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

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Battery Retrofit Installation

Fox ESS EVO Kit with 10kWh Storage

Sustainable Energy Engineering Ltd installed a complete Fox ESS EVO battery retrofit system for Mrs Joughin. This upgrade allows the customer to store excess solar energy, reduce reliance on the grid and benefit from lower-cost electricity.

The all-in-one Fox ESS solution includes a hybrid inverter, integrated 10kWh lithium-ion battery and an automatic EPS gateway, providing backup capability in the event of a power cut. The system is designed for efficient operation, simple monitoring and long-term reliability.

Technical Information:

System Type:Fox ESS EVO Battery Retrofit Kit
Inverter:Fox ESS 5kW Hybrid Inverter
Battery Storage:Fox ESS 10kWh Lithium-Ion Battery (Integrated)
CT Clamp:Fox ESS CT Clamp
Connectivity:Fox ESS WiFi Dongle
EPS Backup:Fox ESS Gateway (Automatic Changeover)
Additional Components:Battery Warning Labels, AC & DC Cabling
Earth Rod:Existing rod in place — no new installation required
Commissioning:Full system testing and configuration


Project Gallery:

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.

Ready to switch to solar? Request a quote.

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.

Rated best in North England by the Independent.


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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


Your local trusted solar panel installer.

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.