Solar Panels FAQs
Frequently Asked Questions About Solar Panels
Solar panels are becoming an increasingly common feature on UK homes and commercial buildings, but there are still plenty of questions about costs, performance, batteries, planning and installation.
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Below we answer some of the questions homeowners, landlords and businesses most frequently ask about solar energy.
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1. Are Solar Panels Worth It in the UK?
For many UK properties, yes. Solar panels can reduce the amount of electricity you need to buy from the grid and can provide useful long-term protection against rising energy costs. The financial benefit depends on the property, roof orientation, electricity consumption, system size and whether battery storage is included.
2. How Many Solar Panels Do I Need for My Home?
There is no single number that suits every home. The right system will depend on your annual electricity consumption, available roof space, roof orientation and the output of the individual panels being installed. A solar installer can assess your property and recommend an appropriately sized system.
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3. How Much Electricity Do Solar Panels Generate?
Solar generation depends on the size of the system, panel efficiency, location, orientation, roof pitch and shading. Generation will naturally be higher during longer, brighter summer days, but a correctly designed system can produce electricity throughout the year.
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4. How Long Do Solar Panels Last?
Modern solar panels are designed for long-term use and commonly remain operational for several decades. Their output generally reduces gradually over time rather than the panels suddenly stopping working. Inverters and batteries may require replacement sooner than the panels themselves.
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5. Do Solar Panels Work in Winter and on Cloudy Days?
Yes. Solar PV panels generate electricity from daylight rather than heat or direct sunshine alone. Output is lower during darker winter months and heavily overcast conditions, but panels continue generating whenever sufficient daylight is available.
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6. Solar Panels With Battery Storage – Is It Worth It?
Battery storage allows electricity generated during the day to be saved for use later, including during the evening when household demand is often higher. Whether a battery makes financial sense depends on electricity consumption, solar generation, tariffs, battery cost and the way energy is used within the property.
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7. How Long Does It Take for Solar Panels to Pay for Themselves?
Payback periods vary considerably. Installation cost, system size, electricity prices, energy consumption, self-consumption and battery storage can all affect the calculation. Solar should therefore be considered as a long-term energy investment rather than judged solely on a single headline payback figure.
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8. Do You Need Planning Permission for Solar Panels?
Many domestic solar installations can be completed without a conventional planning application, although restrictions can apply. Listed buildings, conservation areas, unusual installations and certain commercial projects can require additional consideration. The planning position should always be checked before installation where there is any doubt.
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9. Can You Install Solar Panels on Any Roof?
Most common roof types can accommodate solar panels, but not every roof is equally suitable. Roof condition, structural capacity, orientation, pitch, shading, available space and the roofing material should all be assessed before installation.
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10. Can Solar Panels Be Installed on New Builds and Home Extensions?
Yes. In fact, incorporating solar at the design or construction stage can make installation easier because roof layout, orientation, electrical infrastructure and plant locations can all be considered from the outset. Solar can be incorporated into new homes, extensions and major refurbishment projects.
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11. Are Solar Panels Suitable for Landlords and Rental Properties?
Yes. Solar can reduce the overall energy demand of a rental property and may make it more attractive to energy-conscious tenants. Landlords should consider who benefits from the generated electricity, how energy is metered and whether battery storage forms part of the installation.
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12. Are Solar Panels Suitable for Schools and Colleges?
Schools and colleges can be particularly well suited to solar because they often have substantial roof areas and consume significant amounts of electricity during daylight hours. Solar can also form part of a wider programme to reduce energy costs and improve environmental performance.
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13. Are Solar Panels Suitable for Farms and Agricultural Buildings?
Agricultural buildings frequently provide large roof areas that can accommodate substantial solar installations. Farms may also have significant daytime electricity requirements for machinery, refrigeration, ventilation and other equipment, making on-site generation particularly useful.
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14. Are Solar Panels Suitable for Warehouses and Industrial Buildings?
Yes. Large commercial and industrial roofs can provide excellent opportunities for solar generation. Businesses that use large amounts of electricity during working hours can often consume a substantial proportion of the power generated directly on site.
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15. Are Commercial Solar Panels Worth the Investment?
Commercial solar can reduce electricity purchased from the grid and provide greater certainty over future energy costs. The business case depends on installation cost, available roof or land area, electricity consumption, operating hours, finance and the proportion of generated electricity used on site.
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16. Do Solar Panels Need Maintenance and Servicing?
Solar PV systems generally require relatively little maintenance, but periodic checks are sensible. Panels should be inspected for damage or excessive dirt, while inverters, cabling, isolators, mounting systems and monitoring equipment should be checked as appropriate.
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17. What Does a Solar Panel Inverter Do?
Solar panels produce direct-current electricity, while most homes and businesses use alternating current. The inverter converts the electricity produced by the panels into electricity that can be used within the property. Modern inverters may also provide monitoring and battery-management functions.
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18. What Is Solar Battery Storage?
A solar battery stores electricity produced by your solar panels that is not immediately being used. Instead of exporting all surplus generation straight away, some of it can be stored and used later when the panels are producing less electricity.
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19. What Is the Difference Between Solar Thermal and Solar PV?
Solar PV panels generate electricity from daylight. Solar thermal systems use solar energy primarily to help produce hot water. They are different technologies and should be selected according to what the property owner is trying to achieve.
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20. What Happens to Excess Solar Electricity?
When solar panels produce more electricity than the property is using, the surplus can either be stored in a compatible battery or exported to the electricity grid. How much energy is used, stored or exported depends on the system design and the property's electricity demand.
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Still Have Questions About Solar?
Every property is different, and the best solar system will depend on your roof, electricity consumption, budget and plans for the property.
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APN Solar can help you explore your options and connect you with suitable solar installers serving your area.
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