COMPANY PROFILE / NEXT-GEN ENERGY STORAGE
Alsym Energy
A privately held U.S. company that promotes non-lithium, non-flammable batteries. Its official materials now lead with sodium-ion "Na-Series" cells, after a water-based design
Alsym Energy comes up in discussions of next-generation storage because it is a U.S. start-up trying to sell sodium-ion batteries that it says do not go into thermal runaway to operators of stationary storage. In 2026 it announced partnerships with ESS Tech (8.5 GWh), Juniper Energy (500 MWh), ERITY (9 GWh) and Re:Build Manufacturing (cell manufacturing). These are all at the stage of letters of intent, MOUs, framework agreements or partnership announcements, and the company's goal of high-volume production by 2028 is a target. Drawing on the company's website and press releases, MIT News and announcements by public bodies such as the DOE, this profile sets out what can and cannot be confirmed. All performance figures are the company's own stated values, not third-party assessments.
- Alsym Energy in 30 seconds, and where it stands in next-generation storage
- The logo and how the name is written
- Where the company sits in next-generation storage
- Scale
- Resources committed to next-generation storage
- What it has done so far
- What comes next
- What the company is aiming for
- Partnership map
- Technologies, products and services
- The risks this company carries
- Glossary, references and claim-to-source audit
1. Alsym Energy in 30 seconds, and where it stands in next-generation storage
Massachusetts, U.S.Research, testing and cell design are based there, per the company
Cells & materials (secondary)Cell developer; plans to rely on partners for volume manufacturing
NFPP+ cathodeHard carbon anode, per the company. A different, water-based design until 2024
Alsym Energy is a privately held start-up that designs and develops cells, does not own a volume factory, and plans to rely on partners to build them Sourced. The figures it published in 2026 (8.5 GWh with ESS, 9 GWh with ERITY, 500 MWh with Juniper, and about 24 GWh that the company calls "customer commitments") are all numbers at the stage of a letter of intent, a framework agreement, an MOU or a partnership, not confirmed orders or shipments. In April the company said it would begin shipping cells and modules to strategic partners from the third quarter of 2026, but as of this writing (October 2026) we could not confirm from official materials whether shipments have started Not yet confirmed. Note also that until 2024 the company's public announcements concerned a different, water-based design called "Alsym Green"; since October 2025 what the company puts first is its sodium-ion battery, the "Na-Series".
2. The logo and how the name is written
A note on naming: the legal name is Alsym Energy Inc. (from the copyright line on its website), and the name is sometimes written with a trademark mark as "Alsym™". The current product is the Na-Series (sodium-ion batteries); the earlier product name was Alsym Green. "NFPP+" is the name its technology page gives to its cathode material. The logo image is the one published on the company's official website (alsym.com).
Official website: https://www.alsym.com/3. Where the company sits in next-generation storage
As Fig. 1 shows, Alsym's main position is on the "new chemistry" side. But it does not sell itself mainly on long duration: its official materials stress non-flammability (no thermal runaway), a wide operating temperature range, fast charge and discharge, and a supply chain of the United States and free-trade partners Sourced. The company says the cells suit short- to long-duration uses (in 2024, about the earlier product, it said discharge time could be set anywhere from 2 to 110 hours). Because it develops cells and sells them, it also has a "cells" side. See also our explainers on sodium-ion batteries and on hard carbon anodes.
4. Scale
The company is privately held, so financial figures such as revenue, profit and headcount are not published. What can be confirmed from official materials is set out below Sourced.
