Case Studies

The Challenge

This customer's new build in Surrey presented a straightforward brief but a genuinely complex design task. The house had a large flat roof with the capacity to support a substantial solar installation, and the household's annual electricity demand of 10,000 kWh, combined with an EV to charge, meant that a well-designed system could cover a significant proportion of that demand. The question was how to get the most generation out of the available roof space.

Introduction

Wolverton Swimming and Fitness Centre in Milton Keynes faced the same problem that every leisure facility in the UK is grappling with: an enormous, unavoidable electricity bill that keeps climbing year on year. In 2025, the centre worked with Spirit Energy to install a 377.97 kWp rooftop solar PV system to take a meaningful chunk of that bill off the books, and to lock in a degree of price certainty for the next 25 years.

This customer had a well-performing solar PV system installed under the Feed-in Tariff scheme, generating around 3,000 kWh per year and delivering reliable FIT income for over a decade. With the solar side of the setup working as intended, the next step was to push further towards grid independence by storing surplus generation rather than exporting it. The property had also been experiencing semi-regular power cuts, so whole-home backup was an added priority.

Introduction

St Matthews Care Home, part of the B&M Care Homes group, has taken a significant step towards improving both its financial resilience and environmental performance through the installation of a large-scale solar PV system. With energy-intensive operations running around the clock, the home required a solution that could reduce reliance on the grid while delivering long-term savings.

System Overview

This installation combines a 10.56 kWp solar PV array with 27 kWh of battery storage (Tesla Powerwall 3 with an expansion pack and Tesla Backup Gateway 2).

Introduction

In 2025, St. Leonard's Care Home, part of B&M Care Homes, took a major step towards lower running costs and lower carbon emissions by installing a roof mounted solar PV system with Spirit Energy. The system includes 155 solar panels and is expected to generate 62,849 kWh of clean electricity each year. Here is what was designed, how it is set up, and what the numbers look like.

This residential property has taken a significant step towards long-term energy resilience by installing a large-scale solar and battery storage system. Designed to dramatically reduce reliance on the grid, the system delivers substantial electricity savings while providing a high level of energy independence for the household.

We have just completed work at a vast Aylesbury estate that boasts eight distinct solar arrays, three battery systems, three heat pumps, multiple electric-vehicle charge points and a wind turbine. Originally the site already hosted seven Tesla Powerwalls; we have now added twelve expansion packs, bringing total battery capacity to a staggering 305 kWh, a figure that places it among the largest residential battery installations in the UK.

Spirit Energy Install the First Tesla Powerwall 3 in the UK. 

In September 2020, Spirit installed an EV charging station at Porter Garland’s offices in Camberley. The company had recently purchased an electric car, taking advantage of the tax benefits for businesses.

In December 2019 Spirit installed a Rolec SecuriCharge unit for Nuvola in Swallowfield.

In November 2019, Spirit finished installing a complete system for Mr L in Maidenhead - solar PV, Powerwall 2, eddi and two zappi chargers.

In October 2019, Spirit commissioned an eoMini Pro charger at a house in Thatcham.

Mr E went for the eoMini Pro to take advantage of the £500 OLEV grant for smart chargers. The unit is small and discreet, and offers full monitoring via the app (shown in the image above).

In August 2019, Spirit installed its first zappi version 2 at a house in Reading.

In June 2018, Spirit installed and commissioned 6 Dual Socket EV chargepoints at St Giles Hotel in Heathrow, London.

In 2017, a private landlord contracted Spirit to upgrade the lighting in the communal areas of their property in Bishops Court, Slough. This consisted of replacing 46 existing fittings with a range of new LED lights.

July 2017 saw Spirit carry out a 30 fitting LED lighting retrofit for a commercial property in Newbury, Berkshire. NCR Bodyshops wanted existing highbay lights in their warehouse to be replaced with new 220W LED equivalents. 

In July 2016, Meika Ltd contracted Spirit Solar Ltd to install LED lights in its office and warehouse complex in Reading, replacing 125 existing light fittings and bulbs.

The new fittings range from 600mm x 600mm panels in the office and meeting rooms to 80W LED Corn lamps and 5ft tubes in the warehouse. 

Energy use will be reduced by up to 65%, with a total annual reduction in electricity use of just under 15,000kWh. The annual savings in running costs and replacement bulb costs will be £1,765+VAT; the project has a 3 year payback.

The installation will also improve lighting quality and reduce the need for maintenance of the lights. For example the panels give 35,000 hours service, which is 20 times the expected life of the existing fittings.