Span is a rising smart panel company developing products to enable rapid adoption of renewable energy and deliver an intuitive interface for the home.

Span is advancing the future of distributed clean energy with a smart panel that delivers an intuitive interface to the home.

Span was founded in 2018 by Arch Rao. The company is headquartered in San Francisco, California.


The Span panel replaces the standard electrical panel, providing transformative transparency and control over energy use and enabling customers to easily adopt solar, storage, electric vehicles, and other clean energy technologies.


Span's smart panel provides monitoring and control for 32 circuits, all managed through a smartphone interface. When the power goes out, Span automatically islands the house and allows homeowners to select what parts of their homes they want to power, going far beyond existing solutions that are limited to covering just a few critical loads.


Span is backed by ArcTern Ventures, Capricorn Investment Group, Congruent Ventures, Energy Foundry, Hardware Club, Incite Ventures and others. The company raised $10.2M in a Series A round on May 12, 2020. This brings Span's total funding to $13.8M to date.



  • Year founded: 2018
  • Funding Info: $13.8M over 2 Rounds (Latest Funding Type: Series A)
  • Yearly Revenue: NA
  • Employee Size: 11-50
  • Business Valuation: NA
  • City/Town: San Francisco
  • State: California
  • Country: United States
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