How do solar panels work and how much energy do they produce?

Solar panels convert sunlight into electricity using photovoltaic cells. When sunlight hits the panels, it excites electrons in silicon cells, generating DC electricity, which is then converted to AC by an inverter. On average, a panel produces 250–400 watts per hour, with a typical system generating 5–10 kWh/day.

How long do solar panels last?

Solar panels typically last 25–30 years and often include 20–25 year warranties. Their efficiency declines slowly over time, but they can still generate power well beyond their warranty period.

Are solar panels worth the cost?

Yes, solar panels are worth it for many homes and businesses. Though the upfront cost is high, they can significantly reduce energy bills, especially with government incentives and long-term energy savings.

How many solar panels do I need?

The number depends on your energy usage, sunlight availability, and panel efficiency. A typical UK home might need 15–20 panels for a 6kW system. A solar installer can provide an accurate estimate.

What is a solar battery?

A solar battery stores excess electricity from your solar panels for use later, such as at night or during outages. This maximises energy self-use and increases energy independence.

Is a solar battery the same as an inverter battery?

No, a solar battery is designed specifically to store solar energy. An inverter battery is typically used in backup power systems and may not integrate with solar generation systems.

Is a solar battery worth installing in the UK?

It can be, especially if you use energy during evening hours or face high electricity rates. However, costs can be high, so it's most beneficial if you also qualify for export tariffs or use lots of electricity.

Why have a battery with solar panels?

A battery allows you to store unused solar energy for later use, saving on bills, ensuring backup power, and increasing energy independence from the grid.

How does an off-grid solar system work?

An off-grid system works independently from the grid using solar panels, batteries, a charge controller, and an inverter. It requires careful sizing to meet your total power needs year-round.

How to calculate an off-grid solar system?

First calculate your daily usage, divide by sunlight hours to get system size, then determine the number of panels, battery capacity, inverter size, and charge controller requirements.

EV charging is the process of powering an electric vehicle using a charging station. Types include Level 1 (slow), Level 2 (faster), and DC fast charging (very fast, public stations).

What is solar PV and how does it generate electricity?

Solar PV uses photovoltaic cells to convert sunlight into electricity. Sunlight excites electrons, creating DC electricity, which is then converted into usable AC power by an inverter.

Which PV solar panels are best?

Top PV panels include Aiko, JA Solar, REC, and Canadian Solar. The best panel depends on efficiency, warranty, budget, and installation site. Consult a local expert for the right choice.

Powering a Sustainable Future Since 2010

We’ve been a trusted and dependable team for over 15 years

UK’s Leading Solar Installation Experts with 15+ Years of Experience

Q: How much electricity will my system generate?

Generation is measured in kilowatt-hours (kWh) and varies by system size, orientation, shading and location. We model your predicted annual yield using industry methodology and include it in your proposal. For panel choices and performance tips, see Choosing the Right Solar Panel.

Q: What warranties and guarantees are included?

Typical packages include module performance warranties (often 25 years), product warranties on modules and inverters, and an installation workmanship guarantee. We specify exact terms in your quote. Learn how we choose components in Expert Solar Installation Services and Renewable Power for Companies.

Since 2011 we’ve designed and installed high-performance solar PV, battery storage and EV charging for homes and businesses across the East Midlands and nationwide.

Spectrum Energy Systems Ltd is a nationwide renewable energy installation company serving Nottingham, Lincoln, Derby, Leicester and beyond, specialising in solar panel installations, battery storage, and EV charging. Through our sister company, Spectrum Wind Services Ltd, we also provide expert solutions for wind turbines across the East Midlands region.

Leading the way for 15 years, we are more than just a solar panel installation company; we’re your gateway to a greener, more efficient future.

Nottingham City Council decarbonisation grants - Learn more

Driven by Expertise, Backed by Experience.

We Deliver Excellence Every Time.

From Start to Finish, We’ve Got You Covered.

Delivering Comprehensive Services You Can Trust.

Tailored Solar Solutions for Your Unique Needs.

Empowering You with Sustainable Energy Choices.

Seamless Commercial Solar Solutions

From feasibility and yield modelling to DNO approvals and handover, we deliver turnkey commercial solar panel installation that maximises savings and minimises downtime. Our engineer-led designs cover warehouses, factories, offices and agricultural sites, with options for integrated battery storage and smart monitoring.

What’s included

Feasibility, roof survey and structural checks with shading analysis
Grid applications (G99/G100), export arrangements and full compliance
Bespoke mounting (pitched/flat roof, ground-mount, carport) with safe, CDM-compliant delivery
Bankable modules and inverters specified for efficiency and longevity
Optional commercial battery storage & back-up to increase self-consumption
Remote monitoring, O&M and performance optimisation

See how we deliver on complex builds and real-world savings in our solar case studies. Explore sectors and use cases on our industry solutions, or learn more about our installation approach in Expert Solar Fitting.

Reliable Domestic Solar Solutions

We make switching to solar power systems effortless for homeowners across the UK. From consultation through to installation and ongoing support, our expert team designs tailored solar installations that integrate seamlessly with your property, maximising efficiency whilst reducing electricity costs.

Our domestic service includes:

Hassle-free process – design, compliance and professional UK installation
Lower bills & energy independence – optimal system sizing and export options
Ongoing care – monitoring, servicing and inverter/battery support

Whether you require grid-tied systems or off-grid solar solutions, we empower your home with clean, renewable energy today.

Nationwide Network for Comprehensive Solar Services

Based in Nottingham with coverage extending throughout Lincoln, Derby, and Leicester, our team of fully trained engineers is ideally positioned to cover the entire UK with easy access to major motorways and transport links. This strategic East Midlands location enables us to deliver prompt, professional solar power panel installation services nationwide.