| Item | What we could confirm | Source |
|---|---|---|
| Founded | 2015 (per the June 2022 release) | Reference 11 |
| Capital raised | US$32 million as of June 2022. In April 2024, US$78 million (co-led by Tata Limited and General Catalyst, with Thrive Capital, Thomvest and existing investor Drads Capital taking part). We could not find any later round | References 10, 11 |
| Revenue and headcount | Not disclosed (the website gives no headcount) | References 2, 3 |
| Sites | Malden, Massachusetts (200 Exchange Street). A new site of about 60,000 square feet was shown in October 2024. Earlier, prototypes were built at a small facility in Woburn, Massachusetts (MIT News) | References 3, 12, 14 |
| Management | Mukesh Chatter (co-founder and CEO), Graeme Grant (COO), Michael Hannon (CFO), David Laughman (VP of R&D), plus heads of supply chain and of sales and business development. Co-founders include Professor Kripa Varanasi of MIT and Professor Nikhil Koratkar of Rensselaer Polytechnic Institute (RPI) | Reference 3 |
The "capital raised" above is money invested in the company, not revenue. The figures announced in 2026, such as "about 24 GWh", are customer commitments or partnership volumes in the company's words, and do not mean confirmed order value or revenue. We could not find in official materials whether these agreements are binding, or their prices and delivery dates Not yet confirmed.
5. Resources committed to next-generation storage
Because the company is private, most headcount, R&D and capital-spending figures are not disclosed. What official materials do show is organized below under four headings.
| Type of resource | What primary sources confirm | Status |
|---|---|---|
| People | The company says its Malden team covers scientific research, testing, engineering, computation and AI/ML, cell and module design, and quality (Reference 3). Headcount is not disclosed | Sourced / headcount not disclosed |
| Money | US$78 million raised in April 2024, to be used to grow the Boston-area team and expand prototyping and pilot lines (company statement). R&D spending and capital expenditure are not disclosed | Sourced / partly not disclosed |
| Investments, acquisitions, joint ventures, divestments | No record that Alsym has invested in or acquired another company, or formed a joint venture, in the official materials we checked. On the receiving side, its investors include Tata Limited and General Catalyst | Could not confirm |
| Partnerships (manufacturing, supply, deployment) | Re:Build Manufacturing (MOU on cell manufacturing, June 2026), ESS Tech (letter of intent for 8.5 GWh of cells and modules, April 2026), Juniper Energy (500 MWh deployment, May 2026), ERITY (9 GWh strategic relationship agreement, July 2026) | Sourced (none is a final contract) |
| Universities, research institutions, public funding | Co-founders hold posts at MIT (Professor Varanasi) and RPI (Professor Koratkar). DOE Storage Acceleration Voucher (August 2024; one of 12 selectees; 40 hours of national-laboratory expertise, using the high-precision materials characterization tool at the Stanford Synchrotron Radiation Lightsource, SSRL). Massachusetts MMAP: a US$200,000 grant in April 2025 | Sourced |
Next, the status of products and facilities. Stages are given in the company's own wording; no capacities are disclosed.
| Product / facility | Location | Scale | Stage | Date | Source |
|---|---|---|---|---|---|
| Na-Series cells and modules | — | Not disclosed | Announced. Shipments to strategic partners planned from Q3 2026 (company plan; no shipment confirmed) | 14 Oct 2025 / 27 Apr 2026 | References 4, 16 |
| Commercial-scale sodium-ion cell manufacturing capacity | New Kensington, Pennsylvania (Re:Build's existing facility) | Not disclosed | MOU stage: a statement of intent to develop it. No final investment decision found | 1 Jun 2026 | Reference 8 |
| R&D lab and future manufacturing area | Malden, Massachusetts | About 60,000 sq ft | Site visit held in October 2024 (the company presented "future manufacturing areas" as part of the tour). Whether manufacturing is running could not be confirmed | 30 Oct 2024 | Reference 14 |
| Prototypes of the earlier "Alsym Green" | Woburn, Massachusetts | Not disclosed | Prototype manufacturing (MIT News). Current status could not be confirmed | 21 Nov 2024 | Reference 12 |
6. What it has done so far
| When | What happened | Why it matters |
