Zelos Energy
Zelos Energy develops proprietary zinc-based rechargeable battery cells for stationary energy storage, serving data center backup, battery energy storage systems, and uninterruptible power supply markets through a contract manufacturing model.
- Company typePrivate
- Founded2003
- HeadquartersSan Leandro, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Zelos Energy does
Zelos Energy is a privately held developer of proprietary zinc-based rechargeable alkaline battery technology focused on stationary energy storage applications. The company produces 18670-format cylindrical cells and is developing prismatic-format cells, targeting battery backup units (BBU) for data centers, battery energy storage systems (BESS), and uninterruptible power supply (UPS) use cases. Its chemistry is positioned as a non-flammable, non-thermal-runaway alternative to lithium-ion, with cells classified as non-dangerous goods for shipping and described as UL 9540 certifiable.
The company operates through a contract manufacturing model, producing cells via third-party manufacturing partners rather than owning fabrication capacity. Pricing is quote-based and custom, indicating a B2B enterprise sales motion aimed at mission-critical industrial buyers in data center, grid-storage, and backup power segments. Zelos is founder-led, employs an estimated 1–10 people, and has raised limited disclosed capital, including a California Energy Commission grant of approximately $1.8M and prior seed funding.
The company's commercial posture is early-stage: cells have only recently entered production, no customers are publicly disclosed, and there is no open hiring. Its strategic emphasis is on safety, regulatory standing, and supply-chain cost advantages of zinc, rather than energy density leadership, positioning it as a complementary rather than direct substitute for incumbent lithium-ion stationary storage offerings.
Zelos Energy firmographics
Firmographics- Name
- Zelos Energy
- Legal name
- Zēlos Energy Ltd.
- Website
- https://zelos.energy
- Company type
- Private
- Founded year
- 2003
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Zelos Energy develops proprietary zinc-based rechargeable battery cells for stationary energy storage, serving data center backup, battery energy storage systems, and uninterruptible power supply markets through a contract manufacturing model.
- Ownership category
- akta.pro rank
Zelos Energy industry classification
Industry- Product category
- Battery cells and stationary energy storage systems
- NAICS
- Battery Manufacturing (33591), Battery Manufacturing (335910)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)
- akta.pro secondary industry
- Battery Pack Manufacturing & Module Assembly (EUAFABAI)
Keywords
Where Zelos Energy is headquartered
LocationHeadquarters
- HQ city
- San Leandro
- HQ country
- United States
- HQ region
- North America
Markets served
Zelos Energy business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Hardware sales — cylindrical and prismatic cells: Sale of 18670 cylindrical cells (in production) and prismatic cells (available in the relatively short term) as building blocks for battery packs and modules. Cylindrical cells described as 'ready for purchase in large quantities for immediate needs.'
- Custom-designed battery systems (BBU, BESS, UPS): Custom-designed prismatic batteries and integrated BBU modules tailored to client, user, and application requirements; revenue generated through custom quotes for mission-critical applications.
- Government grant funding (R&D): Non-dilutive grant funding from the California Energy Commission ($1.8M, 2020) to support R&D scale-up and commercial deployment of zinc-based technology.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | — | Custom quote-based pricing for cylindrical cells, prismatic cells, and BBU modules |
Go-to-market motion2 records
Zelos Energy product offering
Product offeringCore offering
Zēlos Energy develops and sells rechargeable zinc-based alkaline battery cells and modules for mission-critical stationary applications. Its 18670 cylindrical cells are in production and available for purchase in large quantities, prismatic formats are offered in the relatively short term, and the company provides custom-designed battery backup units (BBU), battery energy storage systems (BESS), and uninterruptible power supply (UPS) modules tailored to client, user, and application requirements.
Differentiator
Problem solved
Functional benefit
Products and services
- 18670 cylindrical zinc-based alkaline cells Rechargeable 18670 cylindrical-format zinc-based alkaline battery cells in production, sold as building blocks for industrial battery packs and modules in mission-critical stationary storage applications such as data center BBU, BESS, and UPS. Ready for purchase in large quantities for immediate needs and designed to be a safer, non-thermal-runaway, non-dangerous-goods alternative to lithium-ion cells.
- Prismatic zinc-based alkaline cells Rechargeable prismatic-format zinc-based alkaline battery cells offered in the relatively short term, providing a prismatic building block for industrial battery packs and modules in mission-critical stationary storage. Compatible with modern battery manufacturing techniques and equipment, and positioned as a safer, non-thermal-runaway, UL 9540 certifiable alternative to lithium-ion prismatic cells.
- Custom-designed BBU (Battery Backup Unit) modules Custom-designed prismatic batteries and integrated Battery Backup Unit (BBU) modules tailored to client, user, and application requirements, enabling optimized data center reliability. Sold under a custom-quote pricing model with technical specifications tailored to the application.
- Custom BESS (Battery Energy Storage System) solutions Custom-designed zinc-based Battery Energy Storage System (BESS) solutions for storing renewables to support 24/7 operations, built on Zēlos® cylindrical and prismatic cells. Marketed to industrial and infrastructure buyers seeking safer, non-thermal-runaway, UL 9540 certifiable stationary storage for renewable energy buffering.
