The panels are easy to install and do not require special licenses, making them a good alternative to roof panels.
Between 5% and 7% of American homes have solar panels on their roofs. Many others want to have them, but high costs, construction location and owner restrictions are the main obstacles.
But there are other options available in other parts of the world. Plug-in solar systems, also known as balcony solar systemsare alternatives to rooftop panels that still generate electricity from sunlight, but without complex and expensive installations.
Plug-in solar systems are designed to be used without the need for specialized technicians, building permits or permission from electricity companies. A typical system consists of small photovoltaic panels that can be placed on a balcony, yard, terrace or roof. They are connected to the home’s electrical system simply by plugging them into a common socket.
Popularity in Europe
In Europe, systems like this have been legal for more than a decade. They are extremely popular, especially among tenants who are not permitted to install permanent solar panels on their properties.
In Germany, the introduction of solar energy on balconies increased the percentage of homes with solar panels to about 10%.
Germans can buy plug-in solar kits at local retail stores and quickly install them at homewithout the help or supervision of technicians or energy companies. Estimates suggest that, at current electricity prices in Germany, the systems generate enough energy to pay for themselves in less than three years.
Legal changes underway in the USA
In the US, the main barrier to the widespread availability and adoption of plug-in solar systems is that Current laws and regulations do not differentiate between them of larger panel systems installed on roofs.
In most cases, solar panels on grid-connected buildings must be installed by professionals, as they often require additional equipment that prevent an excessive amount of energy generated in your home, go online. This process also requires a license from the state or local government.
For balcony solar systems, mains protection equipment is already integrated with what consumers buy in the store. But in most states, laws don’t recognize this difference and still require licenses and professional installation for any solar panel.
However, in 2025, Utah passed a law that eliminates these requirements for plug-in solar panel systems that generate less than 1200 watts of energy. Maine has enacted a similar law, and one in Colorado awaits the governor’s signature. Both are expected to take effect at different times in 2026. The Vermont Senate also passed a similar law, and the state General Assembly is considering the bill. Additionally, lawmakers in 25 other states are considering similar legislation.
Furthermore, in early 2026, UL Solutions, an independent security certification company, announced a new standard for plug-in solar systems in the US, which can help consumers feel more confident that they are purchasing a safe product for use in their homes.
Costs and benefits
The potential benefits of balcony solar systems vary primarily with the local cost of electricity. Purchasing these systems can cost between 1200 and 2000 dollarsbut they can generate enough energy to save hundreds of dollars on electricity bills annually.
They can’t supply an entire house, but they can power relatively low loadssuch as refrigerators, LED lamps, laptops, cell phone chargers, televisions and fans, even during power outages.
Depending on the configuration, porch solar systems can offer additional benefits. Mounting them on mobile bases that follow the sun’s movement across the sky can increase energy generation. Installing panels on eaves can create shade, reducing the need for air conditioning, especially in hot climates.
Adding battery energy storage to balcony solar systems can also help homes store excess energy generated during the day and use it at night, further reducing electricity billsalthough purchasing batteries increases costs.
Demand for solar systems on balconies in the US will be significant, especially in places with lots of sunlight and high electricity prices. Homeowners will still have to select their equipment and location carefully to maximize energy generation and cost savings.
