June 2022

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Solar Systems CAPITALISING ON THE SOLAR SURGE Millions of households across the UK could be paying around £700 a year more for electricity and gas following the price rises in April. With this in mind, the experts at Roof Giant assess what role rooftop solar PV has in the current energy crisis, as well as the potential opportunities for installers… Is solar a viable solution for households and businesses? Arecent report compiled by Solar Energy UK in partnership with the University of Cambridge analysed more than five million property transactions. The report suggests that solar power is a powerful way to lower running costs, increase property value and reduce the carbon footprint. Tried and trusted technology One of the significant benefits of solar is that it is one of the fastest renewable energy technologies to deploy. A domestic rooftop system can be designed and installed in days, and a large commercial rooftop system can be designed and installed in less than 12 months. In addition, it is easier to scale up an industry that is already in place than go from a standing start – an important factor due to the speed with which the UK needs to address the energy crisis. Costs: Initial cost outlay Figures show the cost of Rooftop solar has declined by as much as 60% since 2010. The average domestic solar PV system is 4.2kWp and costs around £6,500. Solar panels on top of the roof are the cheapest option, while solar tiles are the most expensive but can provide a better aesthetic. • Photovoltaic diverters are an add-on to a PV system. Diverters can increase the efficiency of a system by providing power to an immersion heater and/or an electric heater. A PV diverter switch installation could add around £800. • Adding batteries to the system can provide stored energy that can be used later. Battery technology has made leaps and bounds in recent years, and system costs range between £1,200 and £6,000. • Solar technology may have reduced in price, but installation remains a large part of the total cost. Homeowners can buy DIY kits, but there are obvious pitfalls for gaps in skills and knowledge. Not all systems are eligible for Feed-in Tariffs, and certification must be carried out by an accredited engineer. Making money back Under the Smart Export Guarantee (SEG), households can get paid for electricity that they do not use and export it back to the grid. Rooftop solar can save individual households well over £300 per year in energy costs while increasing property values at the same time. Homes with solar panels can increase in value by £1,800 or higher. The initial cost can typically be offset within 12- 18 years, with some studies calculating payback times as short as 8 -11 years. With the proper maintenance, solar panel installations should last between 20 to 25 years or more. Building Regulations The changes to the Part L Building Regulations in June 2022 will mean many new homes built in England will include solar, presenting a great opportunities for those roofers and installers who upskill and diversify their offering. Housebuilders will have to design and plan to meet the ‘Uplift to Energy Efficiency’ requirements in new homes from 1st June 2022. This is already in place in Scotland. The ‘Uplift to Energy Efficiency’ aims to deliver a 31% improvement on current Part L sustainability and energy efficiency standards. Solar panels aren’t the only option available, but they are acknowledged as an efficient way to comply with the new Part L Uplift and the forthcoming Future Homes Standard. What are the drawbacks? Is the property suitable? The ideal roof for solar panels is south-facing. East or west-facing roofs yield up to 20% less energy, and North-facing roofs are the least productive. For a 3.5kW system, room for 15 to 20 sq. metres of panels is required. The best results are achieved from a 30º roof. Solar panels are classed as permitted developments, so planning permission is not required in most cases. However, there may be restrictions for listed buildings or properties in a conservation area. Retrofitting: More and more households are investing in onsite solar to reduce their energy bills, and banks are starting to offer green mortgages to finance these home improvements. However, many people do not have access to such finance, so there is a role for the National Infrastructure Bank to provide finance for all green retrofitting. Summary Solar PV seems to be a viable option for many households in the UK and is a proven and durable technology. Of course, not all properties are suitable and can take full advantage of solar technology. However, PV systems are flexible and scalable in design and can integrate with other renewable technologies. The high initial investment has always been a barrier to solar installation. Organisations like Solar Energy UK are pushing the Government to introduce long-term funding support for residential retrofits and tax incentives for onsite energy generation, further opening up the market for those installers with the skills and accreditations to capitalize on the increased demand. Contact Roof Giant www.roofgiant.com 30 TC JUNE 2022
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June 2022

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