How to check if your home is safe and compatible with plug-in solar panels

As plug-in solar panels officially become legal in the UK, thousands of renters and homeowners are looking to tap into affordable home-generated electricity.

However, safety experts are urging consumers to check their home setups before buying, warning that not every property is immediately ready for the technology.

Plug-in solar systems generate electricity that flows back into a property’s internal wiring. While modern homes can often handle this safely, leading electrical safety charity Electrical Safety First has raised concerns that reverse electricity flows could damage older types of protective devices in consumer units, known as Residual Current Devices (RCDs).

RCDs are critical safety switches designed to cut power instantly in the event of an electric shock, such as drilling into a wire or hitting a cable during gardening. If an older RCD becomes damaged or “blinded” by reverse currents, it may fail to operate when needed.

To help households navigate the new rules safely, safety experts recommend following five essential steps to check compatibility before making a purchase:

• Verify your RCD type: Not every home is currently suitable. Homes equipped with older Type AC RCDs should avoid plug-in solar systems until upgrading to at least a Type A bidirectional RCD on those specific circuits.

• Get your electrics assessed: Never assume “plug-in” means universal compatibility. Consumers – particularly those in older properties or with unknown electrical histories – should have a competent electrician registered with a competent person scheme inspect their installation first.

• Avoid extension leads and adapters: Plug-in solar systems must be plugged directly into a wall socket. Never use extension leads, cable reels, multiway adapters, travel adapters, or plug-in RCD adapters, as these accessories can easily overheat and create serious fire hazards.

• Buy strictly from reputable high street retailers: Avoid third-party sellers on online marketplaces. Because online platforms are not always legally responsible for goods sold via third parties, shoppers risk purchasing sub-standard kits that fail to meet official UK product specifications.

• Stick to a strict “one home, one device” rule: Only a single plug-in solar panel system is permitted per household. Installing multiple units can overload circuits and diminish the effectiveness of home safety protections.

Luke Osborne, Technical Director at Electrical Safety First, emphasises the importance of caution: “We urge households to ensure they have an RCD suitable for this technology and to consult a competent electrician if they are unsure if they have the right protections in place in their home.”

https://www.electricalsafetyfirst.org.uk/safety-advice/products-and-appliances/green-energy/plug-in-solar-panels/