SK On and the other big Korean battery manufacturer, Samsung SDI, are next up, with Samsung SDI making prismatic-form-factor LFP cells, Intertek CEA said, as developers scramble to meet new investment tax credit (ITC) restrictions on the use of imported cells from China, reduce import tariff exposure and to capture the upside of domestic content bonuses.
Because of its established footprint of supplying lithium-ion (Li-ion) batteries for other applications, most prominently EVs, to the US market, like LG ES and Samsung SDI, SK On has gigawatt-hours of production lines that can be repurposed to make LFP cells for battery energy storage system (BESS) customers.
The South Korean company, part of the SK Group conglomerate, also manufactures, integrates, and markets its own range of BESS. Its newest, the Gen2 GridOn BESS, debuted in the US this summer, offering 4.5MWh – 5.7MWh usable energy storage capacity in 1-hour, 2-hour and 4-hour configurations.
SK On signed a contract in September 2025 to supply 7.2GWh of its DC block-based systems to project developer Flatiron Energy, equipped with cells manufactured by SK Battery America (SKBA), its wholly owned subsidiary in Commerce, Georgia, a state fast becoming synonymous with US battery manufacturing.
