Plug-in solar panels, a more compact and affordable alternative to traditional rooftop systems, will soon be available for purchase in the UK, with new regulations permitting their sale from August 27. Retailers such as B&Q and Lidl are reportedly preparing to stock the devices, which are expected to cost between £400 and £600 per panel.
According to government estimates, a well-positioned 800W plug-in solar panel could save households approximately £110 per year on energy bills. Savings for west- or east-facing installations are estimated at around £70 annually. However, experts caution that not all homes are suitable for these panels, and incorrect installation could lead to financial losses.
Installation Considerations
Homeowners are advised to assess the potential for sunshine at their property. A south-facing orientation is ideal, while north-facing gardens may struggle to generate enough electricity to recoup the system's cost. Utilizing a smartphone compass app and online tools like SunCalc can help determine the best placement and assess sunlight exposure throughout the year. Potential shading from trees or buildings should also be considered, as it can significantly reduce energy generation.
Plug-in solar panels can be mounted on various surfaces, including walls, fences, and balconies, making them a potential option for apartment dwellers. If mounting on a shared fence, obtaining permission from the neighbor is crucial to avoid potential damage and repair costs. Renters should review their lease agreements and seek landlord approval before installation, as unauthorized alterations could lead to deductions from tenancy deposits.
Fire safety regulations prohibit installation on timber balconies or cladding, as doing so could invalidate home insurance. Consumers are urged to check their balcony materials and consult with their insurer, landlord, or freeholder if unsure.
Electrical Safety and Usage
Introducing a new electricity source into the home necessitates attention to electrical safety. Older homes with outdated wiring may pose additional risks. The Institution of Engineering and Technology recommends a professional electrical inspection, such as an Electrical Installation Condition Report, before installing plug-in solar panels. This report, typically costing between £100 and £250, can identify potential hazards and ensure the home's electrical system is compatible.
Currently, the new regulations cover solar systems without batteries. Consumers should not assume they can connect separate battery storage units, as this could compromise the system's safety and potentially void insurance. The focus should be on utilizing generated electricity as it is produced.
Optimizing Savings
While plug-in solar panels can contribute to energy savings, their output is less than traditional rooftop systems. In some cases, switching to an off-peak energy tariff, such as Economy 7, might offer greater financial benefits. For example, a washing machine cycle might cost less when run overnight on a cheaper tariff than when partially powered by solar during the day, especially given the unpredictability of British weather.
Maximizing savings from plug-in solar panels depends on daytime electricity usage. Individuals who are home during daylight hours, such as remote workers or retirees, are likely to benefit most. Commuters who are away from home for extended periods during the day may find the payback period for the system is longer.
Registration and Network Operators
Once installed, owners must notify their local Distribution Network Operator (DNO) within 28 days of connecting the panels. The Energy Networks Association website can help identify the correct DNO. The government is expected to launch a central registration website for plug-in solar installations when they become available.