|---|---|---|
| 2015 | Founded (per the June 2022 release) | MIT News (2024) says the design then in use was settled in 2020 |
| 15 Jun 2022 | Emerged from stealth. The plan was non-flammable batteries without lithium or cobalt for EVs, stationary storage and marine use. It described a joint development effort with an India-based automaker that, if performance targets were met, would contract for at least 3 GWh a year (conditional) | EVs were a pillar at that time |
| 3 Apr 2024 | Raised US$78 million, co-led by Tata Limited and General Catalyst. The product then was "Alsym Green" for stationary storage | Funds went to expanding prototyping and pilot lines |
| Aug 2024 | Selected for the DOE Storage Acceleration Voucher (12 selectees) | Access to national-laboratory analysis tools |
| 30 Oct 2024 | Showed its new Malden site (about 60,000 sq ft) | R&D lab plus "future manufacturing areas" |
| 21 Nov 2024 | MIT News described the earlier design: a water-based electrolyte, one electrode mainly manganese oxide and the other mainly a metal oxide, and 1.7 MWh per 20-foot container | The company's own description of its design as of 2024 |
| 24 Apr 2025 | US$200,000 from the Massachusetts MMAP | A state programme that helps small and mid-sized manufacturers adopt new technology |
| 14 Oct 2025 | Announced the Na-Series (sodium-ion batteries) | Official messaging moves from Alsym Green to the Na-Series. We could not find the reason for the change or the current status of Alsym Green |
| 27 Apr 2026 | Described development on a physics-informed AI platform and reported safety tests (no thermal runaway in ARC up to 400°C; no rupture or fire in a nail-penetration test). Shipments planned from Q3 | The company's own test results. Test laboratory, standard and report not confirmed |
| 30 Apr 2026 | Signed a letter of intent with ESS Tech to add 8.5 GWh of sodium-ion cells and modules | Supports ESS's entry into short- and medium-duration storage |
| 12 May 2026 | Partnered with Juniper Energy to deploy 500 MWh, mainly in California | Starts with multi-megawatt deployments (company statement) |
| 1 Jun 2026 | Signed an MOU with Re:Build Manufacturing on developing cell manufacturing capacity in New Kensington | The idea is to manufacture at a partner's facility |
| 1 Jul 2026 | Signed a 9 GWh strategic relationship agreement with ERITY for mining. A framework for jointly finding and delivering projects | An agreement on a framework, not a confirmed purchase |
| 7 Oct 2026 | Named to Fast Company's Next Big Things in Tech 2026. Said it has about 24 GWh in customer commitments and targets high-volume production by 2028 | The company's wording, not a figure for confirmed orders |
7. What comes next
(July to September)Cells and modules to strategic partners. Not confirmed
PennsylvaniaRe:Build's existing facility. At the MOU stage
ERITY 9 GWh
Juniper 500 MWhLetter of intent, framework agreement, partnership. Not firm orders
The figures above are the company's targets and outlook, not results Not yet confirmed. The breakdown of the roughly 24 GWh of "customer commitments" (October 2026) and how binding the agreements are are not shown in official materials. Other plans in official materials include:
- ERITY: deploying sodium-ion batteries at existing and new mining projects of Volt Resources (ASX: VRC) and Resource Mineral International (Tanzania, Saudi Arabia, Finland and the United States)
- ESS: combining ESS's iron flow batteries (8 to 24 hours) with Alsym's sodium-ion batteries (short and medium duration) in one offering (ESS's description)
- Juniper: starting with deployments in California and then extending to Juniper's wider development pipeline
- Re:Build: building commercial-scale cell manufacturing capacity, aimed at manufacturing that qualifies for U.S. tax incentives (the Inflation Reduction Act's Section 45X advanced manufacturing production credit) (company statement; we have not checked the text of the law)
Cell production capacity (GWh a year) and start date / a final contract with Re:Build and the investment amount / whether shipments in Q3 2026 actually took place / the breakdown and binding nature of the roughly 24 GWh / system pricing for the Na-Series / third-party test or certification reports such as UL 9540A / any funding raised after 2024 / the future of the earlier "Alsym Green". None appears in the official materials we checked.
