Ten states have legalized backyard and balcony solar you can plug into a wall outlet. The panels themselves are a commodity race to the bottom. Whoever controls the certified inverter and the retail shelf controls the market.
Plug-in solar is a low-end disruption of the residential solar business, and it arrives at the worst possible moment for the expensive rooftop model. The hardware earns almost nothing: one nonprofit sells kits at cost on purpose. The value sits in the one safety-critical part that every legal system needs, the microinverter, and in distribution. A German company just proved where the money goes when it put these kits on the shelf at IKEA.
Melani Jackson watched a YouTube video, set four panels in her Salt Lake City backyard, and trimmed about $77 off her power bill over six months. She spent no time on permits and hired no electrician. That is the whole pitch, and millions of anxious ratepayers find it appealing. Residential electricity rates rose about 7 percent over the past year, and one in six U.S. households has fallen behind on its electric bills, according to the National Energy Assistance Directors Association. A $414 kit that lets you do something, anything, about that lands hard right now.
What Happened
Utah legalized plug-in solar in 2025. Ten states have followed, including New Jersey, Virginia, and Colorado, and lawmakers in California, Massachusetts, New York, and Pennsylvania are weighing their own bills. The systems skip the two things that make rooftop solar slow and expensive: permits and installers. You buy a panel or two, plug the inverter into a standard outlet, and start shaving pennies off your bill.
The technology sat in legal limbo in the U.S. for years because American electrical codes were never written for consumers pushing power backward through a wall socket. That changed in December 2025, when UL Solutions published UL 3700, the first North American safety standard built for plug-in photovoltaics. In July 2026, Hoymiles cleared the first microinverter certified to that standard, the HiFlow Pro. No full plug-in system has earned UL certification yet, but the hardest part of the safety puzzle, the inverter, now has a certified product. That gap between a certified component and a certified system is where the next year of competition happens.
The Backstory
Germany ran this experiment first. It legalized plug-in solar in October 2024, and 800,000 people registered systems in the first three months. Germans now buy the kits at IKEA. More than a million systems are registered today. The catch for American buyers: the German electrical system differs enough that panels sold there will not work here, so the U.S. market had to build its own supply chain and its own safety standard from scratch.
Conventional rooftop solar, meanwhile, lost its footing on two fronts. A full rooftop build can run as high as $36,000 and take months of permitting. States, pushed by utilities, cut the bill credits homeowners earn for sending excess power to the grid, which gutted the payback math. Then Congress killed the subsidy. The One Big Beautiful Bill Act, signed in July 2025, ended the 30 percent residential solar tax credit (Section 25D) for any system finished after December 31, 2025. A homeowner who wants to own panels in 2026 gets no federal help. The lease-and-PPA credit that props up companies like Sunrun survives through 2027, but the owner-buyer path lost its biggest incentive right as a $414 alternative became legal.
The Plan
Watch how three sellers are positioning, because each reveals a different bet on where value lands.
Bright Saver, a California nonprofit, sells its two-panel, 360-watt kit at cost for $414.17 and makes zero profit. Its stated goal is to drag the whole category’s prices down and pressure for-profit sellers to follow. Read that as a business signal: an organization is deliberately commoditizing the panel-and-frame layer, betting nobody should earn a fat margin there.
Craftstrom and EcoFlow sell larger systems for $1,300 to $2,600. Craftstrom ships to all 50 states by leaning on existing certification standards, a gray-market land grab ahead of full UL approval, and its sales rose 50 percent in the past year. EcoFlow plays it safe and ships only to Utah and Maryland, where the law is settled. Both say they plan to seek full UL certification. Whoever gets there first sells the only product a cautious retailer, landlord, or condo board will touch, and in a safety-sensitive category that trust premium is the moat.
Hoymiles is not in the headlines, and it is the company to watch. It makes the certified microinverter. Every legal kit in America needs one, whoever slaps their brand on the panels. That is the picks-and-shovels position in this gold rush.
