Plug-in Solar Panels Gain Traction as Energy Costs Rise | NPR

The promise of easily accessible solar power is running into resistance, not from technological hurdles, but from established utility companies. A growing trend of “plug-in” solar panels – designed to connect directly to standard outlets, like a household appliance – is gaining traction as a way for homeowners and renters to lower energy costs. However, utilities are voicing concerns, prompting delays in legislative efforts aimed at streamlining their adoption. The core of the debate centers on safety and grid reliability, with utilities arguing that these systems pose risks to lineworkers and the electrical grid, whereas proponents maintain those concerns are overblown and motivated by a desire to protect existing revenue streams.

The appeal of these panels is clear. Unlike traditional rooftop solar installations, which can cost upwards of $20,000 and require professional installation, plug-in panels are significantly cheaper and easier to deploy. Bright Saver, a California nonprofit, estimates costs are considerably lower, potentially allowing homeowners to recoup their investment within seven years. This accessibility is particularly attractive as Americans grapple with rising energy bills and as concerns about climate change intensify. Germany has already seen widespread adoption, with over 1.2 million of these small systems registered with the government, demonstrating their potential for broader implementation.

Legislative Pushback and Utility Concerns

Several states have begun to consider legislation to facilitate the use of plug-in solar. Utah enacted a law last May to support these systems, and around 30 similar bills have been introduced across the country. However, the path forward isn’t clear. Utilities are actively lobbying against these bills, raising safety concerns and successfully delaying votes in at least five states – Arizona, Georgia, New Mexico, Washington, and Wyoming. The central argument revolves around the potential for these systems to continue generating electricity during power outages, creating a dangerous situation for utility workers attempting to restore service.

Emily Pateuk, a lobbyist with Georgia Electric Membership Corp., articulated these concerns during a legislative hearing, stating the safety of lineworkers was paramount. Following her comments, the committee chairman postponed a vote on a related bill until safety questions could be addressed. Similar arguments were presented in Wyoming, where lawmakers ultimately decided to let a plug-in solar bill die without a vote. Rocky Mountain Power’s attorney, Nathan Nicholas, emphasized the need for connection agreements and certification to ensure the safety of the grid and its workers.

Addressing Safety Concerns: UL Solutions Certification

Proponents of plug-in solar argue that safety concerns are being overstated and that utilities are primarily motivated by the potential loss of revenue. Every kilowatt-hour generated by a plug-in panel is one less kilowatt-hour sold by the utility. Cora Stryker, co-founder of Bright Saver, suggests that raising safety concerns is a tactic used by those with a vested interest in maintaining the status quo.

However, safety is a legitimate consideration. Traditional rooftop solar systems are generally inaccessible to the public, minimizing risk. Plug-in panels, can be easily installed and accessed, potentially exposing individuals unfamiliar with electrical systems to hazards. To address these concerns, UL Solutions launched a testing and certification program in January. This program aims to establish safety standards for plug-in solar systems, ensuring they meet rigorous requirements before being sold to consumers. Manufacturers are now required to obtain UL certification, a process that assesses and mitigates potential safety risks. Ken Boyce, VP of Engineering at UL Solutions, explained that the certification process addresses issues like shock hazards and ensures the systems operate safely during grid outages.

The German Experience and Potential for Growth

The concerns raised by utilities are not new. Germany faced similar objections when plug-in solar began to gain popularity nearly a decade ago. However, after installing over a million systems, no safety incidents have been reported when the panels are used as instructed, according to research funded by the U.S. Department of Energy.

Virginia is poised to become the second state to embrace plug-in solar, with both chambers of the legislature passing a bill awaiting the governor’s signature. This momentum suggests a growing recognition of the benefits of this technology. Stryker believes that legislative changes in five or more states will trigger widespread adoption, as consumers seek ways to reduce their electricity bills and embrace more sustainable energy sources.

What’s Next for Plug-in Solar?

The future of plug-in solar hinges on several factors. Continued legislative progress, coupled with the widespread adoption of UL Solutions certification, will be crucial for building consumer confidence and ensuring safety. As more manufacturers obtain certification, and as states adopt supportive policies, the cost of these systems is likely to decrease, making them even more accessible to a wider range of consumers. The ongoing debate highlights a broader tension between traditional utility models and the growing demand for distributed energy resources, and the outcome will likely shape the future of the energy landscape.

The process of evaluating and updating safety standards will also be ongoing. UL Solutions will continue to refine its testing protocols based on real-world data and feedback from the industry. Research into the long-term impacts of plug-in solar on grid stability and reliability will be essential for informing future policy decisions.