8. What the company is aiming for in next-generation storage
This section separates what the company says directly from what we infer. Inference marks our own reading of primary information.
| What can be read | Primary information behind it | Status |
|---|---|---|
| The aim is to be a supplier of non-flammable storage cells that need no temperature-control hardware, to operators of stationary storage | The website stresses safety, no active cooling and −40 to 60°C; the ESS and Re:Build releases describe supplying cells to integrators and developers | Sourced (company statement) |
| Volume production will use a partner's facilities, not its own factory | The Re:Build MOU, and "high-volume production with strategic manufacturing partners" in the Fast Company release. No large factory of its own was found | Inference |
| The sales pitch rests on "U.S.-made, non-FEOC cells" and fit with tax incentives | The Re:Build, Juniper and ESS releases repeatedly cite a non-FEOC (no foreign entity of concern) supply chain and U.S. tax credits | Inference |
| It sees data centers and mining as lead markets | The home page puts data centers first, and the ERITY agreement names mining and mobile data centers | Sourced (company statement) / Inference |
| It is a company that switches chemistry as needed | The front of its materials moved from the water-based Alsym Green (2024) to the sodium-ion Na-Series (2025). MIT News quotes the founders describing a platform that can produce several chemistries | Inference |
The basis for reading "volume production will happen at a partner's facility" is the June 2026 MOU with Re:Build. The MOU says it will develop commercial-scale sodium-ion cell manufacturing capacity at an existing facility in New Kensington, and Re:Build describes itself as already skilled in battery pack and module assembly, with cell manufacturing as the next step Sourced. We found no statement that Alsym will build its own dedicated plant. But an MOU is not necessarily a legally binding final contract, and it gives no amount, capacity or start date. We read this as pointing to a light, partner-based manufacturing set-up, but since no final investment decision has been announced, the plan may change Not yet confirmed.
9. Partnership map for next-generation storage
The pattern in its partnerships is that it gives manufacturing (Re:Build), system packaging (ESS) and project development (Juniper, ERITY) to different companies Sourced. ESS Tech, a maker of iron flow batteries for long-duration storage, says it intends to add Alsym's cells to its portfolio and so enter short- and medium-duration storage. For every one of these partnerships we could not confirm a final contract or any deliveries from official materials. The ESS statement is a letter of intent, Re:Build's is an MOU, and ERITY's is a framework for jointly finding and delivering projects, as the documents themselves say.
10. Technologies, products and services
The product figures below are manufacturer's stated values from the company's technology page and similar sources. For most of them, whether they refer to a cell or a system, and the conditions (temperature, charge/discharge rate, depth of discharge), are not given. This article therefore does not compare them with other makers' products, does not rank them, and does not set figures of differing conditions side by side.
| Item | What the official materials state (manufacturer's stated value) | What we could not confirm |
|---|---|---|
| Chemistry and materials | Sodium-ion. The cathode is "NFPP+", the company's modified version of polyanionic NFPP; the anode is hard carbon; the current collectors are aluminum (technology page) | Electrolyte, separator and binder details; the composition of NFPP+ |
| Energy density | 250 Wh/L and 135 Wh/kg (technology page) | Whether this is cell or system level, and the test conditions |
| Cycle life | 15,000 cycles or 20 years (technology page). Press coverage of the October 2025 launch said "over 10,000 cycles"; we use the figure the company now publishes | Depth of discharge, temperature, rate and the definition of capacity retention |
| Round-trip efficiency | 97% (technology page). The October 2026 release says "above 97%" | Test conditions (rate, temperature) |
| Operating temperature | −40 to 60°C (technology page). The company says active cooling by HVAC is not needed | Measured life and power across this range |
| Charge/discharge rate | 2C / 2C (technology page). The Juniper release also speaks of 30-minute fast charging | Effect on life in continuous operation |
| Safety | In ARC testing, no thermal runaway from room temperature up to 400°C; in a nail-penetration test on fully charged cells, no rupture or fire (April 2026, the company's own tests). The technology page mentions "UL 9540A at the cell level" | The test laboratory, the version of the standard, and the reports; the scope and result of the UL 9540A testing |