Why choose Spectrum?

Extensive Expertise

Design engineers and accredited installers with 15+ years’ experience. Our team consists of highly experienced professionals, supported by a skilled workforce passionate about renewable and solar technology.

Quality Assurance

We do not favour a single manufacturer, as the industry offers a wide range of choices. Instead, we carefully select the best products and technologies to suit your budget, ensuring your system is both efficient and reliable.

Custom Solutions

We conduct detailed design and feasibility studies for every client, ensuring each bespoke solution meets their specific needs and expectations.

Customer-Centric

At Spectrum, every client’s journey matters. We take a comprehensive approach, providing a seamless, end-to-end solution for all our installations.

Recent PV Installs

See how we’ve helped businesses and homeowners reduce their energy costs.

7.56kWp Solar PV & Battery System Installation

Project Overview Seeking greater energy self-sufficiency and lower electricity bills, the client approached Spectrum Energy Systems for a Solar PV and Battery Storage solution for their home in Worksop. After a detailed consultation and system design, they opted for a 7.56kWp solar PV system combined with a 9.5kWh GivEnergy battery,

39.5kWp Solar PV Installation in Sheffield

Project Overview Spectrum Energy Systems is proud to present this successful solar PV installation for a premium residential property in Sheffield. The client, was undertaking significant renovations and sought to integrate a high-performance solar energy system to support his home’s substantial electricity needs. Given the property’s high consumption—powered by an

Service areas

Based in Nottingham, we serve Nottinghamshire, Lincolnshire, Derbyshire and Leicestershire, with nationwide capability for multi-site portfolios.

Frequently asked questions

Are solar panels worth it in the UK?

Yes—solar PV can cut electricity bills, reduce exposure to price rises and lower carbon emissions. Actual savings depend on your roof, usage and tariff. We provide a tailored proposal with predicted generation (kWh/yr), savings and payback for your property. See real outcomes in our case studies and read our homeowner overview: The Complete Homeowners Guide to Solar Panels.

How many solar panels will I need?

We size systems from your annual consumption (kWh), roof area and budget. As a guide, many homes fit 3–6 kWp (around 8–16 modern panels), but the “right” size depends on your usage and export tariff. For a deeper explanation, see our Ultimate Guide to Installing Solar PV or speak to our team via Contact Us.

How much electricity will my system generate?

Generation is measured in kilowatt-hours (kWh) and varies by system size, orientation, shading and location. We model your predicted annual yield using industry methodology and include it in your proposal. For panel choices and performance tips, see Choosing the Right Solar Panel.

Do solar panels work in winter or on cloudy days?

Yes. PV produces electricity from daylight, not heat. Output is lower in winter due to shorter days and sun angle, but cool temperatures actually help panel efficiency. Our proposals show monthly generation so you know what to expect year-round. Explore battery options to shift winter daytime generation into the evening: Solar Battery Solutions for Homes.

Is a solar battery worth it?

A battery increases self-consumption (using more of what you generate) and can reduce peak-time imports. Value depends on your usage pattern, tariff and battery size. We’ll model payback both with and without storage so you can decide. See home batteries or larger systems for businesses.

Can I use my solar panels to charge an EV?

Yes—pairing PV with a smart charger lets you prioritise surplus solar for charging. Typical UK home chargers are ~7 kW AC; workplaces may use 11–22 kW AC and rapid DC for fleets. Learn more: Smart EV Charging at Home and EcoCharge Stations.

Do I need planning permission?

Most domestic and commercial rooftop systems fall under permitted development. Exceptions include listed buildings, conservation areas or certain flat-roof/ground-mount designs. We advise at survey stage and can assist with any applications. Read more in our homeowners guide or ask us via Contact Us.

What if my roof isn’t suitable?

We look at alternative arrays such as ground-mount, carports or different roof elevations. For businesses, see design ideas in Solar Solutions for Modern Constructions and Solar for Smart Industry. For homes, see Solar for Modern Constructions.

How long does installation take, and will it be disruptive?

Most homes install within 1–2 days; commercial projects vary with size and access. We handle scaffolding, electrical works and DNO notifications, and we keep your site tidy. See how we deliver on complex builds in our case studies and Expert Solar Fitting.

What warranties and guarantees are included?

Typical packages include module performance warranties (often 25 years), product warranties on modules and inverters, and an installation workmanship guarantee. We specify exact terms in your quote. Learn how we choose components in Expert Solar Installation Services and Renewable Power for Companies.

How do I get started?

Book a free survey and we’ll prepare a tailored proposal with design, predicted yield (kWh/yr), components, warranties and ROI. For background reading, see Resources for Homeowners and Resources for Businesses, or learn about our team on About Us.

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Customer Reviews

Fantastic experience from start to finish! The team at Spectrum provided clear, honest advice and helped me understand my solar options without any confusion. The installation was smooth, professional, and completed on time. The difference in my energy bills has been incredible! Their post-installation support was also excellent—checking in to ensure everything was working perfectly. Highly recommend their services to anyone considering solar energy!

Brilliant company to deal with. From the initial chat about my requirements to installation, I can’t fault one thing. I found Solar somewhat a minefield with some people trying to bamboozle me with information but Spectrum helped explain it in simple terms. The installation was faultless and they even called me 2 days later just to check everything was running OK. 10/10 team. Would definitely recommend.

Exceptional service and professionalism from Spectrum! The team guided me through the entire process, making everything easy to understand. The installation was seamless, and the quality of work was outstanding. I’ve already noticed a significant drop in my energy costs. Plus, their after-sales support has been fantastic—they genuinely care about their customers. I couldn’t be happier with my decision to go solar with Spectrum!