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Silicon Joule

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Develops batteries that offers a lower-cost, safer, greener alternative to traditional lithium-ion

Santa Clara, United StatesFounded 2011Transportation
Valuation $50–100M Last recorded · 2021
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Silicon Joule and the history behind them.

About Silicon Joule

Gridtential is a startup that operates in the renewable energy storage market, focusing on the development of advanced battery technology. The company's primary product is the Silicon Joule battery, a high-power energy source that is safer, more cost-effective, and more efficient than traditional lithium-ion batteries. This technology is designed to address the growing need for energy storage solutions in a world increasingly reliant on renewable energy sources for personal mobility vehicles, homes, and offices.

The Silicon Joule battery is a result of Gridtential's innovative approach to energy storage. By altering the material and architecture of a lead battery, the company has created a product that offers higher power density than any other battery currently available. The Silicon Joule battery is also lighter and more powerful than lead batteries, with up to 4 times longer life, up to 5 times dynamic charge acceptance, and up to 35% less weight.

Gridtential's business model is centered on the production of these batteries using existing factory equipment, which reduces the need for significant capital investment in new manufacturing facilities. This approach allows the company to produce Silicon Joule batteries at a lower cost than other battery technologies, making them a more affordable option for consumers.

The company's target market includes manufacturers of personal mobility vehicles, residential and commercial property owners, and renewable energy providers. By offering a safer, more efficient, and more cost-effective energy storage solution, Gridtential is well-positioned to capture a significant share of the growing renewable energy storage market.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2011
Headquarters
Santa Clara, United States
Employees
15
Open positions
None listed
Dealroom signal
40.2/100
Sub-industry
Clean Energy, Energy Storage, Vehicle Production
Sector
Transportation, Battery, Spinout, Sustainable Development Goals, EV Battery Other Chemistry, EV Battery, Climate Tech
Technology
Hardware, Deep Tech, Nanotech
Business model
Manufacturing
Client focus
b2b

Funding history

5 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
LATE VC✓Equity / VC Apr 2021 $12M $48M The Roda Group · David Marquardt · East Penn Manufacturing Co · Silicon Valley Bank —
SERIES B✓Equity / VC Sep 2017 $11M $44M East Penn Manufacturing Co · 1955 Capital · The Roda Group —
Showing the latest 2 of 5 recorded eventsBook a demo for the full funding history →

Growth signals

Silicon Joule website traffic

Latest recorded traffic for Silicon Joule is 1.4K monthly website visits, up 6900% over the last three months. Silicon Joule's team declined 11.8% over the past year.

Latest monthly visits1.4K 3-month web change+6900% 1-year team growth-11.8%
Summary metrics are public; monthly history is available with a demoCompare with peers →

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Closest operating peers by Dealroom taxonomy

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Zeta EnergyDevelops and commercializes safe rechargeable batteries that are higher performing, lower cost and sustainably manufactured Houston, United States Operational
SES AIIntroducing the most mature, practical, and independently validated Li-Metal battery for electric vehicles (EVs) Woburn, United States Operational
Nanotech EnergyWorld's top supplier of graphene, graphene oxide and graphene supper batteries Sunny Isles Beach, United States Operational
Pure LithiumPure Lithium is sustainably commercializing lithium metal negative electrodes for the next-generation of batteries Boston, United States Operational
NanoGrafNanoGraf Corporation is an advanced materials company developing silicon-graphene materials for the next generation of lithium-ion batteries Chicago, United States Acquired
Showing 8 of the closest matchesCompare every metric →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

9 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed1 investor entered at this stage

  • The Roda Group

Series A3 investors entered at this stage

  • East Penn
  • 1955 Capital
  • East Penn Manufacturing Co

Series B and later3 investors entered at this stage

Other known investors2 additional known investors

  • Santa Clara University
  • BioCube
Team profiled 8 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 2 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
2 countries with
team presence
🇺🇸 United States86.7%
🇮🇳 India6.7%
2 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Silicon Joule on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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