Community Solar Crosses 10 GW: The Markets Working and the Barriers Still Blocking Growth

US community solar installed capacity passed 10 gigawatts cumulative in 2025, reaching approximately 10.1 GWdc by year-end, according to Wood Mackenzie's April 2026 market report. Annual installations in 2025 totaled 1,435 MWdc — a 25% contraction from 2024, driven by a slowdown in New York and other mature markets — even as the cumulative total crossed the 10 GW threshold. The market is projected to rebound roughly 12% in 2026, led by Illinois and Mid-Atlantic state programs. That cumulative capacity represents millions of households receiving electricity bill credits from shared solar arrays they don't own and couldn't install themselves: renters, condo residents, apartment dwellers, homeowners with shaded or structurally unsuitable rooftops, and lower-income households who have historically been the last to benefit from rooftop solar economics. Community solar is, for these subscribers, the only form of locally generated renewable electricity available to them.

The market is geographically concentrated. New York, Illinois, Massachusetts, and Minnesota account for approximately 70% of installed capacity nationally, driven by state community solar statutes that mandate utility participation in virtual net metering and establish the legal framework for subscription billing. New York leads with approximately 2,410 MWdc — around 24% of the national total — confirmed by Governor Hochul as the top community solar market in the United States. Illinois's Adjustable Block Program added an income-qualified component requiring at least 50% of capacity in each project to be reserved for households at or below 80% of area median income — the most studied low-income access requirement nationally, and one that has directly influenced similar provisions in Maryland, Colorado, and New Jersey's subsequent legislation. In Illinois's program, income-qualified subscribers receive bill credits at full retail rate rather than the lower wholesale rate offered to standard residential subscribers, a design decision that materially improves the economics for the households with the most to gain from reduced electricity costs.

The 30 states without community solar statutes represent the barrier side of the ledger. Without a state mandate for utility participation in virtual net metering, community solar cannot function at scale — utilities will not voluntarily create billing credit arrangements that reduce revenue without regulatory compulsion. States without community solar statutes include most of the Southeast — Alabama, Mississippi, Louisiana, Tennessee, Georgia — as well as large portions of the Mountain West and Plains states. Many of these states have significant solar resources and cost-burdened residential populations that would benefit most from accessible solar access. Advocacy organizations in several of these states have pursued regulatory proceedings at public utility commissions, with mixed results.

Federal policy has played a supporting role in states that do have community solar frameworks. The IRA's clean electricity investment tax credit (ITC/EITC) available to community solar projects at 30% base, plus adders for domestic content and energy community siting, has improved project economics and attracted institutional capital. The Low-Income Communities Bonus Credit under Section 48E provides an additional 10–20% ITC adder for projects where at least 50% of capacity serves income-qualified households — the first federal mechanism explicitly incentivizing affordable community solar. Treasury guidance on the bonus credit program has been refined through 2023–2025, including carryforward provisions after the first allocation round was substantially oversubscribed.

For households in states with active community solar markets, the subscription process is straightforward. Aggregators including Arcadia, EnergySage, and Solstice operate in most states with community solar statutes and provide matching services that handle utility paperwork. Most subscriptions require no upfront cost, carry one-to-three year terms, and deliver bill credits at 5–15% below the retail rate you'd otherwise pay for grid power — the developer's margin. Income-qualified programs typically offer larger discounts, often 20–30% below retail, funded by a combination of the ITC adder and program design mandates. Eligibility criteria vary by state and program; SEIA's community solar resources at seia.org and the EnergySage marketplace are the most current guides to program availability by state.