FEBRUARY 14-16, 2023 | Long Beach, CA   Get Updates

Joshua Weiner

Joshua Weiner

CEO - SepiSolar


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.

All presentations by Joshua Weiner

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