Plug-in solar panels became legal to buy and use across Great Britain on 27 August, opening up a new route into solar for households looking to reduce their energy bills through clean, homegrown power.
With plenty of discussion around the technology, Installer spoke to DESNZ to break down some key questions installers may already be hearing from customers:
Myth: Plug-in solar is just a gimmick
Not according to the government’s figures.
Each compliant plug-in solar kit produces up to 800W of power and can provide up to 20% of an average home’s electricity use. A typical household could save between £70 and £110 a year on energy bills from a plug-in solar kit.
What actually changed on 27 August?
From 27 August, households across Great Britain became able to buy and use plug-in solar panels legally.
The changes followed rigorous, independent safety testing covering all key electrical elements, which showed that compliant panels are safe and compatible with UK domestic wiring.
How does it actually work?
It can help power appliances such as lights, electrical devices and appliances using electricity generated from sunlight. If you use more electricity than the panels generate, electricity automatically comes from the grid as normal. If it generates more than you use, excess electricity is automatically exported to the grid.
Myth: Plug-in solar replaces rooftop solar
No.
The government’s position is that plug-in solar provides an alternative for households that may not have the option of rooftop solar. It does not replace conventional rooftop systems, but it does create another route for consumers to generate their own clean electricity and reduce their energy bills.
Myth: Plug-in solar isn’t safe
This has been one of the biggest debates around the rollout.
The government’s line is clear: compliant panels are safe and compatible with UK domestic wiring following rigorous, independent safety testing. The UK product specification is also more stringent than that used in Germany, where the technology is already widely used.
Can customers install one without checking permissions?
Not necessarily.
The Energy Saving Trust consumer guidance states that before purchasing or installing plug-in solar devices, people should check whether permissions are required for their property. This may include from a landlord, building owner or freeholder, planning permission or listed building consent.
That’s likely to be an important part of installer conversations, particularly where customers are unsure about the requirements attached to their property.
Is the wider solar market still growing?
Yes.
Recent Microgeneration Certification Scheme figures showed almost 150,000 certified solar installations in the first six months of 2026, up 17% on the previous highest start to a year. Battery installations also increased significantly over the same period.
What does this mean for installers?
The technology provides an alternative for households that may not have the option of rooftop solar, while the wider solar sector continues to see strong growth. As customers begin to explore the technology, installers are likely to play an important role in helping consumers understand how plug-in solar works and the permissions that may be required.
*Photo credit – Maximilian Steyger/DESNZ
