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Altadena Energy & Solar Inc. - Profile & Reviews

Altadena Energy & Solar was founded by Hans Rosenberger out of a belief that good engineering and financing are important for the development of environmentally friendly solar energy systems and buildings. There is a strong demand for energy savings and ‘green power,’ but too few practitioners who understand both engineering and finance. Hans majored in Physics at Goshen College, and completed his Masters of Electrical Engineering at Penn State. He pursued a career in radiometry-based remote sensing at NASA’s Jet Propulsion Lab (JPL) in Pasadena, CA, where he was staff engineer for 5 years in ground- and air-based microwave systems. He left JPL to pursue further aspirations in business and completed his MBA at USC’s Marshall School of Business. During this time he pursued internships focusing on electrical efficiency and demand management for the frozen food warehouse industry in Delaware, and wind energy finance in Tehachapi, CA. After his MBA, he started a property partnership in Berlin, Germany, to test the theory that there was unmet demand for green-oriented real estate development. The real estate work led to the founding of Altadena Energy & Solar, and its partner firm in Germany, RSF Solar, with a focus on technically sophisticated solar and energy efficiency solutions for residential and commercial clients.

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  • "Highly Recommend Altadena Energy & Solar"

    "Highly Recommend Altadena Energy & Solar"

    Reviewed Jun 09, 2017

    It's been a year since Hans and his team from Altadena Energy & Solar installed a 3.3 kW system in our home. Many solar companies will not install smaller systems, but Hans made the experience painless and easy. So far, the panels have performed well, and we love seeing our electric meter run backwards, even when we're using the AC in the summer. I would highly recommend them!

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Altadena Energy & Solar Inc. specialize in custom energy management, solar integration and energy storage system to best fit your energy concept, building engineering and aesthetics. We offer wide range of high-quality solar products from different domestic and international manufacturers.From design to installation, from permitting to commissioning, we take care of every steps. As our valued customer, you are not just getting an energy system from us, but also a partnership in getting the most out of your energy resources and building a sustainable future. A solar energy system is a 20+ years investment, and you will benefit from our smart engineering, reliable
warranties and excellent services for many years to come. We are committed to be the local solar solution that you trust.

  • Installation
  • Solar Repair & Maintenance
  • Community Solar
  • Energy Efficiency
  • Solar Hot Water
  • Solar PV
  • Energy Storage

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Altadena Energy & Solar Inc. Headquarters

460 E Calaveras St
Altadena, CA
91001 United States

Workmanship Warranty

10 Years warranty covers: all electrical and mechanical labor and roof attachment (consequential damages to house not covered)


Business Incorporation: C3493692
Contractor: C46-979146


General Liabilities, Workers Comp

States served by Altadena Energy & Solar Inc.

  • California CA