With electricity prices up nearly 30% since 2010 across the United States, governors and state policymakers are under growing pressure to help households manage rising energy costs. Many are now turning to an emerging technology gaining traction in Europe: plug-in solar, also known as balcony solar.
Plug-in solar systems are small, portable systems that generate electricity and connect directly to a standard household outlet — no installation, no contractor, no roof required. Estimates suggest they could save U.S. consumers billions of dollars a year in electricity costs, while potentially offsetting thousands of megawatts of demand. At least 24 states are considering legislation to remove red tape and bring this technology to U.S. markets in 2026, aiming to reduce bills and expand equitable access to solar.
Rather than replacing rooftop solar, plug-in solar serves a different market. For the roughly one‑third of U.S. households who rent or for those living in apartments, rooftop systems have largely been out of reach, making plug‑in solar a practical, affordable and viable option for households that have been locked out of the clean energy transition.
Europe demonstrates the potential. In Germany, where supportive policies have been in place for several years, at least 1 million homes already use plug‑in solar systems. The technology’s rapid growth has lowered consumer electricity costs, expanded residential access to solar and contributed measurable progress toward national renewable energy goals.
Replicating that success in the U.S. will require overcoming a significant regulatory mismatch: utility regulations created for large rooftop installations are often applied to small plug-in devices, even though the two technologies are designed and used in different ways. We examine that mismatch and what clear, consistent guidance for both households and utilities could mean for expanding access to affordable residential solar across the country.
How Plug-In Solar Differs from Traditional Rooftop Systems
Traditional rooftop solar systems are permanently installed, hard-wired into a home’s electrical panel, and sized to generate a substantial share of household electricity needs. Because they can export excess power to the grid, they require a full interconnection process, including utility approval, grid connection, and permission to operate.
Plug-in systems work differently. Consisting of just two or three panels, they pair standard solar panels with a microinverter, allowing them to be placed on a balcony, patio or backyard and plugged into a household outlet just like an appliance – supplying electricity for use within the home instead of drawing power from the grid. In Europe, households routinely buy plug‑in kits off the shelf from retailers like IKEA for about $590 and begin using them immediately — no electrician, permits, or interconnection applications required.
Plug‑in systems are much smaller than conventional arrays, typically capped at about 800 watts in Europe, compared to an average U.S. rooftop system of 7.2 kilowatts, yet powerful enough to run a large refrigerator or small air conditioner. They can also be connected to a battery, or include an integrated battery, expanding their use beyond daylight hours. And because the units are portable, households can take them when they move.
In the U.S., system costs currently range from $500 to $2,000, with typical annual savings of $200 to $400 on electricity bills and a payback period of about five years. While plug-in systems cannot offer the same savings potential as a full rooftop array, it offers a meaningful and accessible entry point, particularly for households that have had few options until now.
Plug‑in solar in the U.S. could also help address long-standing inequities in the residential solar market. Rooftop systems have disproportionately benefited higher‑income homeowners with access to capital, credit, and homeownership. Lower‑income households and households of color are more likely to rent and therefore face structural barriers to adoption. For example, 58% of African American-led households and 52% of Hispanic-led households rent, compared to 27.9% of non-Hispanic whites.
For households, plug‑in solar offers something rooftop systems largely cannot: a low‑cost, accessible entry point into clean energy. The savings these systems provide will not solve all energy affordability challenges, but they can reduce utility bills, support more equitable solar adoption and deliver meaningful relief to the households that face the greatest barriers to participating in the clean energy transition – while helping states advance their broader clean energy goals.
Red Tape Currently Limits Plug-In Solar in the U.S.
In much of the U.S., many utilities do not yet distinguish between small, zero-export plug-in devices and larger grid-connected systems. As a result, households may be required to navigate interconnection applications, permits, electrician sign‑offs, and delays, even for low‑power, plug‑and‑play units.
Interconnection requirements for rooftop solar were originally developed for safety reasons. When rooftop systems export excess electricity back to the grid, utility oversight helps prevent hazards such as overloading circuits or even electrocuting utility workers repairing lines when power is restored after an outage. This oversight comes with significant costs, with rooftop installations requiring up to several months and thousands of dollars in installation and permitting fees.
