Clean Energy Group
Solar combined with energy storage (solar+storage) can provide cost savings and keep essential services powered during grid outages. Clean Energy Group has published a series of short fact sheets answering the following frequently asked questions about solar+storage: These fact sheets are adapted from Clean Energy Group’s 2024 publication, Understanding Solar+Storage: Answers to Commonly Asked Questions…
Green hydrogen and green ammonia are touted as potential replacements for fossil fuels, but their actual environmental benefits are questionable. This fact sheet looks at the risks of hydrogen combustion.
Green hydrogen and green ammonia are touted as potential replacements for fossil fuels, but their actual environmental benefits are questionable. This fact sheet investigates the pros and cons of green ammonia.
In July 2025, Congress acted to accelerate the phase-out of the Investment Tax Credit (ITC), bonus credits and Direct Pay provision. Community-serving solar, wind, and energy storage projects are typically eligible for a 30% baseline credit, available to tax-exempt entites through Direct Pay. This fact sheet provides a timeline for the ITC eligibility of both…
This Direct Pay Fact Sheet details which types of tax-exempt entities are eligible to receive direct pay, outlines the process to receive direct pay, and introduces additional resources.
This fact sheet evaluates the viability of hydrogen as a long duration energy storage (LDES) technology. It examines the costs, efficiency, infrastructure considerations, and potential harms of hydrogen power plants.
This video profiles the solar+storage installation at the Kenzi Apartments, a senior affordable housing building in the Roxbury neighborhood of Boston.
This fact sheet covers the inefficiencies of hydrogen liquefaction, on top of the existing inefficiencies of hydrogen production. It details the high costs, high energy consumption, losses due to evaporation, safety concerns, storage and transportation issues, and global warming impacts of hydrogen liquefaction.
This CEG report contains new analysis evaluating the feasibility of hydrogen power plants as long-duration energy storage resources, based on cost competitiveness as well as equity and environmental impacts.
Comments on the Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units
Clean Energy Group (CEG) submitted these comments to U.S. Environmental Protection Agency (EPA) administrator Lee Zeldin in regards to Docket ID No. EPA-HQ-OAR-2025-0124.