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by Sean Hill on Mar 18, 2023
Over the years, I have come to appreciate the significant potential of solar electricity panels, also known as photovoltaics (PV), as a renewable energy solution for homeowners.
Chapter 1: Understanding Solar Panels and How They Work
Solar panels consist of many cells made from layers of semi-conducting material, most commonly silicon. When light shines on this material, a flow of electricity is created. Solar PV systems are made up of several panels, with each panel generating around 355W of energy in strong sunlight. The electricity generated is direct current (DC), which is converted to alternating current (AC) by an inverter for use in household appliances or exported to the grid.
Chapter 2: Key Considerations Before Installing Solar Panels
Space is a key consideration for the installation of solar panels. The average system size is around 3.5kWp and this typically requires around 20m2 roof area. An unshaded, South-facing roof is ideal for maximum electrical output. East or West facing roofs can still be considered, although they yield around 15-20% less energy. North-facing roofs are not recommended. It’s essential to assess shading on the roof as nearby buildings, trees, or chimneys could have a negative impact on the performance of the solar PV system.
Chapter 3: Solar Panel Registration and Permissions
Solar PV panels are generally considered ‘permitted developments’ and often don’t require planning permission. However, exceptions apply, and it’s best to check with the local planning office or architect studio for guidance. Registration with the Distribution Network Operator (DNO) is also required. In most cases, the installer will handle the registration process.
Chapter 4: Potential Benefits of Solar Electricity
Solar panels offer various benefits to homeowners. Sunlight is free, and once the initial installation costs are covered, electricity costs are significantly reduced. Solar electricity is also low carbon, renewable energy, which can help reduce the carbon footprint. A typical home solar PV system could save around one tonne of carbon per year, depending on the location.
Chapter 5: Making the Most of Solar Energy
To maximize the benefits of a solar PV system, it’s essential to be mindful of electricity consumption. Reducing electricity use can lower bills and carbon footprint. It’s a good idea to run electrical appliances during daylight hours when the solar PV system is at its peak. Furthermore, solar PV systems can be combined with other renewable technologies such as heat pumps or solar hot water systems for even greater benefits.
Chapter 6: Using PV Diverter Switches
PV diverter switches are a useful tool for increasing the consumption of solar electricity generated by a solar PV system. These switches can divert surplus electricity to power the immersion heater in the hot water tank, storing hot water for later use. While excess solar energy may not meet all hot water needs, it can help reduce bills.
Chapter 7: Costs and Potential Savings
The average domestic solar PV system costs around £7,000, and costs vary depending on factors such as array size, roof access, and panel choice. The amount of savings that homeowners can achieve by using the electricity generated varies based on factors such as working from home, the number of people at home during the day, and whether cooking is done using electricity.
Chapter 8: Export Payments and Incentives
For surplus electricity exported to the grid, homeowners can receive export payments. After the closure of the Feed-in Tariff scheme, the Smart Export Guarantee (SEG) was introduced to provide financial support to small-scale renewable energy generators. The savings from solar PV with the SEG are considerably higher than without it.
Chapter 9: Maintenance and Longevity of Solar PV Systems
Solar PV systems require little maintenance, but some attention is needed. Monitoring nearby trees to prevent overshadowing and occasional cleaning may be necessary. The panels typically last 25 years or more, but the inverter may need replacement during this period. Monitoring system performance and weather conditions is essential for understanding system health.
Chapter 10: Investing in Solar Energy for a Sustainable Future
Solar energy is a key component of a sustainable future. With minimal maintenance, solar panels provide long-lasting benefits that reduce electricity bills and carbon footprint. Incorporating solar PV systems into architectural designs can create energy-efficient homes that contribute to a more sustainable future.
Conclusion
We highly recommend considering solar energy as part of a holistic approach to sustainable and energy-efficient design. By incorporating solar PV systems into your architectural projects, you contribute to a more sustainable future and provide homeowners with the tools to reduce their carbon footprint and electricity costs.
If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3949 8471
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