Plug-in solar systems are, by design, built to address many of the safety concerns that interconnection rules were created to manage. They operate on a much smaller scale and are typically designed as zero-export, meaning they provide on-site power without sending electricity back to the grid. They include built-in protections such as anti-islanding, which automatically shuts the device off if grid power is lost. And because they meet recognized testing standards, these systems are treated similarly to household appliances under U.S. electrical safety codes.
When simple plug-in solutions are treated like full-scale installations, the additional steps can outweigh potential savings and introduce regulatory uncertainty. For many households, these hurdles undermine the very purpose of plug‑in solar: a low-cost, low-friction way to participate in the clean energy transition.
How States Can Enable Plug-In Solar
Utah stands out as the clearest example of what enabling legislation looks like in practice. In March 2025, it became the first state to fully legalize and streamline plug‑in solar through House Bill 340, unanimously passed by the legislature and signed into law by Governor Spencer Cox. The law created a clear category for portable solar generation devices of up to 1,200 watts and removed burdensome interconnection, utility approval, and permitting requirements.
This breakthrough has sparked national momentum: by early 2026, legislators in at least 23 other states, including California and New York, had introduced similar bills to authorize plug‑in solar devices. If passed, homeowners and renters could install plug-in panels without utility approval.
These bills share a policy framework built around three common elements. First, defining plug-in solar as a distinct regulatory category with clear size limits. Second, streamlining registration by replacing complex interconnection requirements with either a simple notification process or no formal registration at all. Third, requiring safety standardization by ensuring plug-in solar devices to be designed for home use and complying with safety standards, like the National Electrical Code and Underwriters Laboratories.
In many European countries, renters are guaranteed the right to install plug-in solar systems, expanding access to affordable clean energy and preventing discrimination by landlords. With roughly one-third of U.S. households renting, establishing clear solar access rights would significantly broaden who can benefit from these low-cost technologies and help address equity issues in clean energy access.
Legislation Is Necessary. But Not Enough for Equitable Adoption
Enabling state legislation for plug-in solar is the first step. After that, policymakers at all levels can take additional action to support widespread and equitable adoption.
Many households may not be familiar with plug-in solar, how it works and whether it is safe and legal in their jurisdiction. Policymakers can address this by providing clear, accessible information to help consumers understand and trust the technology. State and local governments can promote outreach campaigns and partner with community groups and local businesses to host demonstration events that showcase the technology in action.
Even though plug-in systems cost far less than rooftop solar, any upfront expense may still be out of reach for some low-income households. To address this, states and cities can create dedicated financial incentives or rebates for plug-in solar, just as they do for energy-efficient appliances. They can also integrate plug-in solar into existing income-qualified energy efficiency, home retrofit and residential solar programs. Some cities have pioneered income-qualified ebike-incentive programs that offer higher subsidies to lower-income buyers, which could serve as a useful template for plug-in solar incentive design.
Research on rooftop solar adoption suggests that visibility matters: households are significantly more likely to go solar when they see a neighbor’s installation, a phenomenon known as the “solar contagion” effect. As residents see neighbors using plug-in solar, familiarity and visibility could encourage others to adopt too, helping the technology scale quickly across communities.
Federal agencies such as the Department of Energy could also issue national guidelines to help standardize and scale deployment, helping reduce confusion for manufacturers, retailers and households alike.
Coming Soon: A Faster, More Inclusive Path to Residential Solar
Plug-in solar may not be the complete solution to energy affordability or clean energy equity. But it does offer states a simple, high-impact way to expand affordable solar energy access — inexpensive, safe and ready to deploy today. Utah has demonstrated what’s possible when clear rules and streamlined pathways are created: millions of households, including renters and those unable to install traditional rooftop systems, can reduce electricity bills and participate in the clean energy transition.
The surge of plug-in solar bills introduced across at least 24 states shows that policymakers increasingly recognize this opportunity. By clarifying safety standards, defining zero-export systems, and protecting renter rights, states can unlock a technology that has already proven to work at scale. Federal agencies can reinforce that progress with national guidelines that provide a consistent framework to work within.
With thoughtful policy leadership, plug-in solar could scale quickly in the U.S., opening the door to lower electricity bills and expanded clean energy ownership for millions who have traditionally been left out. This is a chance to make the energy transition more equitable, more affordable and more accessible for all.
