Dozens of U.S. states are accelerating legislative efforts to permit residents to install plug-and-play micro solar systems, commonly known as "balcony solar," aiming to reduce household carbon emissions and daily electricity costs. On May 7, local time, Colorado formally signed a related bill, further safeguarding residents' rights to use this technology. Meanwhile, a similar bill in Illinois has stalled due to opposition from industry unions.
Balcony solar systems are simple to install, with global standard equipment typically ranging from 200 watts to 1600 watts in capacity. Because they generate very little electricity, primarily for basic household needs, and rarely feed excess power back into the public grid, many states are passing legislation to exempt these certified low-wattage panels from traditional grid interconnection requirements. On May 7, Colorado Governor Jared Polis officially signed "House Bill 26-1007." This bill explicitly prohibits utility companies and homeowners' associations from imposing unreasonable restrictions or charging extra fees for plug-and-play solar systems, with the provisions set to take effect on January 1, 2027. Following Utah's passage of the nation's first balcony solar bill in 2025, Maine also completed related legislation this spring. Currently, over half of U.S. states are reviewing such bills, with those in Maryland and Virginia awaiting gubernatorial signatures.
Despite the overall positive trend, legislative progress in some areas faces significant resistance from stakeholders. In Illinois, the proposed bill originally aimed to exempt systems of 1200 watts or less from interconnection agreements with utility companies and to prohibit landlords from blocking residents from installing small arrays of 391 watts or less. However, with only three weeks left in the legislative session, the state's powerful electrical workers' union protested on safety grounds, leading to a legislative impasse. An amendment proposed on April 24 even called for a complete ban on plug-and-play solar systems until the National Electrical Code is updated to include standards for such arrays—a process not expected until late 2028 at the earliest.
U.S. environmental and clean energy advocacy groups have expressed strong dissatisfaction with this amendment. Supporters argue that other states that have already passed related legislation have not imposed such restrictions and that the risks associated with connecting small solar panels are comparable to those of common household appliances like washing machines. Kady McFadden, a clean energy policy lobbyist in Illinois, emphasized that the core purpose of the legislation is to select compliant components to ensure consumer safety while promoting the adoption and deployment of micro renewable energy technologies. Given the current irreconcilable differences among parties, state legislators pushing the bill have decided to temporarily set it aside for the current session.
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