LG Energy Solution has assembled the most commercially legible battery energy storage supply chain in North America from the dissolution of three EV joint ventures. Spring Hill, Lansing, and NextStar Windsor each carry named customers, disclosed investment figures, confirmed chemistry conversions, and production timelines sourced to company announcements or verifiable trade reporting. No other post-JV-dissolution pivot has comparable observable evidence.
The commercial substance is well documented. The tax credit architecture that underwrites the economics, and whether it actually applies to the corporate structure LGES has built, remains unresolved from public sources.
Spring Hill, Tennessee
Spring Hill remains an Ultium Cells LLC joint venture with GM. LGES announced a conversion from NCMA EV pouch cells to LFP cells for energy storage, with $70 million in retooling investment and a Q2 2026 production target, as reported by Energy Storage News on March 18, 2026. An LGES spokesperson confirmed GM and LGES are "still working together" at the site.
Q2 2026 is now. No public confirmation that LFP cell production has commenced at Spring Hill has been issued as of June 8, 2026. The target date has arrived; the milestone has not been publicly marked.
Cells produced at Spring Hill will supply LGES Vertech for grid-scale and data center ESS applications. The DTE Energy contract announced May 27, 2026 (6 GWh, $1.6 billion, eight Michigan grid projects) references supply from LGES manufacturing facilities without specifying Spring Hill by name. DTE's own press release cites LGES's Holland, Michigan plant for economic impact figures.
Spring Hill's JV ownership structure is the critical distinction. The manufacturing taxpayer for any 45X cell production credit claim is the JV entity, not LGES alone. How credit allocation between GM and LGES operates within the JV, and whether the JV has filed or intends to file a Related Person Election for cells sold to LGES Vertech, is not addressed in any public filing.
Lansing, Michigan
GM announced a non-binding agreement to sell its Lansing stake in December 2024. The sale closed in May 2025. Trade reporting puts the price at $2.1 billion; no company filing reviewed in this analysis discloses the final closing price directly. LGES now has full ownership of a nearly completed facility. Multiple post-acquisition sources confirm nameplate capacity at 50 GWh/year, resolving an earlier discrepancy with a 41 GWh figure that appears to have been a construction-phase estimate.
LGES is converting part of Lansing to produce LFP prismatic cells under a $4.3 billion supply agreement with Tesla for Megapack 3, confirmed by the US Department of the Interior during the Indo-Pacific Energy Security Summit in March 2026. Production is expected in 2027. LGES's Q1 2026 earnings materials reference "Michigan ESS line expansion" contributing to PP&E increases and ramp-up costs, confirming equipment installation was underway but production had not commenced as of the April 30 earnings release.
Lansing is the cleanest case in this ecosystem: fully LGES-owned, named customer (Tesla), disclosed contract value, confirmed chemistry, and a production timeline consistent with observable capex spending. It is also the facility where the 45X related-party question is least complicated, because the manufacturing taxpayer and the parent of the downstream integrator (Vertech) are the same corporate family with no JV partner to complicate credit allocation.
NextStar, Windsor, Ontario
Stellantis sold its 49% stake to LGES on February 6, 2026. The consideration was $100. LGES held a grand opening on March 5, 2026, with Canadian federal and Ontario government officials reaffirming subsidy commitments. Up to C$16 billion was pledged across the full buildout, with at least C$530 million disbursed as of November 2025. No clawback was triggered by the ownership change.
NextStar began LFP cell production in November 2025 alongside its existing NMC line, producing over one million cells by the grand opening. The facility has hired approximately 1,300 workers toward a target of 2,500 at full operation. The $5 billion facility spans 4.23 million square feet.
No named ESS customers have been disclosed for NextStar-produced cells specifically. The DTE Energy announcement references "other US and Canadian facilities" without naming Windsor. As a Canadian facility, NextStar-produced cells are not eligible for the US 45X production credit, though they may qualify under Canada's clean technology manufacturing incentives. Whether NextStar's primary commercial role is overflow capacity for Vertech contracts without domestic content requirements, positioning for Canadian incentive programs, or both, remains unclear from public disclosures. Production is confirmed; commercial routing has not been disclosed.
