Plug In for Renewable Energy
December 22, 2016 | Michigan State UniversityEstimated reading time: 3 minutes
A new study shows a huge US market for plug and play solar energy, with billions of dollars in retail sales and energy savings. So what's holding up widespread use?
Support for solar energy is vast. According to a 2015 Gallup poll, 79 percent of Americans want the US to put more emphasis on developing solar power. Most of the same people, unfortunately, can’t afford to install solar energy systems in their homes. Even after federal tax credits, installing solar panels to cover all of a family's electricity needs can cost tens of thousands of dollars. For others, a home solar system isn’t a consideration because they rent, or move frequently.
But Michigan Technological University’s Joshua Pearce says he knows the solution: plug and play solar.
“Plug and play systems are affordable, easy to install, and portable,” says Pearce, an associate professor of materials science and engineering and of electrical and computer engineering. “The average American consumer can buy and install them with no training.”
In a study funded by the Conway Fellowship and published in Renewable Energy (DOI: 10.1016/j.renene.2016.11.034), Pearce and researchers Aishwarya Mundada and Emily Prehoda estimate that plug and play solar could provide 57 gigawatts of renewable energy – enough to power the cities of New York and Detroit – with potentially $14.3 to $71.7 billion in sales for retailers and $13 billion a year in cost savings for energy users.
Sounds great, right? Well, there’s one problem: in many parts of the United States, electrical regulations don’t allow consumers to plug and play.
Small Investment, Big Return
Plug and play solar panels connect to an ordinary electrical outlet. You’re still on the grid, but you’ve become a “prosumer” — a consumer of energy who also produces it. The panels range in wattage and are relatively affordable, with some costing just a couple hundred dollars apiece. A prosumer can start small, with just one panel, and slowly build up over time to a system that produces 1 kilowatt of energy, the equivalent of powering 10 100-watt LED light bulbs.
The panels are also portable. So, for example, if a college student buys one 250-watt plug and play panel each year for four years, reaching 1 kilowatt of energy by senior year, that student can unplug the four panels when she graduates and take them to her next destination.
Pearce estimates that plug and play systems could generate more than four times the amount of electricity generated from all of US solar last year.
“The vast majority of this energy never leaves the home,” Pearce says. “It’s the equivalent of handling a hair dryer load. We’re talking about almost nothing on the electrical grid – but that nothing adds up. It’s an appliance with a high rate of return.”
Safe, Simple — And Largely Prohibited
In the United States, a patchwork of local jurisdictions and regulations make it difficult to figure out if and where plug and play panels are allowed.
“You can buy the panels,” Pearce says, “but you might not be able to plug them in, depending on your utility.”
In a paper published earlier this year in Solar Energy (DOI: 10.1016/j.solener.2016.06.002), Pearce, Mundada and researcher Yuenyong Nilsiam reviewed all regulations in the US that would apply to plug and play systems. They found no safety or technical issues with the equipment on the market.
“This is an area where less regulation could really help renewable energy,” Pearce says. “We know that the technology is safe, and the law should reflect that.”
The risk, according to Pearce, is putting too much current on one circuit, so he recommends that homeowners keep their plug and play systems to a kilowatt or less. Simple precautions make this easy — if a panel is plugged into an outdoor outlet, for example, safety plugs on all other outdoor outlets on that circuit can prevent overload.
While some jurisdictions have recognized that there are no major safety or technical issues with plug and play panels, paperwork holds up the process. Potential prosumers often have to fill out complicated forms to fulfill utility requirements, and the paperwork and associated fees vary by utility. To simplify the process, Pearce and colleagues automated it, by writing open-source computer code that fills out every possible technical requirement. Utilities can easily use the free code on their websites.
“Some utilities have embraced plug and play, and some have ignored it because they think it’s a pittance,” Pearce says. “But plug and play solar is something that can help most Americans.”
Suggested Items
Data Paints a Picture—Can You See It?
01/09/2025 | Marcy LaRont, PCB007 MagazineAndrew Kelley is CTO of Xact PCB, a company founded by engineers with firsthand experience in PCB fabricators. Xact PCB has developed a cutting-edge system to monitor and predict the registration of inner layers through advanced registration control systems. By leveraging data collected from various production stages, Xact PCB’s GX tool enhances precision. It minimizes errors, ensuring that the final products meet their customers' exact specifications while eliminating the need for costly pilot lots.
Würth Elektronik Presents its Dual-wire ICLEDs
01/08/2025 | Würth ElektronikWürth Elektronik expands its range of WL-ICLEDs – RGB-LEDs with integrated controller (IC) – to include dual-wire ICLEDs. The components are addressable as pixels and consist of a red, green, and blue LED, as well as a pre-programmed IC in one package.
Bohemia Interactive Simulations, Rheinmetall Announce Strategic Partnership to Enhance Defense Simulation Technologies
01/08/2025 | BAE SystemsBohemia Interactive Simulations (BISim), a wholly-owned subsidiary of BAE Systems, Inc., and renowned provider of advanced simulation and training software solutions, and Rheinmetall AG, a leader in defense and security technologies, have announced the start of a strategic collaboration.
Curtiss-Wright Completes Acquisition of Ultra Energy
01/03/2025 | BUSINESS WIRECurtiss-Wright Corporation announced that it has completed the acquisition of Ultra Nuclear Limited and Weed Instrument Co., Inc. (“Ultra Energy”) for $200 million in cash. Ultra Energy is a leading global provider of safety-critical measurement and control systems to the Commercial Nuclear and Aerospace & Defense markets.
Laser Photonics, Fonon Technologies Deliver Training at Pearl Harbor Naval Shipyard & IMF for Effective Use of Laser Technology
01/03/2025 | BUSINESS WIRELaser Photonics Corporation (LPC), a leading global developer of industrial laser systems for cleaning and other material processing applications, in partnership with its sister company Fonon Technologies, announced the completion of training on the safe and optimal use of a DefenseTech laser system earlier purchased by the Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility (PHNSY & IMF).