Is Plug-In Solar Worth the Risk? A Comprehensive Guide to Its Benefits and Drawbacks

The global growth of solar energy generation is remarkable. In just 15 years, the costs associated with solar power installations have plummeted by 90%, now comprising over 90% of the costs for setting up solar systems.
This surge now represents around 80% of the world’s new power capacity each year.
As oil and gas prices surged due to conflicts in the Middle East, solar power emerged as a logical alternative for numerous countries.

In the UK, instead of sticking to the old methods, the government plans to legalize a previously banned form of solar energy generation.
“This will be available within months.”
Through local shops and supermarkets.

These plug-in solar systems are user-friendly: bring the panel home, place it in a sunny location, and simply plug it in. There’s no installation cost and you can immediately start generating solar energy for your home. If you relocate, just take the panels with you, making solar energy increasingly affordable and accessible.

Many nations have already adopted plug-in solar technology with high expectations for its global impact. However, critical questions remain: Will it actually reduce energy costs? How affordable is it? Is it safe?

Despite declining costs, traditional solar installation remains costly. For example, average estimates for UK homes indicate:
A 4-kilowatt solar system capable of meeting most energy needs costs around £7,000.
In the U.S., average households use approximately double that amount of energy.
Installing a sufficient solar power system costs about $20,000.
These prices include professional installation and necessary changes to your electrical system. This may lead to reduced energy bills and even potential profits by selling back excess energy to the grid.

Plug-in solar is a more straightforward solution. With smaller kits, you can acquire an 800-watt system for roughly £400, which could supply about 20% of the average UK household’s energy needs. Installation is quick and easy—you attach the panels to a balcony railing or garage roof and plug it into an outlet to start generating energy.

While excess energy returns to the grid, without professional installation, you won’t earn from it. As noted by Mark Golding, a British solar panel installer at Spirit Energy, “essentially that energy just benefits the neighbor.”

Plug-in solar technology has already made inroads outside the UK, with over 1 million systems installed in countries like
Germany
, where as of July last year, it had a total capacity of 1.6 to 2.4 gigawatts—enough to boil 500,000 kettles all at once.

Germany is currently the only country effectively tracking plug-in solar systems, making statistical information scarce. However, estimates suggest up to
5 million kits are in use across Europe
. Though small in the overall energy mix, these systems can lower individual energy bills and cumulatively boost renewable energy output countrywide.

Jan Rosenau
, a researcher from Oxford University, believes adoption rates could increase if governments continue to allow personal installations. He asserts, “Though each system is small, their collective impact on distributed generation and public involvement in the energy transition is significant.”

Currently, many plug-in panels remain illegal in the U.S., but Utah has become the first state to legalize their use. Numerous other states are following suit.
A similar bill is underway.
According to Cola Stryker from BrightSaver, a U.S. solar non-profit, individuals outside Utah face excessive bureaucratic hurdles to install a few panels compared to those developing large-scale solar farms, marking a dubious situation.

Stryker anticipates that plug-in solar could alleviate financial stress, contribute to climate change mitigation, and pave the way for significantly wider adoption of renewable electricity across the U.S. “This could mark a critical turning point, allowing the benefits of renewable energy costs to be accessible to consumers,” she predicts. BrightSaver estimates that by 2035, 24 million U.S. households could utilize plug-in solar solutions.

Is Plug-in Solar Safe?

Despite its widespread use, safety experts express concerns over plug-in solar kits.
Mark Coles
from the Institute of Engineering and Technology (IET) suggests that consumers check their home’s wiring before purchasing a system. Moreover, several areas of concern have been noted.

One issue is the potential ineffectiveness of residual current devices (RCDs). RCDs, which help prevent electric shocks and short circuits, may not be equipped for split current flows. In the U.S., there are similar concerns. Germany’s rapid advancements were aided by the standardization of two-way RCDs in the 1980s.

Another concern raised by the IET is related to systems that operate multiple kits during a power outage. Plug-in setups should ideally shut down; however, if they continue generating energy, this may confuse devices into thinking that grid power is still available, posing risks for electrical workers during repairs due to potential electrocution.

“This places maintenance personnel at risk,” Coles comments. “This contradicts the ‘just buy and plug in’ idea, but the reality is that public safety risks are present.”

While Coles acknowledges the advantages of plug-in solar, he emphasizes the necessity for manufacturers to demonstrate the safety of their products in unusual circumstances.

New Scientist
reported that the Department for Energy Security and Net Zero maintains that their testing shows plug-in solar systems can be safely used with domestic circuits within the UK. All products must align with UK product safety regulations, and an independent review is underway to determine further guidelines before sales commence.

Stryker asserts that the greatest risk lies in the decision to do nothing amid the escalating effects of climate change and rising energy costs affecting many households. She believes public adoption of this technology will occur regardless of formal approval, stressing that the priority should be ensuring public safety. “Solar energy is the most affordable energy available globally, and it’s the cheapest energy ever produced by humanity,” she concludes.