| Shipping and storage | Can be shipped and stored at 0% state of charge (the company attributes this to its aluminum current collectors) | Actual shipping record and regulatory treatment |
| Earlier product "Alsym Green" | Water-based electrolyte; one electrode reported as mainly manganese oxide (MIT News, 2024). 1.7 MWh per 20-foot container (system level, a founder's statement) | Its current sales and development status |
As the reason for the NFPP cathode's stability, the company points to a three-dimensional crystal framework held together by strong covalent bonds and a volume change below 4% as sodium moves in and out (the company's claim; it says lithium-ion cathodes change by 6 to 10%) Sourced. Polyanionic (phosphate-type) cathodes generally hold their oxygen firmly in the framework and so tend not to release it when hot Not yet confirmed (a general statement, not a measurement on Alsym's cells), which would cut one of the main links in thermal runaway: oxygen from the cathode feeding a fire in the electrolyte. However, the range in which the company says its cells do not go into thermal runaway is limited to the tests it published (ARC up to 400°C, and nail penetration on fully charged cells). We could not find published fire tests at module or system level. Aluminum current collectors can also be used on both electrodes in sodium-ion cells, a general advantage (lithium-ion anodes need copper), and it underlies the claim about shipping at 0% charge Not yet confirmed (a general statement). The energy-density figure (250 Wh/L) comes without a statement of whether it is a cell or a system value, or of the conditions, so we do not set it beside figures for products of other chemistries. See our explainers on thermal runaway and battery safety, sodium-ion batteries, and electrolytes and separators.
The technology page also carries comparison tables against LFP and other chemistries (fire risk, toxic gas, the share of project cost taken by HVAC and fire protection, and so on). These are comparisons the company has arranged from its own viewpoint, and because we could not find the premises or sources behind them, we do not reproduce them here.
11. The risks this company carries
| Risk | Detail | Status |
|---|---|---|
| Volume manufacturing not yet in place | High-volume production is a target for 2028. With Re:Build there is only an MOU, with no capacity, investment amount or start date | Sourced |
| Agreements are not final contracts | A letter of intent with ESS, an MOU with Re:Build, a framework agreement with ERITY. The breakdown and binding nature of the roughly 24 GWh are not disclosed | Sourced |
| Hard to verify externally | Safety, life and efficiency figures are the company's own, and we could not find third-party test reports or the full conditions | Not yet confirmed |
| Change of chemistry | The front of the company's materials moved from the water-based Alsym Green (2024) to the sodium-ion Na-Series (2025). Official materials do not say which product each customer or partner agreement assumes | Sourced / Not yet confirmed |
| Funding | A privately held company; the latest round we could confirm is US$78 million in April 2024. We could not confirm how the funding needed to build up volume manufacturing will be provided | Not yet confirmed |
| Dependence on policy and supply chains | The sales pitch rests on "U.S.-made, non-FEOC" and fit with tax credits, so changes in law, tax rules or their interpretation affect the business (we have not checked the text of the law) | Inference |
| Competing chemistries | Competition from lithium iron phosphate (LFP), other sodium-ion batteries and other new chemistries. The company arranges its comparison with LFP from its own viewpoint | Inference |
This article is an overview of a company. It is not advice on battery safety or installation. Installing and operating a storage system follows the laws, standards and authorities of the relevant country or locality, and the manufacturer's instructions.
12. Glossary
- Sodium-ion battery
- A battery in which sodium ions, rather than lithium ions, move between the cathode and anode. Sodium resources are widely distributed.
- NFPP / NFPP+
- A polyanionic cathode, generally meaning sodium iron pyrophosphate phosphate (NFPP), and the name Alsym gives to its own modification of it (NFPP+). The composition of NFPP+ has not been published.
- Hard carbon
- A hard, disordered carbon material used as the anode in sodium-ion batteries.
- Thermal runaway
- A chain reaction of heat generation inside a battery that drives the temperature up sharply.
