Subsidies aside, DOE targets $0.03 per kWh solar to undercut fossil fuels by 2030

The U.S. Department of Energy Solar Energy Technologies Office set its sights on driving unsubsidized utility scale photovoltaic power down to $0.03 per kilowatt-hour by 2030. Reaching that threshold cuts the levelized cost of energy in half from its 2017 benchmark of $0.06 per kilowatt-hour, positioning solar as one of the least expensive options for new electricity generation in the United States and undercutting the operational costs of most fossil fuel generators.

To make these targets reality, federal officials are backing the roadmap with direct project capital, technical programs, and regulatory initiatives. The urgency of cost reduction goals is heightened by changing federal tax policy, as statutory phase-outs and sunset timelines for federal Investment Tax Credits and Production Tax Credits mean the industry must achieve unsubsidized parity far faster than previously modeled under longer-term federal support frameworks.

When federal officials first launched the SunShot Initiative in 2011, solar power supplied less than 0.1% of the domestic power grid with just 3 GW of installed capacity. By 2017, cumulative solar installations surpassed 47 GW to supply more than 1% of national demand.

During that initial stretch, utility scale photovoltaic generation costs plummeted from $0.28 to $0.06 per kilowatt-hour, hitting the original 2020 target three years ahead of schedule. Residential solar costs fell from $0.52 to $0.16 per kilowatt-hour over the same timeframe, while commercial solar costs dropped from $0.40 to $0.11 per kilowatt-hour.

To push utility scale PV from that $0.06 baseline to the $0.03 per kilowatt-hour target, the solar office is pouring capital into advanced manufacturing incubators and materials research, including dedicated funding programs targeting thin-film tandem solar cells and low-cost silicon wafer production through its Manufacturing and Competitiveness initiative. Federal researchers are also backing high-efficiency module technologies designed to increase energy yield per panel while reducing land footprint and balance of system hardware requirements.

To deliver dispatchable clean power during peak demand hours, federal targets for concentrating solar power focus heavily on thermal energy storage. The target for baseload concentrating solar power equipped with at least 12 hours of thermal storage stands at $0.05 per kilowatt-hour. For peaking configurations designed for shorter bursts of electricity under six hours of storage, the target is set at $0.10 per kilowatt-hour.

Federal agencies are actively directing targeted competitive grants into concentrated thermal power research, funding advanced heat transfer fluids, high-temperature thermal energy storage media, and solar-thermal chemical processes. The awards aim to prove out next-generation power cycles that can run high-efficiency turbines at elevated temperatures, directly challenging natural gas peaker plants on cost and performance.

Long-term energy storage goals further bolster grid integration efforts. Federal roadmaps target a capital cost of $100 per kilowatt-hour for eight-hour battery storage systems by 2040. Regional energy modeling shows that pairing low-cost utility solar with $100 per kilowatt-hour storage would allow solar and battery assets to supply a dominant share of total U.S. electricity generation by 2050.

To support grid reliability as variable generation scales, federal program officers are deploying tens of millions in financial awards toward advanced grid integration tools through programs like the Operation and Planning Tools for Inverter-Based Resource Management initiative. These efforts fund grid-forming inverter technology, real-time power flow modeling software, and automated dynamic controls to help transmission operators balance high volumes of solar and storage.

Beyond equipment manufacturing and hardware price drops, the program focuses on clearing soft-cost barriers that frequently delay project deployment. Key priorities include shortening project development cycles, streamlining interconnection queue backlogs, enhancing inverter communications and dynamic controls, and expanding access through community solar programs.

To tackle mounting interconnection queue bottlenecks, federal agencies launched the Interconnection Innovation e-Xchange initiative, establishing roadmap frameworks and distributing technical assistance to deploy grid-enhancing technologies like dynamic line ratings and topology optimization through its Distributed Energy Resource Interconnection Roadmap.

On the municipal and community scale, federal programs continue expanding automated permitting tools like SolarAPP+ and deployment initiatives through Solar Technical Assistance to streamline local land-use reviews and reduce project overhead.