Facility Summary
| Spring Hill, TN | Lansing, MI | NextStar, Windsor, ON | |
|---|---|---|---|
| Ownership | Ultium Cells JV (LGES + GM) | LGES (100%) | LGES (100%, post-Stellantis exit) |
| Chemistry | LFP (converting from NCMA) | LFP (converting from NCMA) | LFP + NMC (dual-line) |
| Investment | $70M retooling | ~$2.1B acquisition + conversion | $5B facility; C$530M+ subsidies disbursed |
| Capacity | Not publicly disclosed | 50 GWh nameplate | Not publicly disclosed for LFP line |
| Named customer | LGES Vertech (DTE contract) | Tesla (Megapack 3) | None disclosed |
| Production status | Q2 2026 target; unconfirmed | Expected 2027; equipment installing | LFP production began Nov 2025 |
| 45X eligibility | US-sited; JV complicates credit allocation | US-sited; cleanest credit pathway | Canadian; not 45X-eligible |
Vertech as the Integration Layer
LGES Vertech Inc. is the entity that converts LGES cell production into contracted commercial revenue. Established in 2022 through LGES's acquisition of NEC Energy Solutions, Vertech operates as a separately incorporated US subsidiary providing full energy storage system integration under what the company describes as a "one contact, one contract" model. In interviews, Vertech CEO Jaehong Park has stated:
"Vertech never has to worry about having sufficient cell supply."
While Vertech is not LGES's only customer, the named commercial pipeline is substantial:
| Customer | Volume | Value | Timeline | Source |
|---|---|---|---|---|
| DTE Energy | 6 GWh | $1.6B | Eight MI grid projects, deliveries over two years | LGES press release, May 27, 2026 |
| Terra-Gen | Up to 8 GWh | Not disclosed | 2026–2029 | Energy Storage News |
| Excelsior Energy Capital | 7.5 GWh | Not disclosed | First delivery Apr 2026; all projects meeting domestic content | LGES corporate |
| Qcells | 5 GWh | Not disclosed | Building on 4.8 GWh deal in 2024 | Energy Storage News |
Vertech plans to deliver 50 GWh of US projects in 2026. LGES reported a consolidated ESS order backlog of 140 GWh at end-2025, targeting 90 GWh of new orders in 2026, with more than 50 GWh of North American ESS production capacity planned by year-end.
The structure is commercially coherent: LGES manufactures cells, Vertech integrates them into BESS systems, Vertech sells completed systems to unrelated utility and developer customers. Every terminal sale in the named pipeline is to an unrelated party. DTE Energy committed $1.6 billion twelve days ago.
The 45X Credit Structure
Section 45X of the Internal Revenue Code provides a $35/kWh production credit for battery cells produced in the United States and sold to an "unrelated person." LGES sells cells to LGES Vertech. Vertech is LGES's subsidiary. The statutory text anticipated this.
Section 45X(a)(3)(B)(i) provides that at the taxpayer's election, "a sale of components by such taxpayer to a related person shall be deemed to have been made to an unrelated person." The IRS codified this as the Related Person Election (RPE) in final regulations published October 2024. The election is made annually on Form 7207. The related person must subsequently sell the integrated product to an unrelated party.
A second pathway exists under §45X(d)(4): a manufacturer is treated as having sold to an unrelated person if the component is integrated into another eligible component that is itself sold to an unrelated person. Under this pathway, the credit accrues in the year the downstream entity (Vertech) sells the finished system, not when the intercompany cell transfer occurs.
Both pathways appear to accommodate the LGES-to-Vertech-to-DTE structure. The terminal sale to an unrelated person is present. The regulatory architecture provides a route to the credit on its face. Three complications remain.
The disregarded entity threshold. Proposed regulations reference existing Treasury rules under which a transfer between two disregarded subsidiaries of a common parent is not a "sale" for federal income tax purposes. If LGES Vertech Inc. is treated as a disregarded entity of LGES's US parent, no taxable sale occurs when cells move from an LGES manufacturing affiliate to Vertech, and the credit would arise only when Vertech sells the integrated system to DTE. The "Inc." designation suggests separate corporate status, but Vertech's actual US federal tax classification is not disclosed in any public source. Whether LGES's US manufacturing entities and Vertech file a consolidated federal return is similarly undisclosed.
The Spring Hill JV. The manufacturing taxpayer claiming 45X at Spring Hill is Ultium Cells LLC, not LGES alone. How the JV handles RPE elections and credit allocation between GM and LGES is structurally distinct from the fully LGES-owned Lansing facility. No public filing addresses this.