- ARC (accelerating rate calorimetry)
- A test that heats a battery under near-adiabatic conditions to find, for example, the temperature at which self-heating begins.
- UL 9540A
- A U.S. test method for evaluating how thermal runaway propagates in energy storage systems, with cell, module, unit and installation levels.
- FEOC
- Foreign entity of concern: a term used in U.S. tax-incentive requirements. The company promotes a supply chain that it says falls outside it.
- Section 45X
- The U.S. advanced manufacturing production credit, which covers domestic manufacture of items such as battery cells (company description).
- LOI / MOU / SRA
- Letter of intent / memorandum of understanding / strategic relationship agreement. None of these is necessarily a final sales contract.
- BESS
- Battery energy storage system.
13. References
- Alsym Energy Technology page, "Our Technology". Na-Series chemistry (NFPP+ cathode, hard carbon anode), stated performance figures (energy density, cycle life, efficiency, temperature range, charge/discharge rate), and storage and shipping at 0% state of charge. https://www.alsym.com/technology/
- Alsym Energy Company home page. Na-Series positioning, data-center messaging, newsroom listing (May to October 2026), address. https://www.alsym.com/
- Alsym Energy Company page, "About Us". Business description, Malden site, management team and co-founders. https://www.alsym.com/about/
- Alsym Energy Press release: Na-Series developed with a physics-informed AI platform (newsroom date 27 April 2026). Accelerating rate calorimetry (ARC) and nail-penetration results; shipments planned from the third quarter of 2026. https://www.alsym.com/alsym-energy-announces-na-series-battery-success-developed-with-physics-informed-ai-platform/
- Alsym Energy Press release: named to Fast Company's Next Big Things in Tech 2026 (7 October 2026). About 24 GWh of customer commitments, a goal of high-volume production by 2028, and a claimed 75% cut in operating costs. https://www.alsym.com/alsym-energy-named-fast-company-next-big-things-in-tech-2026/
- ESS Tech / Alsym Energy Joint release by ESS Tech, Inc. (NYSE: GWH) and Alsym (30 April 2026). A letter of intent to add 8.5 GWh of sodium-ion cells and modules to ESS's portfolio. https://www.alsym.com/ess-partners-with-alsym-energy-to-deliver-8-5-gwh-of-non-lithium-battery-energy-storage-solutions/
- Alsym Energy / Juniper Energy Press release: partnership to deploy 500 MWh of storage, mainly in California (12 May 2026). https://www.alsym.com/alsym-energy-juniper-energy-partner-on-non-flammable-sodium-ion-energy-storage/
- Alsym Energy / Re:Build Manufacturing Press release: memorandum of understanding (MOU) on commercial-scale sodium-ion cell manufacturing in the United States, at Re:Build's existing facility in New Kensington, Pennsylvania (newsroom date 1 June 2026). https://www.alsym.com/alsym-energy-and-rebuild-manufacturing-partner-to-scale-domesticsodium-ion-battery-cell-production/
- Alsym Energy / ERITY Press release: 9 GWh Strategic Relationship Agreement for the mining sector (1 July 2026). https://www.alsym.com/alsym-energy-and-erity-partner-to-deploy-non-flammable-sodium-ion-batteries-for-mining/
- Alsym Energy Press release: US$78 million funding round led by Tata Limited and General Catalyst (3 April 2024). The product at the time, "Alsym Green", and the stated use of funds. https://www.alsym.com/alsym-energy-announces-78m-funding-round-led-by-tata-limited-and-general-catalyst/
- Alsym Energy Press release: emergence from stealth (15 June 2022). Founding year (2015), US$32 million raised to that date, and the business plan at the time. https://www.alsym.com/alsym-energy-emerges-from-stealth-to-provide-low-cost-high-performance-rechargeable-batteries/
- MIT News "A nonflammable battery to power a safer, decarbonized future" (21 November 2024). Founding story, co-founders, and a description of the earlier water-based design. https://news.mit.edu/2024/alsym-nonflammable-battery-power-safer-decarbonized-future-1121
