XL BATTERIES INC
Long-duration energy storage batteries with novel chemistry or architecture for grid-scale applications
- Sector
- Energy
- Headquarters
- Brooklyn, NY
- Founded
- 2019
- Latest Form D
- $7.5M, Aug 2025
- Total capital
- $21.7M
- Federal grants
- $1.2M
- 2 awards · 2020–2023
- Rank in peer group#38 of 53
- Private capital raised
- $20.5M
- 3 Form D · last Aug 2025
- 14 months since last filing
- Federal contracts
- None on recordNo federal contract awards found.
- Granted patents
- 0
- 9 pending
Capital timeline
Latest events
- Private capital raisedForm D · SEC · 3rd filing$7.5M
- Private capital raisedForm D · SEC · 2nd filing$5M
- Federal grantNSF · Phase II · SBIR Phase II:Development of a Flow Battery Using Common Materials and Proprietary Electrolytes$997K
- Private capital raisedForm D · SEC · 1st filing$8M
- Federal grantNSF · Phase I · SBIR Phase I: Viability of Low-Cost Cell Components for XL Batteries' Mild Aqueous Flow Battery$224K
Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.
Federal first
27months
from XL BATTERIES INC’s first federal award to its first private round.
- First federal award · Jun 2020
- NSF · $224K
- First Form D · Sep 2022
- $8M · 1st Form D
- Awards before first raise
- 1 award
An association in public records, not a cause or a prediction.
Standing among 53 peers
Line = medianEnergy · Material
- Federal grantsBelow median
Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.
Founders and team
From SEC Form D filings- Colin NuckollsDirectorNamed in SEC Form D filings
- Jeffrey SchwarzDirectorNamed in SEC Form D filings
- Jeffrey SmithDirectorNamed in SEC Form D filings
- Saif QaziDirectorNamed in SEC Form D filings
- Thomas SistoExecutive Officer, DirectorNamed in SEC Form D filings
What it has protected
USPTO · 0 granted of 9- PendingBranched Molecules for Redox Flow BatteriesUSPTOApplication 18951491
- PendingSystems and Methods for Low-Cost Redox Flow BatteriesUSPTOApplication 18593796
- PendingMethods and Systems for Reducing Crossover in Redox Flow BatteriesUSPTOApplication 18593771
Show all 9 patent records
- Branched Molecules for Redox Flow BatteriesMay 22, 2025 · Application 18951491Pending
- Systems and Methods for Low-Cost Redox Flow BatteriesOct 3, 2024 · Application 18593796Pending
- Methods and Systems for Reducing Crossover in Redox Flow BatteriesSep 12, 2024 · Application 18593771Pending
- Branched Molecules for Redox Flow BatteriesApplication 63600534Pending
- Systems and Methods for Low-Cost Redox Flow BatteriesApplication 63488373Pending
- Branched Molecules For Redox Flow BatteriesApplication PCTUS2024056424Pending
- Methods and Systems for Reducing Crossover in Redox Flow BatteriesApplication 63488367Pending
- Methods And Systems For Reducing Crossover In Redox Flow BatteriesApplication PCTUS2024018221Pending
- Systems And Methods For Low-cost Redox Flow BatteriesApplication PCTUS2024018226Pending
Related companies, and why
- XL BATTERIES, INCShares a founder: Paul J Evans
- FlexEnergy, Inc.Similar federal contract value in Energy · null in contracts
- SMART HEAT CORPSimilar federal contract value in Energy · null in contracts
- KONTAK, LLCSimilar federal contract value in Energy · null in contracts
- VESICUS INC.Similar federal contract value in Energy · null in contracts
- Utility Innovation Holdings, Inc.Similar federal contract value in Energy · null in contracts
Regulatory activity · Energy
- Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
- Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
- List of Approved Spent Fuel Storage Casks: NAC International, Inc., MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 16 and 17 and Revisions to Amendment Nos. 0 Through 16Nuclear Regulatory Commission
- Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
- Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.
Sources
Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.
How to read this page
Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.
Data freshness
SEC Form D filings through . SBIR and STTR awards through .