- Custom UPS (Uninterruptible Power Supply) solutions Custom-designed zinc-based Uninterruptible Power Supply (UPS) solutions providing backup power for essential use cases. Built on Zēlos® cylindrical and prismatic cells and positioned as a safer, non-thermal-runaway, non-dangerous-goods alternative to lithium-ion UPS systems.
Companies that use Zelos Energy
Customer profileIdeal customer profiles1 record
Zelos Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Zelos Energy partnerships and signals
Strategic signalRecent moves6 records
Expansion highlights5 records
Zelos Energy competitors and assessment
Company assessmentDirect peers
- ZincFive: ZincFive manufactures nickel-zinc batteries specifically for UPS, data center, and mission-critical backup applications. Direct competitor to Zēlos in the UPS/BBU zinc-battery niche, with an overlapping focus on safer alternatives to lithium-ion in data center power.
- Salient Energy: Salient Energy developed zinc-ion battery technology for stationary storage as a safer, lower-cost alternative to lithium-ion. Direct chemistry peer to Zēlos' zinc-based stationary storage play, though at an earlier commercialization stage.
- Eos Energy Enterprises: Eos Energy Enterprises produces zinc-based (zinc-air) rechargeable batteries for utility-scale and industrial stationary storage. Direct competitor to Zēlos in the zinc-chemistry stationary storage category, targeting similar grid and behind-the-meter applications.
Broad incumbents
- Fluence Energy: Fluence Energy is a leading global integrator of grid-scale battery energy storage systems with deployments for utilities and large commercial customers. Broad incumbent in the stationary storage market that Zēlos could partner with or compete against as an upstream cell technology supplier.
- Tesla (Energy / Megapack): Tesla's energy business produces Megapack and Powerpack lithium-ion BESS solutions for utilities and commercial customers, including data center-adjacent applications. Broad incumbent that Zēlos competes against in the stationary storage market, but with a different (lithium-ion) chemistry.
Emerging players
- Form Energy: Form Energy is developing iron-air battery systems for multi-day stationary storage. Comparable to Zēlos as a non-lithium, abundant-materials chemistry pursuing large-scale stationary and grid applications with safety advantages.
- ESS Inc. ESS Inc. builds iron-flow batteries for long-duration stationary storage, marketed as a safe, non-flammable alternative to lithium-ion. Comparable to Zēlos as a non-lithium stationary storage alternative targeting utility and commercial customers with safety and ESG-driven value propositions.
- Ambri: Ambri is commercializing liquid-metal (antimony) battery technology for grid-scale storage. Comparable to Zēlos as a deep-tech alternative-chemistry stationary storage developer targeting utility and commercial deployments with safety and cost advantages.
- EnerVenue: EnerVenue produces nickel-hydrogen batteries for stationary storage, emphasizing long cycle life and safety. Comparable to Zēlos as an alternative-chemistry stationary storage company targeting the same data center, microgrid, and renewables customers.
- Natron Energy: Natron Energy manufactures sodium-ion batteries focused on data center backup, EV charging, and industrial power. Comparable to Zēlos as a non-lithium alternative-chemistry player specifically targeting the data center BBU market with safety and power-density advantages.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Zelos Energy social profiles
Digital presenceZelos Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Zelos Energy leadership team
Management profileNumber of profiles
Profiles4 records
Zelos Energy funding detail
Funding detailFunding overview
Funding rounds4 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Zelos Energy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Zelos Energy
What does Zelos Energy do?
Zēlos Energy develops and sells rechargeable zinc-based alkaline battery cells and modules for mission-critical stationary applications. Its 18670 cylindrical cells are in production and available for purchase in large quantities, prismatic formats are offered in the relatively short term, and the company provides custom-designed battery backup units (BBU), battery energy storage systems (BESS), and uninterruptible power supply (UPS) modules tailored to client, user, and application requirements.
Is Zelos Energy a public or private company?
Zelos Energy is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Zelos Energy founded?
Zelos Energy was founded in 2003. It employs 1 to 10 people.
Where is Zelos Energy based?
Zelos Energy is headquartered in San Leandro, United States, in the North America region.
How does Zelos Energy make money?
Three revenue lines are on record. Hardware sales — cylindrical and prismatic cells are the primary driver. The others are custom-designed battery systems (BBU, BESS, UPS) and government grant funding (R&D).
Who are Zelos Energy's main competitors?
Direct peers on record are ZincFive, Salient Energy and Eos Energy Enterprises. Broad incumbents are Fluence Energy and Tesla (Energy / Megapack). Emerging players are Form Energy, ESS Inc., Ambri, EnerVenue and Natron Energy.
Does Zelos Energy have an API?
No public API is recorded for Zelos Energy.
What industry is Zelos Energy in?
Zelos Energy's product category is Battery cells and stationary energy storage systems. Its primary akta.pro industry code is IMAGAHAA, Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH), with a secondary code of EUAFABAI, Battery Pack Manufacturing & Module Assembly. Its NAICS code is 33591 and its SIC code is 3600.