Solar PV
Overview
Solar panels are made up of photovoltaic (PV) cells that convert sunlight directly into electricity. This process, known as the photovoltaic effect, allows solar energy to be transformed into usable electrical power without the need for moving parts or fuel. PV systems generate electricity only when exposed to daylight — they do not produce power from heat alone, making sunlight an essential requirement.
The concept of generating electricity from sunlight is not new. The photovoltaic effect was first discovered in 1839 by Henri Becquerel and this foundational principle remains at the core of all modern solar technology. While the science is over a century old, advances in materials and system design have made solar PV one of the most efficient and reliable renewable energy solutions available today.
There are several types of solar panels available, each suited to different applications and environments. When selecting a solar PV system, it’s important to consider factors such as installation location, available roof or ground space, energy demand, whether the system is for residential or commercial use and overall budget.
At Greenio, our specialists assess your specific requirements and guide you through the selection process, ensuring the most suitable solar PV solution is chosen for your property. We also support you in understanding system performance and how to maximise the long-term benefits of your investment.
How Do Solar Panels Work?
Step 1 – Energy generation
Solar panels absorb energy from daylight and convert it into direct current (DC) electricity using photovoltaic cells.
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Step 2 – Power conversion
The DC electricity is passed through an inverter, which converts it into alternating current (AC) electricity — the type of power used by homes, businesses and most electrical equipment.
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Step 3 – On-site usage
The converted electricity is distributed throughout your home or commercial property, supplying power to lighting, appliances, machinery and other electrical systems.
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Step 4 – Storage or export
Any surplus electricity generated can either be:
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Stored in a battery system for later use, or
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Exported back to the national grid, reducing reliance on imported energy and improving overall system efficiency.
What is a solar battery and should I get one?
Solar PV systems often generate more electricity than can be used on site at any one time, particularly during daylight hours. Without storage, this surplus energy is exported back to the electricity grid, meaning much of the power you generate is not fully utilised on site. By integrating a solar battery into your solar PV system, you can capture and use more of the energy you produce, maximising savings and improving overall system efficiency.
A solar battery stores excess electricity generated by your solar panels for later use. This stored energy can then be used when generation is low or unavailable — such as in the evening, during periods of reduced sunlight, or during peak demand. For businesses, battery storage can also help manage load profiles, reduce peak electricity costs and improve resilience.
The primary purpose of battery storage is to maximise on-site consumption of renewable energy. Without a battery, surplus electricity is exported to the grid, often at a lower value than the cost of importing electricity later. By storing and using your own generated power, homes and businesses can reduce reliance on the grid, improve energy independence and achieve greater financial and carbon savings from their solar PV investment.
Battery & Inverter Installed by Greenio in 2022
Benefits of Getting Solar PV
Combat rising energy prices
By generating your own electricity through solar panels, you can significantly reduce your reliance on the national grid and lower your annual energy costs. If your system produces more electricity than you use on site, surplus energy can be exported back to the grid through the Smart Export Guarantee (SEG), providing an additional financial return.
Lower your carbon footprint
Solar power is a clean, renewable energy source that helps homes and businesses reduce their carbon emissions. By generating electricity sustainably, you directly support the UK’s carbon reduction targets and contribute to the wider fight against climate change, helping to protect ecosystems, communities and future generations.
A renewable and sustainable energy source
Unlike fossil fuels, solar energy is renewable and abundant. Using solar power also helps reduce air pollution, one of the major environmental challenges worldwide, improving air quality and supporting healthier living and working environments.
Quick and efficient installation
Solar PV systems can typically be installed quickly, often within a day for residential properties and within short timeframes for commercial sites. System performance is influenced by factors such as roof orientation and pitch and Greenio designs each installation to optimise output and suit your specific property and energy usage.
A smart long-term investment
Solar PV systems deliver long-term savings by reducing electricity bills year after year. Over time, many systems pay for themselves through reduced energy costs, making solar a financially sound investment for both homeowners and businesses looking to protect against future energy price rises.
FAQs
Do solar panels still work on cloudy days?
