The Great Battery Divide: U.S. LFP Detours to the Grid

IEA data reveals U.S. LFP battery deployment retreated in EVs but surged in grid storage as manufacturers retooled over 50 GWh of capacity

28 May 2026

The US battery market has divided sharply, as federal sourcing rules and trade tariffs alter the deployment of lithium iron phosphate (LFP) chemistry. Data from the International Energy Agency (IEA) reveals that while LFP use in domestic electric vehicles fell significantly last year, more than 50 gigawatt-hours of manufacturing capacity was redirected toward grid-scale energy storage.

Automakers have pulled back from LFP technology for passenger vehicles, turning instead to nickel-based alternatives with more established non-Chinese supply chains. This shift follows tighter domestic sourcing requirements tied to federal EV tax credits, alongside increased tariffs on imports from China, which continues to control the vast majority of midstream mineral processing.

Conversely, the market for stationary grid storage has expanded rapidly. US battery manufacturers, including Ford and South Korea's LG Energy Solution, have adjusted factory configurations to serve utility-scale power projects, renewable energy installations, and artificial intelligence data centres.

Cost structures explain this divergence. According to the IEA, LFP battery packs remained more than 40 per cent cheaper than nickel-manganese-cobalt alternatives on average last year. For electricity grid operators, this pricing advantage outweighs the lower energy density of LFP cells, particularly given their longer operational cycle life and thermal stability. Globally, LFP now accounts for more than 90 per cent of stationary storage installations.

Investment in domestic LFP production continues to grow, with more than $15 billion in manufacturing commitments announced across southeastern states since 2023. Nonetheless, US production costs remain approximately 44 per cent higher than those in China, a premium that federal subsidies under the Inflation Reduction Act narrow but have not fully erased.

Favourable broader market indicators support this industrial shift. Global battery storage capacity grew 40 per cent last year. In the US, project developers plan to add a record 86 gigawatts of new utility-scale generation, with energy storage comprising nearly 30 per cent of that total.

Moreover, the dual challenge of establishing secure supply chains for electric cars while satisfying the power sector’s demand for low-cost storage will frame upcoming federal energy policy. Resolving these conflicting industrial pressures remains a primary task for factory operations scaling up in Michigan, Tennessee, and Georgia.