Better Clean Energy Tracking Could Cut 42x More Emissions

Imagine two companies both claiming to run on 100% clean energy, but one actually cuts 42 times more pollution than the other.

That's exactly what researchers at the Electric Power Research Institute just discovered. The difference comes down to how companies track their renewable energy use.

Most businesses today use "annual matching." They buy renewable energy credits over a year to offset their total electricity use. It's like saying you ate healthy in 2024 because you had salads in June, even though you ate burgers every other month.

A handful of tech companies including Microsoft and Google pioneered a different approach called "hourly matching" or "24/7 carbon-free energy." They match their actual electricity consumption with clean power in the same hour, on the same grid where they operate.

The climate math is striking. If 10% of US commercial customers used annual matching, it would cut about 1 million tons of CO2 per year. Switch that same 10% to hourly matching, and emissions drop by 42 million tons annually.

Killian Daly from the nonprofit EnergyTag explains why the gap is so large. "Buying a solar certificate produced at midday in the middle of June and using it to say that you're consuming solar at midnight on Christmas Eve is obviously completely absurd," he said. "But that's the way a lot of companies operate today."

Hourly matching forces real change. Companies can't just buy cheap certificates. They have to invest in batteries and other technologies that actually deliver clean power when the sun isn't shining and the wind isn't blowing.

The timing of this research matters. Microsoft, one of the few companies committed to hourly matching 100% of the time by 2030, is now reconsidering that goal as it races to build AI data centers. The energy demands of artificial intelligence are testing even the most ambitious climate commitments.

The Ripple Effect

Despite these challenges, the movement is growing. The European Union is incorporating 24/7 clean energy into policy. New carbon accounting standards are embracing the approach. Texas alone has added the solar equivalent of 12 nuclear reactors in just three years.

Arin Kaye, who led the research at EPRI, sees the bigger picture. "When carbon-free electricity must be available hour by hour, all day, every day, it could drive investment and operation of resources that could displace fossil generation in the hours it would otherwise run," she said.

The study proves that how we measure progress matters just as much as the progress itself.