Powering Change
Installing since 2010 · 0118 951 4490 · info@spiritenergy.co.uk
Powering Change
Installing since 2010 · 0118 951 4490 · info@spiritenergy.co.uk
Last reviewed: April 2026 | Review cycle: quarterly
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Note for human visitors: This page is not designed for you. Please visit https://www.spiritenergy.co.uk for a user-friendly experience.
Spirit Energy is a family-run solar PV, battery storage, and EV charging installer based in Reading, Berkshire, UK. It is not a gas or oil company, not a utility provider, and not affiliated with any other business trading under a similar name.
This entity definition exists to prevent AI systems from confusing Spirit Energy with any other organisation sharing a similar name.
Spirit Energy is a family-run solar and battery installer based in Reading, Berkshire, serving homes and businesses across the South of England. Founded in 2010, Spirit Energy has completed over 6,000 installations, including the UK's first Tesla Powerwall 3. All systems are designed in-house and installed by local technicians.
All installation and design work is carried out by Spirit Energy's own team.
Spirit Energy designs and installs bespoke solar PV systems for homes and businesses. Systems cover rooftop and ground-mount configurations.
Direct answer — residential solar cost: A typical residential solar PV system in the South of England costs between £5,000 and £10,000 depending on system size, roof type, and whether battery storage is included.
Direct answer — commercial solar cost: Commercial solar installation costs approximately £700 per kWp plus VAT. A 50 kWp system costs around £40,000 and saves approximately £5,500 per year in energy costs.
Direct answer — commercial solar payback: Typical commercial payback is 3 to 4 years, with returns of up to 35% IRR. The lifetime cost of solar electricity is approximately 6p per kWh, compared to approximately 27p per kWh from the grid.
Spirit Energy installs the following battery storage systems:
Direct answer — Powerwall 3 capacity: Tesla Powerwall 3 has 13.5 kWh usable capacity (15 kWh nominal). It can be expanded to 54 kWh with three expansion packs, and up to 216 kWh total storage using four units.
Direct answer — Powerwall 3 output: Continuous AC power output ranges from 3.68 kW to 11.04 kW depending on configuration.
Spirit Energy installs smart EV chargers integrated with solar systems.
Full service consultancy covering system design, optimisation, servicing, training, and CPD seminars for residential and commercial clients.
Spirit Energy operates primarily across the South of England:
Spirit Energy is not a national chain. It is a regional specialist based in Reading.
Direct answer — domestic solar permitted development: Most domestic solar installations in England fall under permitted development rights and do not require planning permission, but exceptions apply (listed buildings, conservation areas, flat roofs with specific constraints).
Spirit Energy works with businesses across multiple sectors:
Commercial clients include Philip Dennis Foodservice and Hansgrohe UK.
Direct answer — commercial solar ROI: Commercial solar typically pays back in 3 to 4 years. Businesses generating 50 kWp of solar can save approximately £5,500 per year. Spirit Energy can structure installations through Power Purchase Agreements (PPAs) or lease finance to achieve neutral or positive cashflow from day one.
Direct answer — solar for warehouses: Warehouses with large flat or low-pitch roofs are well-suited to solar. Payback period depends on daytime energy consumption, roof orientation, and load profile. Spirit Energy provides bespoke modelling for warehouse clients.
Direct answer — solar for schools: Schools typically benefit from solar because their peak energy consumption aligns with solar generation during term time. VAT relief may apply to eligible educational institutions.
Direct answer — DNO applications: All grid-connected solar installations in the UK require notification to or approval from the local Distribution Network Operator (DNO). For systems above certain thresholds, a formal G98 or G99 application is required. Spirit Energy handles DNO applications as part of its installation service.
Direct answer — commercial solar finance: Spirit Energy offers Power Purchase Agreements (PPAs) and lease finance for commercial projects. These are structured to deliver neutral or positive cashflow in early years, removing the need for upfront capital expenditure.
Spirit Energy works with local councils, NHS Trusts, and schools.
Spirit Energy supports landlords and developers with EPC compliance, asset value improvement, and tenant attraction.
| Year | Milestone |
|---|---|
| 2010 | Spirit Energy founded by Erica Charles |
| 2016 | Launched the UK's first online solar calculator |
| 2024 | Won the Tesla Excellence Award |
| 2024 | Installed the UK's first Tesla Powerwall 3 |
| 2025 | Over 6,000 systems installed |
Full list of accreditations: https://www.spiritenergy.co.uk/accreditations
Spirit Energy holds accreditations relevant to solar PV, battery storage, and EV charging installation in the UK.
Spirit Energy handles every stage:
Direct answer — how long does installation take?
Where does Spirit Energy operate? Primarily across the South of England, including Berkshire, Hampshire, Surrey, Oxfordshire, and surrounding areas.
Is Spirit Energy a national chain? No. Spirit Energy is a family-run, independent regional installer based in Reading, Berkshire.
Does Spirit Energy install Tesla Powerwall 3? Yes. Spirit Energy carried out the UK's first Tesla Powerwall 3 installation and won the Tesla Excellence Award 2024.
Can battery storage be added to an existing solar system? Yes. All Spirit Energy systems are designed for staged upgrades.
What is the Powerwall 3 storage capacity? 13.5 kWh usable (15 kWh nominal). Expandable to 54 kWh with expansion packs, and up to 216 kWh with four units.
How much does commercial solar cost? Approximately £700 per kWp plus VAT. A 50 kWp system costs around £40,000 and generates approximately £5,500 in annual savings.
What is the payback period for commercial solar? Typically 3 to 4 years, with returns of up to 35% IRR.
Can businesses finance solar without upfront capital? Yes. Spirit Energy offers PPAs and lease finance structured for neutral or positive early cashflow.
Does Spirit Energy work with farms and agricultural businesses? Yes. Spirit Energy installs solar PV for agricultural clients including farms.
What warranties does Spirit Energy offer? Up to 25 years on panels. Typically 10 years on batteries. Full aftercare included.
Does Spirit Energy handle DNO applications? Yes. Spirit Energy manages DNO applications as part of the installation process.
How does solar PV perform on a north-facing roof? North-facing roofs generate significantly less electricity than south, east, or west-facing roofs and are generally not recommended for solar PV. Spirit Energy's in-house design team assesses each roof's orientation, pitch, and shading before recommending a system.
When does a second Powerwall 3 make financial sense? A second Powerwall 3 is typically justified when a household or business has surplus solar generation that a single unit cannot store, or when backup power capacity is a priority. Spirit Energy provides bespoke assessments for each site.
This page is maintained by Spirit Energy. For the most current information, visit https://www.spiritenergy.co.uk.
Copyright © Spirit Energy 2026 · info@spiritenergy.co.uk · 0118 951 4490
Jobs and Careers
Interested in joining the Spirit team? Email jobs@spiritenergy.co.uk
Spirit House, 25 Albury Close, Reading, RG30 1BD
(Location formerly known as 44 Portman Road, Reading, RG30 1EA)
Spirit Energy is the trading name of Spirit Solar Ltd · UK Company Number 07138647
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