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The US clean energy and climate technology market is valued at over $500B and accelerating under the Inflation Reduction Act's $369B in climate incentives — the largest climate investment in US history. Solar, wind, battery storage, fuel cells, and carbon capture companies are scaling at unprecedented rates as the energy transition moves from policy ambition to industrial reality. Key 2025-2026 milestones include utility-scale battery storage reaching grid parity, offshore wind achieving first commercial-scale generation, and direct air capture costs falling below $400 per ton. America's energy future is being built today.
Curated by our tech editors. Practical, hands-on reviews weighted by community vote — updated as the field evolves.
NextEra Energy posted $24.5B in 2024 revenue and operates 35GW of renewable capacity — the largest clean energy portfolio of any company globally. Its Florida Power & Light subsidiary serves 12 million people, and NextEra Energy Resources is the world's largest generator of wind and solar energy. The company invested $55B in renewables over 2020-2025 and has committed to developing 23-30GW of new renewable and battery storage capacity by 2027.
First Solar is the only major US-manufactured solar panel producer with $3.3B in 2024 revenue, deploying cadmium telluride thin-film panels that use 98% less water and generate less carbon per watt than conventional silicon panels. Its Series 7 modules achieved 22.1% conversion efficiency in 2025. First Solar has 14GW of US manufacturing capacity, making it the largest US solar producer by volume, supplying utility-scale projects across Arizona, Ohio, and Alabama.

Sunrun is the #1 US residential solar installer with $2.3B in 2024 revenue and 800,000+ customers across 22 states. Its Brightbox battery storage product provides energy independence during grid outages and earns Virtual Power Plant revenue by selling stored energy back to utilities during peak demand. In 2025, Sunrun partnered with Ford and GM to integrate EV bidirectional charging into its home energy management system, creating a 1GW virtual battery network.
Bloom Energy generates $1.3B in revenue from its solid oxide fuel cell power systems that convert natural gas, hydrogen, or biogas into electricity at 65%+ efficiency with near-zero air pollutants. Its ES-5 server deployed at data centers for Apple, Google, and AT&T provides reliable on-site baseload power with no grid dependency. In 2025, Bloom launched its hydrogen electrolyzer product line, targeting green hydrogen production for industrial decarbonization at $2/kg by 2030.
Form Energy raised $800M+ to commercialize its iron-air battery technology, which stores energy for 100+ hours at $20/kWh — ten times cheaper than lithium-ion for multi-day storage. Its first utility-scale deployment with Georgia Power went live in 2025, providing 3 days of backup storage for a 15MW system. Form Energy's batteries use iron, water, and air — abundant, non-toxic materials — solving the long-duration storage problem that has limited renewable energy to weather-dependent generation.
Enphase Energy posted $1.4B in 2024 revenue with 68M+ microinverters shipped — each one a small computer that independently optimizes solar output from a single panel. Its IQ8 microinverter series can form a solar-powered microgrid during outages without any backup battery required. Enphase's 2025 expansion into Europe generated 30%+ of revenue from international markets, and its IQ Battery 5P achieved the highest power output of any residential AC-coupled battery.
Sunnova generated $649M in 2024 revenue with 400,000+ solar-as-a-service customers, offering zero-money-down solar and battery installation with 25-year performance guarantees. Its Adaptive Home platform integrates solar, battery, EV charging, and smart thermostats into a unified energy subscription. In 2025, Sunnova launched its Solar Microgrid-as-a-Service for rural communities and island markets, providing clean energy independence to areas with unreliable grid infrastructure.
Orsted invested $4B+ in US offshore wind development, completing the South Fork Wind project in 2024 — the first commercial-scale US offshore wind farm — powering 70,000 Long Island homes. Its Sunrise Wind and Revolution Wind projects will add 1.7GW of capacity in 2025-2026. Orsted's US division employs 1,500+ people across four state partnerships (New York, Connecticut, Rhode Island, New Jersey) targeting 9GW of total US capacity by 2030.
Carbon Clean raised $150M to scale its modular industrial carbon capture systems, with 300+ installations capturing CO2 from cement, steel, and chemical plants. Its CycloneCC technology reduces carbon capture equipment size by 10x vs. conventional systems, cutting capital costs to $30-50M per 100,000-ton annual capture. In 2025, Carbon Clean broke ground on a 500,000-ton/year cement plant capture project in India — the largest ever announced for the cement sector.
