Manufacturers in the United States are on the verge of introducing a new generation of solar panels that could significantly increase energy production and challenge China’s dominance in the global solar market. Known as tandem solar panels, this technology adds multiple layers to conventional solar devices, boosting efficiency by as much as 25 percent compared to current models.

Several companies, including Tandem PV, First Solar, and Hanwha Qcells, have reported successful testing of these panels and are preparing for commercial release. Hanwha Qcells, a South Korean firm that acquired German manufacturer Qcells in 2012, has invested billions in production facilities in Georgia, including a plant in Cartersville. The company has tested its panels under various conditions—from LED light exposure to simulated hail impacts—in multiple locations such as the United States, Germany, Australia, Cyprus, and South Korea. These assessments aim to demonstrate the panels’ durability and 20- to 30-year lifespan in diverse climates.

Industry experts emphasize the importance of these tests in convincing energy producers, financiers, and investors of the new technology’s reliability. “The power industry is quite conservative in accepting new technologies,” said Fabian Fertig, head of tandem research and development at Qcells. Scientists have pursued tandem solar designs for decades, but only recently have advancements addressed concerns about potential degradation caused by heat, humidity, and severe weather.

While the U.S. solar industry sees tandem panels as the next frontier, challenges remain. Cost is a significant hurdle; estimates suggest that tandem panels could be three to three and a half times more expensive than traditional single-layer silicon panels. Current installation costs for conventional solar arrays range from approximately 93 cents to $1.06 per watt, according to the Solar Energy Industries Association. Andrés Gluski, CEO of the utility AES, highlighted that price competitiveness is critical since Chinese manufacturers produce solar panels at very low costs and control roughly 80 percent of the global market.

The United States' solar manufacturing sector has struggled in recent years due to China’s ability to sell panels at prices far below those of competitors in the U.S., Germany, and Japan. Governments in both the Biden and Trump administrations have implemented tariffs, subsidies, and other policies to revitalize domestic production, leading to the construction of new factories nationwide. However, regulatory obstacles also exist; federal permitting processes for new solar projects have sometimes been hindered by political resistance focused on promoting fossil fuels and nuclear energy.

Despite these challenges, energy researchers remain optimistic that tandem solar technology is close to commercial viability. Chetan Krishna, a principal at the Rocky Mountain Institute, warned that questions about long-term degradation persist but indicated the technology is nearing readiness. If successfully deployed at scale, tandem panels could enable more efficient use of land and rooftop surfaces to meet growing global electricity demands.

Solar power has rapidly expanded in the United States, contributing nearly 9 percent of the country’s electricity generation by 2025, up from 3 percent in 2020, according to the Energy Information Administration. Alongside advances in battery storage, which now pairs with solar to supply energy after sunset, the new technological breakthrough may help the U.S. accelerate its transition to cleaner energy sources while regaining competitiveness in the international solar market.