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Sizable Energy raises $8 million in a funding round led by Playground Global to enhance its ocean-based energy storage solution for commercial deployment.

PRIVATEOct 22, 2025

Amount Raised

$8 Million

Round Type

Funding Round

San FranciscoEnergyRenewable Energy

Investors

Playground Global

Description

Sizable Energy has secured $8 million to expedite the commercial deployment of its innovative offshore pumped hydro system. The funding round was led by Playground Global. With successful tests confirming reliability in harsh ocean environments, the company is moving forward with new sea trials. This investment will help Sizable Energy deliver low-cost, long-duration energy storage solutions.

Quick answer

Sizable Energy raised $8 Million in a Funding Round round, dated October 22, 2025. Investors: Playground Global. Sizable Energy is based in San Francisco, California, United States.

How much did Sizable Energy raise?
Sizable Energy raised $8 Million in a Funding Round round on October 22, 2025.
Who invested in Sizable Energy?
Playground Global is named as investors in this round.
What does Sizable Energy do?
Sizable Energy addresses the critical need for secure, affordable, and sustainable energy storage.
Where is Sizable Energy based and how big is it?
Sizable Energy is based in San Francisco, California, United States. Fundz records about 10 employees.
Who are the decision-makers at Sizable Energy?
Fundz holds 1 contact at Sizable Energy. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Energy and Renewable Energy around the same time

Companies in the same sectors as Sizable Energy that raised within 45 days of this round, from Fundz verified event records.

  • Helical Fusion raised $5.5M (Series A) on December 5, 2025.
  • Feasibly raised $266K (Pre-Seed) on December 4, 2025.
  • Spark Cleantech raised $35M (Series A) on December 4, 2025.
  • pH7 Technologies raised $26M (Series B) on December 4, 2025.
  • Ecair raised $13M (Funding Round) on December 3, 2025.
  • Hachiko raised $2.5M (Seed) on December 3, 2025.

Who to call at Sizable Energy, and when

A new round usually means Sizable Energy is about to hire and buy. The teams that reach out first get the meeting.

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  • Who you already know at Sizable Energy, from your own LinkedIn network

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Company Information

Company

Sizable Energy

Location

2261 MARKET STREET

San Francisco, California, United States

About

Sizable Energy addresses the critical need for secure, affordable, and sustainable energy storage. Sizable Energy patented technology and straightforward design extends pumped hydro deployment to any offshore location with a depth of at least a few hundred meters. By leveraging a novel, modular, and easily deployable method, we utilize the gravitational potential of a solution 20% heavier than seawater, like saturated sea salt brine, within seawater.

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Related People

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Sizable Energy raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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