The increase in tariffs for lithium-ion batteries from China from 7% to 25% was announced last week (14 May), effective this year for EV batteries and from 2026 for non-EV batteries, including battery energy storage system (BESS). Recent and expanded tariffs have significantly impacted battery-related products' cost, availability, and logistics. This article provides a detailed, fact-based overview of the 2025 battery tariffs, highlighting their scope, timelines, and effects on U. manufacturers, buyers, and installers. However, 2025 represents a pivotal year, as federal tarifs, tax incentive structures, and domestic sourcing require the key federal and state-level developments impacting project economics and eeded 40. Between April 2nd and May 12th 2025, actions by the Trump administration on tariffs significantly altered the effective costs of goods imported from China, including battery systems, cells, and components. Here's the rundown: As of March 22, 2025, BESS manufactured in China and shipped to the U. Under the Biden administration's Section 301. The new tariffs on batteries from China will increase costs for US BESS integrators by 11-16%, consultancy Clean Energy Associates said, adding that new guidance around the domestic content ITC adder will make it easier to access.