- U.S. Department of Energy (DOE), Office of Electricity "Storage Acceleration Voucher Selectees Unveiled at Energy Storage Grand Challenge" (9 August 2024). Twelve selectees; Alsym is paired with SSRL at SLAC. https://www.energy.gov/oe/articles/storage-acceleration-voucher-selectees-unveiled-energy-storage-grand-challenge
- Alsym Energy Press release: opening of the new Malden site of about 60,000 square feet (30 October 2024). https://www.alsym.com/alsym-energy-celebrates-new-headquarters-and-welcomes-yvonne-hao-ma-secretary-of-the-executive-office-of-economic-development/
- MassTech (Massachusetts Technology Collaborative) "Healey-Driscoll Administration Awards More Than $3.7 Million to 23 Massachusetts Manufacturing Companies" (24 April 2025). Alsym Energy of Malden is listed among the recipients of the Massachusetts Manufacturing Accelerate Program (MMAP), US$200,000. https://masstech.org/news/healey-driscoll-administration-awards-more-37-million-23-massachusetts-manufacturing-companies
- Alsym Energy Newsroom post announcing the Na-Series (posted 14 October 2025). The full text is a link to a Business Wire release, which could not be retrieved when this article was prepared. https://www.alsym.com/alsym-energy-announces-na-series-safe-high-performance-sodium-ion-batteries-for-energy-storage/
14. Claim-to-source audit
| Claim in the text | Status | Source |
|---|---|---|
| Legal name, Massachusetts site (Malden), privately held | Sourced | Reference 3 https://www.alsym.com/about/ Reference 2 https://www.alsym.com/ |
| Founding year (2015), US$32 million raised by June 2022, and the then-plan with an India-based automaker (conditional, at least 3 GWh a year) | Sourced | Reference 11 https://www.alsym.com/alsym-energy-emerges-from-stealth-to-provide-low-cost-high-performance-rechargeable-batteries/ |
| The US$78 million round of April 2024 (led by Tata Limited and General Catalyst; Thrive Capital, Thomvest and Drads Capital taking part) and its use | Sourced | Reference 10 https://www.alsym.com/alsym-energy-announces-78m-funding-round-led-by-tata-limited-and-general-catalyst/ |
| The 2024 design (water-based electrolyte, manganese-oxide-based electrode), 1.7 MWh per 20-foot container, the founding story and the co-founders (MIT, RPI) | Sourced | Reference 12 https://news.mit.edu/2024/alsym-nonflammable-battery-power-safer-decarbonized-future-1121 |
| Selection for the DOE Storage Acceleration Voucher (August 2024, one of 12, paired with SSRL at SLAC) | Sourced | Reference 13 https://www.energy.gov/oe/articles/storage-acceleration-voucher-selectees-unveiled-energy-storage-grand-challenge |
| The new Malden site (about 60,000 sq ft, October 2024) | Sourced | Reference 14 https://www.alsym.com/alsym-energy-celebrates-new-headquarters-and-welcomes-yvonne-hao-ma-secretary-of-the-executive-office-of-economic-development/ |
| The US$200,000 Massachusetts MMAP grant (24 April 2025) | Sourced | Reference 15 https://masstech.org/news/healey-driscoll-administration-awards-more-37-million-23-massachusetts-manufacturing-companies |
| Announcement date of the Na-Series (14 October 2025); the Business Wire text was not retrieved | Sourced | Reference 16 https://www.alsym.com/alsym-energy-announces-na-series-safe-high-performance-sodium-ion-batteries-for-energy-storage/ (only the posting date was confirmed) |
| Na-Series chemistry (NFPP+ cathode, hard carbon anode, aluminum collectors) and stated values (250 Wh/L and 135 Wh/kg, 15,000 cycles, 97%, -40 to 60 C, 2C / 2C, shipping at 0% charge) | Sourced | Reference 1 https://www.alsym.com/technology/ (manufacturer's stated values; conditions not given) |
| ARC test (no thermal runaway up to 400 C), nail-penetration test (fully charged cell, no rupture or fire), planned shipments from Q3 2026, the AI platform | Sourced | Reference 4 https://www.alsym.com/alsym-energy-announces-na-series-battery-success-developed-with-physics-informed-ai-platform/ (company tests and plans) |
