Should You Buy InoBat Before the SPAC Merger Closes?
InoBat, a Slovakia-based battery storage and cell development company, is going public via merger with Cartesian Growth Corp II, which trades as REEUF today. The setup offers exposure to European grid storage and AI-data-center power resilience, but investors should watch valuation, redemptions, and dilution closely.
InoBat, a Slovakia-based battery storage and cell development company, is going public via merger with Cartesian Growth Corp II, which trades as REEUF today. The setup offers exposure to European grid storage and AI-data-center power resilience, but investors should watch valuation, redemptions, and dilution closely.
Deal at a Glance
SPAC partner: Cartesian Growth Corp II
SPAC ticker (trades now): REEUF
Expected post-merger ticker: INBT
Implied valuation: $1.265B EV
Expected close: late Q3 to Q4 2026
Est. first trading date: late Q3 to Q4 2026
Deal status: Announced
Source filing: SEC 425 (2026-07-27)
Company Overview
InoBat is a European battery energy storage systems manufacturer and cell development platform headquartered in Slovakia. In the deal materials, it says it designs, manufactures, and deploys utility-scale BESS through its BESSMONT product line, with production at its Voderady facility. It is also building a broader battery technology platform that includes lithium-ion, sodium-ion, and hybrid supercapacitor solutions.
The company says its Voderady site is a 2,000 m² BESS production facility that can scale to 5 GWh, and it says it has 875 MWh delivered or signed. InoBat is also developing a gigafactory joint venture with Gotion in Šurany, Slovakia, with 20 GWh of initial planned capacity and targeted start of production in 2027. Its target customers include utilities, grid operators, renewable developers, industrial operators, energy traders, AI data center developers/operators, and hyperscalers. The market backdrop is a European BESS buildout driven by electricity price volatility, renewable penetration, supportive policy, and the need for flexibility and revenue stacking.
The SPAC Deal
InoBat agreed to merge with Cartesian Growth Corp II in a transaction that values the target at $1.265 billion on a pre-money, pre-merger basis, including consideration tied to strategic and financial milestones and earnouts. That is a meaningful valuation for a company still scaling manufacturing and commercial execution, so shareholders should compare the price tag against the current operating footprint, signed volume, and the pace of the 2027 gigafactory plan.
The SPAC trust held $37,914,438 as of December 31, 2025, and Cartesian II had only $162,853 of cash outside the trust at year-end 2025. The deal includes $77.5 million of committed PIPE financing and no minimum-cash condition, which makes redemption risk especially important: public shareholders can still pull trust cash, and the filings explicitly flag redemptions as a risk to proceeds. Dilution is also real. The sponsor owns 5,649,999 Class A shares and 1 Class B share, plus 6,600,000 private placement warrants; Cartesian II’s IPO sold 23,000,000 units and 8,900,000 private placement warrants, and public warrants are exercisable at $11.50 with redemption possible at $0.01 if the stock trades at $18.00 for the required period. The company can also convert up to $1.5 million of working-capital loans into warrants. The current SPAC ticker is REEUF, and the combined company is expected to trade on Nasdaq under INBT. The deal was definitively signed July 24, 2026, the F-4 was filed September 24, 2026, and the registration statement is not yet effective. If approval and SEC effectiveness come through, the first trading window is likely shortly after effectiveness, in late Q3 to Q4 2026.
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The merger gives InoBat access to capital for manufacturing scale-up, commercial expansion, and the Šurany gigafactory buildout without waiting for a traditional IPO process. The PIPE and trust cash are meant to support the next phase of growth, while the public listing can also broaden the company’s investor base and currency for future partnerships.
A SPAC route also lets management present forward projections in the deal materials, which is a key difference versus a standard IPO. That matters here because the story is less about current scale and more about execution: converting signed BESS volume into repeatable production, expanding capacity, and proving the economics of a European battery platform.
Financial Highlights
From the proxy summary, InoBat reported approximately €32.6 million of revenue and other income in 2025 and a net loss of approximately €17.5 million. The company says about 64% of 2025 revenue and other income came from two BESS customers, which shows there is already commercial traction but also a concentration issue that investors should not ignore.
The filings do not surface a clean cash balance in the accessible excerpts, but they do state there is going concern uncertainty absent the business combination and PIPE financing. Management materials describe InoBat as having a growing and profitable BESS business, but that is presentation language rather than a GAAP or IFRS line item. The deck also includes forecasts and projections, but those are forward-looking and should be treated as management’s scenario, not current results.
Risk Factors
The biggest de-SPAC-specific risk is cash leakage from redemptions. Cartesian II has no minimum-cash condition, so the deal can close even if a large share of the trust is redeemed, leaving less capital than investors may expect. The $77.5 million PIPE helps, but the filings still flag that PIPE financing could be reduced or fail to fully close.
Dilution is another major issue. The sponsor promote, private placement warrants, public warrants, and possible warrant conversion tied to working-capital loans all add to the share count over time. Beyond deal mechanics, InoBat still faces execution risk on manufacturing scale-up, supply-chain localization, and the sodium-ion roadmap, plus customer concentration since two BESS customers accounted for 64% of 2025 revenue and other income. If the merger does not close, the company’s filings say liquidity and going-concern risk remain material.
Comparable Public Companies
The closest public comps are grid-scale storage and energy-transition names. Fluence Energy (FLNC) is the cleanest operating peer for utility-scale battery systems, while Stem (STEM) is a useful comparison for storage software and optimization exposure. Both have traded as high-volatility energy-transition stocks, and the group has generally been sensitive to growth execution, margins, and funding conditions rather than just top-line expansion.
Other relevant public references include Tesla (TSLA) for battery ecosystem scale, though it is not a pure-play storage comp, and Enphase Energy (ENPH) for distributed energy and power electronics exposure, though its business mix is different. For retail investors, the key question is not just whether the sector is attractive, but whether InoBat can justify a $1.265 billion valuation with a smaller current revenue base and a capital-intensive buildout ahead.
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This is a classic de-SPAC setup where the headline story is bigger than the current operating scale. InoBat has real assets, a European manufacturing footprint, signed or delivered volume, and a credible market tailwind in grid storage and data-center resiliency, but the deal price, dilution stack, and redemption risk matter just as much as the growth narrative.
Shareholders should watch the SEC effectiveness process, any update on redemptions, and whether the PIPE remains intact at $77.5 million. If the transaction clears, the combined company should begin trading on Nasdaq as INBT shortly afterward, likely in late Q3 to Q4 2026. That timing matters because the market will quickly reprice the story based on how much cash actually comes through the door and whether InoBat can scale beyond a concentrated early customer base.
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