American Battery Factory Partners with Lion Energy to Build a US Battery Supply Chain From the Ground Up

The United States has spent years watching its battery supply chain develop overseas while domestic demand for energy storage accelerates. That dynamic is slowly, stubbornly changing — and the new partnership between American Battery Factory (ABF) and Lion Energy is one of the most substantive moves yet toward making US-made lithium iron phosphate cells a commercial reality.

This isn't a press release partnership. These two companies share founders, a common history, and now equity ties. Understanding what they're actually building together matters a great deal for anyone tracking where domestic battery manufacturing is headed.

Two Companies, One Origin Story

ABF wasn't born in a boardroom. It was incubated inside Lion Energy — the Utah-based solar and battery pack supplier — and formally launched in 2022 by Paul Charles alongside Lion Energy's co-founders. That institutional DNA shapes everything about how this deal should be read.

When a company takes an equity stake in a former subsidiary and formalizes an offtake relationship, that's not a partnership — it's a vertical integration strategy wearing partnership clothes.

The announcement this April confirmed that Lion Energy holds an equity position in ABF and is strategically aligned with ABF's initial production offtake agreements, which cover 1.1GWh of annual production capacity from new manufacturing lines. Those lines feed into ABF's recently announced 4.5GWh offtake agreements with what the company describes as "A-Rated" energy storage solution companies — a designation that matters when you're trying to close project financing, which ABF says it expects to finalize in the coming months.

The shared history also has operational weight. Back in 2022, then-CEO Charles told Energy-Storage.news that ABF could call on roughly 130 Lion Energy workers to support its own lean team. That kind of resource-sharing is what lets a startup move faster than its headcount would suggest.

What the Arizona Gigafactory Actually Represents

ABF broke ground on its $1.2 billion facility in Pima County, Arizona, in 2023. The plant will produce prismatic LFP battery cells — the chemistry increasingly preferred for grid-scale storage applications because of its thermal stability, long cycle life, and now-competitive cost curve compared to other lithium-ion chemistries.

Planned output sits at 5.5GWh for the first five years of production, with a longer-term roadmap to 15GWh as the facility scales. The site will also house ABF's R&D center and headquarters, which signals this isn't a contract manufacturing play — they're betting on owning the technology stack.

To put the scale in context: 5.5GWh of annual cell production, if fully deployed into four-hour storage systems, could support roughly 1.375GW of grid storage capacity per year — meaningful volume in a US market that installed about 10GW of battery storage in 2024 alone.

Lion Energy's integration role is specific and technically coherent: its proprietary hardware, firmware, and LionESS energy management system are designed to integrate directly with prismatic LFP cells — exactly what ABF will produce. Lion also announced it's expanding its US battery assembly capabilities, with new production lines expected online in June. Those systems are designed to be both Foreign Entity of Concern (FEOC) compliant and domestic content compliant — two regulatory hurdles that are increasingly make-or-break for projects seeking federal incentives under the Inflation Reduction Act.

Why FEOC Compliance Changes the Commercial Math

Here's the non-obvious angle most coverage glosses over: FEOC compliance isn't just a regulatory checkbox. It's becoming a genuine market access requirement for a growing portion of US energy storage procurement.

Utilities, independent power producers, and corporate buyers structuring long-term storage contracts are increasingly requiring FEOC-compliant equipment to qualify for IRA tax credits and to satisfy state-level procurement mandates. Chinese cell manufacturers — which still dominate global LFP supply — face mounting restrictions under these rules. That's not a headwind for ABF; it's their primary commercial opening.

The timing of Lion Energy's acquisition by Aqua Metals adds another layer of strategic logic. Aqua Metals has developed a novel lithium-ion battery recycling technology, which means this partnership now spans cell manufacturing (ABF), system integration and assembly (Lion Energy), and end-of-life recycling (Aqua Metals). A vertically integrated domestic battery ecosystem — cell to system to recycling — is exactly what the US market has been missing and what federal policy has been trying to incentivize. Whether it can be built at competitive cost is the harder question, but the structural pieces are being assembled deliberately.

The Pilot Line Precedent and What It Means for Execution Risk

Before Arizona comes online at scale, ABF has been doing something smart: running a pilot production line in China. Through its subsidiary ABF China, launched in partnership with KAN Battery, the company has been using a 1GWh factory to manufacture high-capacity prismatic LFP cells. The explicit purpose was to refine the design and construction approach for the Arizona facility.

That's meaningful from an execution risk standpoint. Gigafactory startups have a poor track record globally. The ones that have survived and scaled — whether in the EV or stationary storage space — almost universally had prior manufacturing experience to draw on. ABF's China pilot gives its team real production data before they're committed to a $1.2 billion domestic plant at full scale.

The original ABF vision, articulated by Charles in 2022, was a network of replicable, smaller-than-typical factories that could be deployed quickly and close to customers. That model hasn't been abandoned — it's just being de-risked through the Arizona anchor facility first.

What Investors and Developers Should Watch

For investors tracking domestic battery manufacturing, the next 12 months are the proving ground. ABF needs to finalize plant financing — something the 4.5GWh of offtake agreements was explicitly designed to support. Offtake from creditworthy counterparties is the lender's comfort blanket, and ABF has checked that box. The question is whether financing closes on timeline and whether Lion Energy's June production line launch delivers product that meets FEOC and domestic content standards under IRS scrutiny.

For energy storage developers and IPPs, the relevant question is pricing. US-made LFP cells will carry a cost premium over imported Chinese cells — at least initially. The IRA's domestic content bonus adder (worth an additional 10 percentage points on the investment tax credit) is designed to offset that premium, but developers need to run the math carefully on a project-by-project basis.

The partnership between ABF and Lion Energy isn't the end of US battery import dependence. But it's one of the most structurally coherent attempts to build domestic LFP manufacturing with real commercial offtake behind it — not just government grants and aspirational timelines. Watch the financing close date. That's the real signal.

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