Case Study: Mr Duffy’s Solar and Battery Installation in Walderslade, Kent

Project Overview

Like many homeowners, Mr Duffy was worried about rising electricity bills. He wanted to take some control back, but not just to save money. Reliability was also important. If the grid went down, he wanted to know his family could keep the lights on. And if he could do all this while lowering his carbon footprint, even better.

Client: Mr Duffy

Location: Walderslade, Kent

System Size: 17.1 kW

Technology Installed: 9 LONGi solar panels + Tesla Powerwall 3

Estimated Annual Generation: 13,456 kWh

The Solution

After visiting the property and looking at Mr Duffy’s usage, our team designed a system that made sense for his home. We suggested pairing nine LONGi solar panels with a Tesla Powerwall 3.

The LONGi panels are efficient and reliable, with long warranties.

The Tesla battery gives storage, whole-home backup, and a simple app to track everything.

The system size came in at 17.1 kW, expected to generate around 13,456 kWh each year.

We also included surge protection, which keeps the house safe from power spikes.

The Installation

The whole job was handled by our in-house team, from design to final handover. That meant there was no confusion with subcontractors,  just one team managing the project.

The Outcome

The system now covers most of Mr Duffy’s energy needs. During the day, solar panels run the home, and any excess is stored in the Tesla battery for use later. The Powerwall also provides backup, so the home is protected during power cuts.

Benefits so far:

Reduced electricity bills.

Less reliance on the grid.

More sustainable energy use — over 13,000 kWh of clean power a year.

Long-term peace of mind thanks to strong product warranties.

Why He Chose Us

Mr Duffy wanted an installer with experience and a track record. A few things gave him confidence in TLGEC:

We’ve been installing since 2010.

We work only with trusted manufacturers like Tesla, LONGi, and SolarEdge.

We’ve been a Which? Trusted Trader since 2014.

Everything is done in-house, not outsourced.

Hundreds of positive reviews from other homeowners across the South East.