Bentham Paulos, senior research associate for the national nonprofit Clean Energy States Alliance, calculates that with California’s average electricity price at 32 cents per kilowatt-hour, Bright Saver’s 360-watt kit would save a household in the state about $150 per year; that translates to a payback of about three years. The timeline can stretch from seven to 10 years in places like North Dakota, where electricity rates are lower.
Households could reap savings for decades. Solar panels and inverters can last 25 to 30 years, quietly producing power from sunlight that falls free on everyone on earth.
“The solar revolution is the great sunny hope of our time,” said Bill McKibben, longtime environmental journalist and co-founder of nonprofit advocacy group Third Act. With plug-in systems, “now everyone can participate.”
Bright Saver’s annual membership fee covers some of the nonprofit’s overhead; the group runs mainly on donor funding and says it can keep the discounted sales going for up to six months without more cash. But membership is also a way to rally balcony solar supporters.
“We’re building a constituency,” said Kevin Chou, co-founder of Bright Saver. “Joining a movement that’s actually winning is its own kind of power. Every Bright Saver member makes the case for saving money and fighting climate change a little harder for lawmakers to ignore.”
Regulations to ensure the consumer safety of balcony solar are still evolving in the U.S. But Bright Saver states that its kits are safe to use, as the individual components — the panels and inverters — have been certified by a nationally recognized testing laboratory, even though the system as a whole has not. (No system yet has.)
That limitation impacts where the nonprofit sells its kits. Some states are requiring complete-system certification. Bright Saver said it will block shipping to Maine, New York, and Vermont, which have passed bills with that mandate, according to the nonprofit. Other states, like Utah, which in 2025 became the first to legalize balcony solar, require only that the kits’ individual components are certified.
Still, component-level standards have been a concern to some because balcony solar injects power into a home’s wiring. In a worse-case scenario, a portable solar device could overheat a section of a home circuit if other appliances are drawing power from the system at the same time. If the circuit breaker — the safety mechanism — fails to detect what’s going on, then a fire could break out.
But a technical amendment that experts have proposed adding to the National Electrical Code, rules that all states use to safeguard people from electricity hazards, points out that the electrical wires in U.S. homes have some buffer built in. This margin isn’t enough for a larger 1,200-watt balcony solar setup, but it is sufficient to accommodate Bright Saver’s system.
Plugging 360 watts into a typical 15-amp circuit “can never damage” the 14-gauge copper wires commonly used, per the amendment’s explanatory notes. While the proposal hasn’t been adopted yet, Stryker expects it will be by September 2028, before the next scheduled update to the code is released.
“We designed our systems to be 360 watts because of what the NEC amendment tells us is safe,” Stryker said.
Balcony solar is still a new technology in the U.S., and not everyone is going to feel comfortable with it yet, Stryker said. But sentiment could shift “once we have tens of thousands of these [deployed], demonstrating that there are no house fires, even with the component-level certified systems,” Stryker said.
“And let’s not forget, Utah has had up to 1,200-watt systems in the wild for more than a year now,” she added. “We have no major safety incidents.”
