SepiPortal

Joshua Weiner

President & CEO

After completing his bachelor’s degree in astrophysics & astronomy from UC Berkeley, Josh began his solar career at Akeena Solar, one of the leading turnkey residential and commercial solar contractors from 2002 to 2009. Shortly after joining Akeena in 2005, he quickly took on a supervisory role within the company’s operations departments, opening several remote offices nationwide and scaling the company’s staffing and infrastructure needs upon Akeena’s IPO filing. Josh managed the engineering, drafting, and project management teams, supporting over 20 MW of residential and small commercial PV systems over a 3-year time period.

Josh’s teaching career began at UC Berkeley Extension, and he currently offers solar engineering training and educational resources through SepiSolar. He is an NABCEP-certified Solar PV installer and has extensive experience training and scaling project management and design teams within the solar PV industry.

Josh’s energy storage career began as a co-founder of Green Charge Networks, which was awarded a $10M grant by the U.S. DOE to deploy 8 micro-grid and utility-interactive solar-plus- energy storage-plus-electric vehicle chargers projects for the purposes of optimizing behind-the-meter electricity usage. After exiting Green Charge Networks (now owned by ENGIE) in 2015, Josh has gone on to develop grid-connected energy storage and micro-grid projects with NRG’s Station A team and NEXTracker’s integrated energy storage program, where he has played many roles in the development of energy storage products and services, including business, finance, policy, project, product, hardware, and software development.

Most recently, Josh was recognized by Renewable Energy World on its 40 Under 40 list.


Join the SepiSolar Team

We are always seeking results-oriented, passionate candidates who are genuinely interested in long-term, sustainable growth.

Join the SepiSolar Team

We are always seeking results-oriented, passionate candidates who are genuinely interested in long-term, sustainable growth.

View Our Current Openings

CA Small Business Enterprise

Certification ID:
2015743

Bidder/Supplier ID:
BID0068933

NAICS Codes:
541330 – Engineering services
541340 – Drafting services
541490 – Other specialized design services
541618 – Other management consulting services
541690 – Other scientific and technical consulting services
541990 – All other professional, scientific, and technical services

D-U-N-S number:
065817064
CAGE:
8F5K7

UNSPSC Code:
811024, 81101701, 81101516, 81101604, 43232614, 81101505


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