Yes, absolutely. Solar PV panels generate electricity from daylight, not heat or temperature alone. Even on cloudy days, panels can still produce electricity, although output will naturally be lower than in full sunshine.
In fact, while panels in very hot climates can generate more energy overall, excessive heat can reduce efficiency. Solar PV systems perform reliably in the UK climate and do not require constant direct sunlight to operate effectively.
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Can you really charge an electric car using solar energy?
Yes. If you own, or are considering, an electric vehicle, solar PV can be used to charge it, significantly reducing fuel costs and carbon emissions.
To power both your home or business and an electric vehicle, a larger solar PV system is usually required. If EV charging is part of your plans, it’s important to highlight this during your enquiry so the system can be designed accordingly.
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How long does installation take?
Installation times vary depending on system size and complexity:
A typical 10-panel residential system usually takes 1–3 days
A commercial installation of 30–50 panels typically takes 10–12 days
Larger or more complex commercial projects may take longer. Greenio will always provide a clear installation programme tailored to your specific project.
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Do I need planning permission?
In most cases, installing solar panels does not require planning permission, as they are classed as permitted development. However, there are exceptions.
You may need to consult your local planning authority if:
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Your property is listed
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It is located in a conservation area
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It is within an Area of Outstanding Natural Beauty (AONB)
If panels are installed on a roof that is not visible from the road, planning permission is typically not required. If permission is needed, Greenio can support and guide you through the application process as part of our service.
Can I go completely off-grid?
While it is technically possible to go fully off-grid, this is not generally recommended as a practical solution. Off-grid systems require significant investment in battery storage and backup generation, and there is a risk of power shortages during prolonged periods of low generation.
For most homes and businesses, remaining grid-connected with solar and battery storage provides the best balance of reliability, resilience and cost-effectiveness.
Can I add a battery to my existing solar PV system?
Yes. Solar PV systems often generate more electricity than is used on site, and adding a battery allows surplus energy to be stored for later use.
Greenio assesses each system individually and will advise whether a battery would provide genuine benefits. Stored energy can then be used in the evening or at times when solar generation is low.
How do I know what size battery I need?
Not every property needs a battery, and correct sizing is essential. Greenio will advise whether battery storage is appropriate and specify the right solution based on your usage. Key considerations include:
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Power rating – how much electricity you want to use at one time
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Usable capacity – how long you want the battery to supply power
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Round-trip efficiency – how much stored energy can be effectively reused
Our approach ensures you get maximum value from your solar PV system without unnecessary cost.
Can Greenio put solar PV on my camper van or motorhome?
Yes. Solar panels are an excellent solution for camper vans and motorhomes, providing power for lighting, appliances and entertainment systems such as TVs, radios and charging devices.
If you’re interested in mobile solar installations, contact us for a free, no-obligation quote.
Why Greenio?
Proven Expertise
Greenio’s knowledgeable and approachable specialists are on hand to guide homeowners and businesses through every stage of their renewable energy journey. We take the time to understand your requirements and recommend the most suitable Solar PV and low-carbon solutions to meet your energy, budget and long-term objectives.
Qualified, Experienced Engineers
All Greenio engineers are fully qualified and bring extensive experience across residential and commercial installations. As a forward-thinking and professional organisation, we maintain high standards by ensuring only skilled, accredited electricians and engineers are part of our delivery team.
A Complete One-Stop Solution
Greenio provides a fully managed, end-to-end service. From initial consultation and quotation through to installation, commissioning and handover, we manage the entire process — giving you a single point of contact for updates, support and peace of mind.
Customer Service You Can Rely On
Exceptional customer service is at the heart of what we do. Our approach is reflected in over 70 five-star Google reviews, highlighting our commitment to quality, reliability and customer satisfaction across both domestic and commercial projects.
Quality Assurance & Warranties
All equipment installed by Greenio is covered by full manufacturer warranties. In addition, every Solar PV installation includes a 24-month workmanship guarantee, providing added confidence in the quality and longevity of our installations.
Interested in a free quote?
Fill in our Solar PV Enquiry Form or Call us on 0800 810 0565