Turntide Technologies raised $400M at a $2B valuation to commercialize its Smart Motor System, which reduces energy consumption in HVAC, industrial fans, and agricultural pumps by 64-70%. Its switched reluctance motor architecture eliminates rare earth magnets while delivering variable-speed efficiency that traditional AC motors cannot match. In 2025, Turntide partnered with Tesco and Whole Foods to deploy 10,000+ smart motors in refrigeration and HVAC systems across UK and US stores.
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NextEra Energy posted $24.5B in 2024 revenue and operates 35GW of renewable capacity — the largest clean energy portfolio of any company globally. Its Florida Power & Light subsidiary serves 12 million people, and NextEra Energy Resources is the world's largest generator of wind and solar energy. The company invested $55B in renewables over 2020-2025 and has committed to developing 23-30GW of new renewable and battery storage capacity by 2027.
First Solar is the only major US-manufactured solar panel producer with $3.3B in 2024 revenue, deploying cadmium telluride thin-film panels that use 98% less water and generate less carbon per watt than conventional silicon panels. Its Series 7 modules achieved 22.1% conversion efficiency in 2025. First Solar has 14GW of US manufacturing capacity, making it the largest US solar producer by volume, supplying utility-scale projects across Arizona, Ohio, and Alabama.

Sunrun is the #1 US residential solar installer with $2.3B in 2024 revenue and 800,000+ customers across 22 states. Its Brightbox battery storage product provides energy independence during grid outages and earns Virtual Power Plant revenue by selling stored energy back to utilities during peak demand. In 2025, Sunrun partnered with Ford and GM to integrate EV bidirectional charging into its home energy management system, creating a 1GW virtual battery network.
Bloom Energy generates $1.3B in revenue from its solid oxide fuel cell power systems that convert natural gas, hydrogen, or biogas into electricity at 65%+ efficiency with near-zero air pollutants. Its ES-5 server deployed at data centers for Apple, Google, and AT&T provides reliable on-site baseload power with no grid dependency. In 2025, Bloom launched its hydrogen electrolyzer product line, targeting green hydrogen production for industrial decarbonization at $2/kg by 2030.
Form Energy raised $800M+ to commercialize its iron-air battery technology, which stores energy for 100+ hours at $20/kWh — ten times cheaper than lithium-ion for multi-day storage. Its first utility-scale deployment with Georgia Power went live in 2025, providing 3 days of backup storage for a 15MW system. Form Energy's batteries use iron, water, and air — abundant, non-toxic materials — solving the long-duration storage problem that has limited renewable energy to weather-dependent generation.
Enphase Energy posted $1.4B in 2024 revenue with 68M+ microinverters shipped — each one a small computer that independently optimizes solar output from a single panel. Its IQ8 microinverter series can form a solar-powered microgrid during outages without any backup battery required. Enphase's 2025 expansion into Europe generated 30%+ of revenue from international markets, and its IQ Battery 5P achieved the highest power output of any residential AC-coupled battery.
Sunnova generated $649M in 2024 revenue with 400,000+ solar-as-a-service customers, offering zero-money-down solar and battery installation with 25-year performance guarantees. Its Adaptive Home platform integrates solar, battery, EV charging, and smart thermostats into a unified energy subscription. In 2025, Sunnova launched its Solar Microgrid-as-a-Service for rural communities and island markets, providing clean energy independence to areas with unreliable grid infrastructure.
Orsted invested $4B+ in US offshore wind development, completing the South Fork Wind project in 2024 — the first commercial-scale US offshore wind farm — powering 70,000 Long Island homes. Its Sunrise Wind and Revolution Wind projects will add 1.7GW of capacity in 2025-2026. Orsted's US division employs 1,500+ people across four state partnerships (New York, Connecticut, Rhode Island, New Jersey) targeting 9GW of total US capacity by 2030.
Carbon Clean raised $150M to scale its modular industrial carbon capture systems, with 300+ installations capturing CO2 from cement, steel, and chemical plants. Its CycloneCC technology reduces carbon capture equipment size by 10x vs. conventional systems, cutting capital costs to $30-50M per 100,000-ton annual capture. In 2025, Carbon Clean broke ground on a 500,000-ton/year cement plant capture project in India — the largest ever announced for the cement sector.
Turntide Technologies raised $400M at a $2B valuation to commercialize its Smart Motor System, which reduces energy consumption in HVAC, industrial fans, and agricultural pumps by 64-70%. Its switched reluctance motor architecture eliminates rare earth magnets while delivering variable-speed efficiency that traditional AC motors cannot match. In 2025, Turntide partnered with Tesco and Whole Foods to deploy 10,000+ smart motors in refrigeration and HVAC systems across UK and US stores.
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