| About 24 GWh of customer commitments, the goal of high-volume production by 2028, and the claimed 75% cut in operating costs (company claims) | Sourced | Reference 5 https://www.alsym.com/alsym-energy-named-fast-company-next-big-things-in-tech-2026/ (company claims and targets) |
| Letter of intent with ESS Tech for 8.5 GWh of cells and modules (30 April 2026) | Sourced | Reference 6 https://www.alsym.com/ess-partners-with-alsym-energy-to-deliver-8-5-gwh-of-non-lithium-battery-energy-storage-solutions/ |
| Juniper Energy partnership for 500 MWh (mainly California, starting at multi-megawatt scale) | Sourced | Reference 7 https://www.alsym.com/alsym-energy-juniper-energy-partner-on-non-flammable-sodium-ion-energy-storage/ |
| MOU with Re:Build Manufacturing (cell manufacturing capacity at an existing facility in New Kensington, non-FEOC, Section 45X) | Sourced | Reference 8 https://www.alsym.com/alsym-energy-and-rebuild-manufacturing-partner-to-scale-domesticsodium-ion-battery-cell-production/ |
| The 9 GWh strategic relationship agreement with ERITY (mining; a framework) | Sourced | Reference 9 https://www.alsym.com/alsym-energy-and-erity-partner-to-deploy-non-flammable-sodium-ion-batteries-for-mining/ |
| Names and titles of management and co-founders | Sourced | Reference 3 https://www.alsym.com/about/ |
| Classification of Alsym (long-duration and new chemistries as main, cells as secondary) | Our calculation | our own grouping, based on the website and the 2026 releases |
| Headcount, revenue, R&D spending, capital expenditure, cell production capacity, the breakdown and binding nature of the 24 GWh, third-party test reports | Not yet confirmed | Not in the official materials we checked; this article does not estimate them (items we could not confirm) |
| Investments, acquisitions or joint ventures by Alsym | Not yet confirmed | Not in the official materials we checked; this article does not claim that none exist (limit of our check) |
| Whether shipments in Q3 2026 actually began | Not yet confirmed | Not confirmed from official materials; this is a company plan, not a result (outlook) |
| Reading that volume production will be at a partner's facility | Inference | Reference 8 https://www.alsym.com/alsym-energy-and-rebuild-manufacturing-partner-to-scale-domesticsodium-ion-battery-cell-production/ our interpretation of the MOU |
| Reading that the sales pitch rests on U.S.-made, non-FEOC cells and tax-credit fit | Inference | Reference 8 https://www.alsym.com/alsym-energy-and-rebuild-manufacturing-partner-to-scale-domesticsodium-ion-battery-cell-production/ Reference 7 https://www.alsym.com/alsym-energy-juniper-energy-partner-on-non-flammable-sodium-ion-energy-storage/ our interpretation of the releases |
| Reading that it switches chemistry as needed and sees data centers and mining as lead markets | Inference | Reference 2 https://www.alsym.com/ Reference 12 https://news.mit.edu/2024/alsym-nonflammable-battery-power-safer-decarbonized-future-1121 our interpretation |
| General statements on NFPP stability (polyanionic cathodes tend not to release oxygen; the advantage of aluminum collectors) | Not yet confirmed | our own explanation (general statement, not a measurement on Alsym cells) |
Last updated: 10 October 2026 / Troy Technical
This article draws on Alsym Energy's website and official press releases, MIT News, and announcements by the U.S. Department of Energy (DOE) and MassTech. Market-research estimates and press-report-only figures are not used. The performance figures are the company's stated values; most come without conditions, and we have not found third-party verification. Passages marked "Inference" are our own reading of primary information and are not statements by the company.