Payback Period 9–10 years
This indicates how long it takes for the investment to fully pay for itself after accounting for discounted future cashflows.
Internal Rate of Return (IRR) 13.1%
A strong IRR, showing the system performs better than many traditional investments or savings products.


Project Gallery:

Cut Your Energy Bills - Start Today.

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

CALL 0191 340 7001


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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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