XL Batteries

Marlborough, MA · Founded 2019 · Privately Held (backing)

Developer of batteries designed to reduce waste within the existing energy infrastructure and unlock the potential of renewables for a sustainable future. XL Batteries is based in Marlborough, MA and was founded in 2019. Its last reported valuation was $44 million in Feb 2023. It has raised $34.7 million across 3 recorded rounds; the latest was a $7.5 million early-stage round in Aug 2025.

Last reported valuation
$44.0M
Oct 2026
Priced at
—
Total raised
$34.7M
Last round
Early Stage VC
Aug 2025

Who backs XL Batteries?

16 investors
InvestorType
Plug and Play Tech Center—
US National Science FoundationOther
Third DerivativeOther
SIP Global Partners—
Xerox VenturesOther
Catalus Capital Management—
Chain Reaction Innovations—
Jeffrey Schwarz—
Joel Greenblatt—
Joules Accelerator—
+ 6 more investors · a free account shows the complete list
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XL Batteries investors

16 investors are on record for XL Batteries, including Plug and Play Tech Center, US National Science Foundation, Third Derivative and SIP Global Partners. The early-stage round in Aug 2025 drew 1 investor.

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