The Business Model Angle
Plug-in solar has no hardware moat. A panel is a panel, an aluminum frame is an aluminum frame, and a nonprofit is racing the assembled-kit price to cost on purpose. Anyone can source panels from the same factories and undercut on price until the margin disappears. Selling the most kits is not the same as making the most money, and in this category those two things pull apart fast.
The margin lives in three places. First, the certified microinverter, the one part that must shut off within a second of a grid outage to keep a lineman safe, the one component regulators actually scrutinize. Hoymiles owns that chokepoint today. Second, distribution and trust: the German outcome was not a panel brand winning, it was IKEA becoming the shelf. The U.S. company that becomes the default retail channel captures buyers the way a solar lead-generation operation captures homeowners, by owning the moment of decision rather than the product. Third, the temporary monopoly of first full certification, which lets one seller charge a premium to every risk-averse gatekeeper until competitors catch up.
For rooftop incumbents, plug-in is a classic low-end disruption. It serves the customer the $36,000 model cannot: the renter, the condo owner, the ratepayer who wants a $400 experiment instead of a 20-year contract. Disruption theory says the incumbent ignores the cheap, low-margin bottom of the market until the entrant moves upmarket. The larger $2,600 kits are already the first step up that ladder.
The Risk
The bear case is strong, and a sharp reader should hold it next to the bull case.
The savings are tiny. Jackson banked $77 in six months. Alex Ottoboni, who hung two panels off his Bay Area condo balcony, saves $5 to $7 a month on a bill that runs about $400. The entry kit pays for itself in roughly two to three years, which is fine, but the larger systems stretch that timeline, and the real driver of demand looks psychological, a sense of control, rather than financial. A product bought for emotional reasons can stall as a novelty once the early adopters are saturated.
Utilities hold real regulatory power and are using it. Pedro Pizarro, CEO of Edison International, says he backs the technology but opposed California’s bill because it did not go far enough to protect workers, and he warned the systems should not receive unfair subsidies. Every state fight gives incumbents a venue to slow the rollout or load it with requirements that raise costs.
And winning a commodity market may not be worth much. If the panel layer earns nothing and only Hoymiles and a first-certified brand capture margin, most companies chasing this boom are fighting over a thin-margin hardware business. The story of the next two years is not how many kits sell. It is who sits at the chokepoint when they do.
Quick Questions
Is plug-in solar legal where I live? Ten states have passed laws, starting with Utah in 2025, and roughly two dozen more are considering bills. California, New York, Massachusetts, and Pennsylvania are among them.
Is it safe and certified? UL published the plug-in standard (UL 3700) in December 2025, and the first certified microinverter arrived in July 2026. No full system has earned UL certification yet, so buyers today are trusting components and gray-market sellers ahead of the finish line.
How much can it actually save me? Real-world numbers land between $5 and $15 a month for one to four panels. Meaningful over years, small month to month.
Does this threaten Sunrun and rooftop installers? Not their core high-value customer, not yet. It serves renters and condo owners the rooftop model never could, which is exactly how low-end disruption starts.
The Business Model Analyst Take
Plug-in solar is a great product and a hard business. The panel is a commodity, the demand is real, and the two facts together mean most sellers will grind on thin margins while a few chokepoint owners take the profit. Bright Saver’s decision to sell at cost is not charity noise, it is a preview of where the assembled-kit price is headed for everyone.
If you are building or investing in this space, do not sell panels. Own the certified inverter, become the retail shelf, or be the first brand a landlord trusts. Germany already ran the tape: the winner was the shelf, not the module. The U.S. version is legal now, the subsidy that favored the expensive rooftop model is gone, and power bills keep climbing. The category will grow. The margin will concentrate. Position for the second thing, not the first.
Based on reporting by Ivan Penn and Claire Brown for The New York Times, “Plug-In Solar Panels Are Starting to Sprout in U.S. Backyards” (July 31, 2026), with additional analysis by Business Model Analyst.