The PFE/MACR overlay. IRS Notice 2026-15, released February 12, 2026, provides initial guidance on calculating the material assistance cost ratio (MACR) for determining whether a taxpayer received material assistance from a Prohibited Foreign Entity. For 45X battery components, the minimum non-PFE material threshold is 60% in 2026, rising to 85% by 2030. Notice 2026-15 expressly deferred guidance on PFE status determination, particularly the "effective control" analysis, and has not yet published the forthcoming safe harbor tables that would make the MACR framework fully operational. The publication deadline for those tables is the forcing function: taxpayers may rely on interim rules for 45X components "until the date that the forthcoming safe harbor tables are published." If the tables arrive by late 2026, the MACR becomes a binding compliance layer for tax year 2026 claims. If they don't, the interim regime persists, and the compliance question remains partially deferred.
To be precise: Notice 2026-15 governs PFE material assistance calculations. It does not govern the related-party/RPE rules, which were finalized in October 2024. These are independent compliance layers. A 45X claim for cells sold through the RPE pathway must satisfy both. For LFP cells specifically, the MACR calculation is narrower than for NMC: eliminating cobalt and nickel from the bill of materials removes two material inputs with concentrated PFE-linked supply chains. But lithium carbonate and graphite anode material remain, and both carry significant PFE sourcing exposure. The FEOC graphite exemption expires December 31, 2026, after which graphite sourcing becomes a binding constraint for any 45X-eligible LFP cell.
What Cannot Be Confirmed
No public registry of 45X credit claims exists. Individual facility-level claims appear only in company earnings or securities filings, if at all. LGES is listed on the Korea Exchange (KRX: 373220) and does not file US SEC disclosures directly.
LGES discloses a bundled "North America production incentive" in quarterly earnings. In Q1 2026, this was KRW 189.8 billion (approximately $137 million), down from KRW 332.8 billion in Q4 2025. Without the incentive, LGES's Q1 operating loss would have been approximately KRW 398 billion rather than the reported KRW 208 billion. No per-facility breakdown is provided. No disclosure identifies how much represents cell credits versus other eligible component credits, or whether any credits flow through the RPE structure for Vertech sales.
The internal tax structure between LGES Korea, its US manufacturing subsidiaries, and LGES Vertech Inc. is not addressed in any public source reviewed for this analysis.
The Load-Bearing Number
At $35/kWh, the 45X cell production credit is large relative to the cell manufacturer's cost structure. It is comparable to or exceeds the margin on LFP cells at current pricing, and represents roughly half to two-thirds of Chinese LFP cell spot prices. For a company posting an operating loss of KRW 208 billion in Q1 2026 even with KRW 190 billion in production incentives, the credit is existential. At 50 GWh of North American ESS capacity at full utilization, the annual credit value would be approximately $1.75 billion.
That figure is large enough to be structurally load-bearing for the entire BESS conversion strategy. The commercial pipeline supports it: 140 GWh backlog, named customers committing billions, production underway or imminent at three facilities. The regulatory pathways exist: the RPE election and the §45X(d)(4) deemed-sale provision were designed for vertically integrated supply chains. The DTE contract provides the terminal unrelated-party sale the statute requires.
From public sources, it cannot be confirmed whether the specific corporate and tax structure LGES has built satisfies the threshold requirements for those pathways to operate. The disregarded entity question, the JV credit allocation at Spring Hill, the PFE/MACR compliance for LFP cells using lithium and graphite sourced across LGES's global supply chain, and the still-unpublished safe harbor tables all occupy the space between regulatory text and implementation reality. The commercial map is fully legible. The policy architecture has gaps precisely where $1.75 billion per year either flows or doesn't.
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Spring Hill production confirmation: LGES targeted Q2 2026 for LFP cell production at the converted Ultium Tennessee facility, but no public milestone announcement has appeared as of June 8, and the DTE Energy contract names Holland rather than Spring Hill as the cell source.
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Safe harbor table publication: The IRS must publish forthcoming safe harbor tables to make the MACR framework fully operational for 45X battery component claims, and law firm analysis of Notice 2026-15 confirms the PFE status determination and "effective control" analysis remain deferred to future proposed regulations.
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FEOC graphite exemption expiry: The December 31, 2026 expiration of the graphite anode material exemption will make FEOC-compliant graphite sourcing a binding constraint for any 45X-eligible LFP cell, directly affecting LGES's MACR calculations across all three facilities.
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LGES Q2 2026 earnings disclosure: LGES's bundled "North America production incentive" fell from KRW 332.8 billion in Q4 2025 to KRW 189.8 billion in Q1 2026, and the next quarterly disclosure should reveal whether Spring Hill and Lansing ramp-up costs begin generating offsetting credit income.