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Mr Gibson – Solar & Tesla Powerwall Installation

8kW Solar PV System with Tesla Powerwall 3 & Expansion Battery

Sustainable Energy Engineering Ltd supplied and installed an advanced solar energy system for Mr Gibson in Washington. This project included an 8kW solar PV array combined with a Tesla Powerwall 3, a Powerwall expansion battery, and a Tesla Gateway for automatic EPS backup.

The installation significantly boosts energy independence, provides seamless backup functionality, and maximises solar self-consumption through a combined 27kWh of usable storage capacity.

The customer originally approached a national installer but chose SUS Energy to ensure a reliable installation date and local support. Despite challenges with transferring the existing G99 application, the team completed the project successfully and on schedule.

Technical Information:

Solar Panel Brand & Model:JA Solar 500W
Number of Panels:16
Inverter:Tesla Powerwall 3 (11.04kW Built-in Inverter)
Battery Storage:Tesla Powerwall 3 (13.5kWh)
Additional Battery:Tesla Powerwall 3 Expansion (13.5kWh)
Total Usable Storage:27 kWh
EPS System:Tesla Gateway Automatic Changeover
Mounting System:Renusol Roof Mounting Kit
Additional Components:Bird Mesh, AC Isolators, Generation Meter


Installation Data

Installed Capacity8 kW
PV Split5.5 kW + 2.5 kW
Orientation30° & 60°
Inclination30°
Postcode Region9E
Kk Values871 & 808
Estimated Annual Output6,810 kWh
Annual Consumption (Assumed)6,000 kWh
Self-Consumption (PV Only)2,428 kWh
Self-Sufficiency (PV Only)40%
Usable Storage for EESS27 kWh
Self-Consumption (PV + Battery)5,066 kWh
Self-Sufficiency (PV + Battery)75%


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.

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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."


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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.