Susan Preston, California Clean Energy

Susan Preston, General Partner of the California Clean Energy Angel Fund. See sector focus and contact routes.

About Susan Preston

Susan Preston, General Partner of the California Clean Energy Angel Fund, invests in **seed and early-stage** clean energy companies, with typical check sizes of **$300,000–$500,000** per round[1][6]. Her portfolio includes notable startups such as **Alphabet Energy** (waste heat recovery), **REEL Solar** (solar cell manufacturing), **Lumetric Lighting**, and **Allopartis Biotechnologies**, reflecting a thesis focused on **capital-efficient technologies** in solar, energy efficiency, transportation, and lighting[1][2]. Preston specifically targets the funding gap between founder capital and traditional venture capital to foster innovation in renewable energy and energy efficiency sectors[1][3].

Susan Preston at a glance

Role
General Partner
Organization
California Clean Energy Angel Fund
Location
San Francisco, CA
Investor type
Venture Capital
Focus areas
Early Stage VC, Later Stage VC, Seed Round

Frequently asked about Susan Preston

What does Susan Preston invest in?
Susan Preston at California Clean Energy Angel Fund (San Francisco, CA) — sector focus: Early Stage VC, Later Stage VC, Seed Round.
How do I contact Susan Preston?
Susan Preston's published profile links (website, LinkedIn or X where available) are listed on the StartupFundraising.com investor profile.
Where is Susan Preston based?
Susan Preston is based in San Francisco, CA.

Every field above is read from the StartupFundraising investor directory — disclosed location, recorded investments and stated focus — and re-checked as filings arrive. Founders pair it with investors in San Francisco when building a target list.

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