The U.S. Postal Service is speeding up its transition to zero-emissions deliveries. The agency announced Tuesday that it will spend $9.6 billion over the next five years to convert 66,000 of its delivery vehicles to electric.

The plan calls for electrifying 75% of the Postal Service’s Next Generation Delivery Vehicles and beginning to acquire 100% electric versions of its trucks starting in 2026. Funded with $3 billion from the Inflation Reduction Act Congress passed earlier this year, the strategy also includes the installation of EV chargers at hundreds of Postal Service facilities. 

Of the IRA funds, $1.3 billion will be spent on electric delivery vehicles and $1.7 billion will go toward building charging infrastructure. The USPS will contribute $6.6. billion of its own funds as part of a 100,000-vehicle modernization plan.

“Moving packages from point A to point B in a way that’s cleaner, more cost-effective and accelerating toward an electric vehicle future stamped ‘Made in America.’ This is the Biden climate strategy on wheels, and the U.S. Postal Service delivering for the American people,” President Joe Biden’s national climate adviser Ali Zaidi said in a statement. 

As part of Biden’s executive order on Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability, the White House has set a goal of acquiring 100% zero-emissions light-duty vehicles by 2027. The federal government operates the world’s largest vehicle fleet with 650,000 vehicles. The USPS fleet is its largest.