Established Manufacturing Footprint, New Technology: SK On’s US BESS Market Strategy

Why It Matters

By converting its EV‑battery footprint to LFP storage, SK On can quickly scale U.S. BESS capacity, giving customers higher‑density, safer solutions while strengthening the domestic supply chain.

Key Takeaways

• SK On uses US EV plants to make LFP storage cells
• Gen2 Grid On BESS adds 20% higher energy density and early‑detection safety
• New coolant submersion system provides rapid thermal event protection
• 5 MWh ISO container solution offers 1‑, 2‑, 4‑hour configurations
• SK On plans to double US energy‑storage team within six months

Pulse Analysis

The United States is on the cusp of a battery‑cell manufacturing boom, with analysts projecting nearly 180 GWh of LFP output by 2028. This surge is driven by policy incentives, corporate data‑centre needs, and a shift away from nickel‑cobalt chemistries. SK On’s decision to repurpose its Georgia and Tennessee EV factories for storage cells positions it to capture a sizable slice of this growth, especially as developers like Flatiron Energy already contract for multi‑gigawatt projects. The domestic supply chain reduces lead times and mitigates geopolitical risks, giving U.S. utilities a more reliable path to large‑scale storage.

Technically, the Gen2 Grid On platform distinguishes itself with three core innovations. First, an electrochemical impedance spectroscopy (EIS) sensor linked to the BMS can flag anomalies up to half an hour before conventional systems, enabling pre‑emptive shutdowns. Second, a coolant submersion module instantly quenches thermal excursions, a feature rarely seen in commercial BESS. Finally, the system’s discharge rate is programmable up to 1 C, making it adaptable for renewable smoothing, industrial load shifting, or high‑intensity data‑centre loads. Packaged in a 20‑foot ISO container with 5 MWh capacity, the solution can be deployed in 1‑, 2‑ or 4‑hour configurations, offering developers modular flexibility.

Competitive pressure is intensifying as LG Energy Solution, Samsung SDI, Tesla and newcomers like Ford Energy expand U.S. LFP capacity. SK On’s advantage lies in its integrated approach—leveraging existing EV lines, accelerating team growth, and offering a globally scalable product. If the company can align its Tennessee plant’s 2028 startup with market demand, it could become a cornerstone supplier for both utility‑scale storage and emerging data‑centre applications, reinforcing the broader trend toward a domestically sourced, resilient energy‑storage ecosystem.