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.
His work included field engineering at communication ground stations in California and Spain and airborne experiment campaigns in Florida and Sweden. He left JPL to pursue further aspirations in business and completed his MBA at USC's Marshall School of Business.
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.
His work included field engineering at communication ground stations in California and Spain and airborne experiment campaigns in Florida and Sweden. He left JPL to pursue further aspirations in business and completed his MBA at USC's Marshall School of Business.
Services
Altadena Energy & Solar is a solar integrator that designs, installs and maintains solar electric and thermal system in the greater Los Angeles area since 2008. We are a licensed, bonded and insured contractor (CA License C46 #979146). We also specialize in custom energy management, solar integration and energy storage system to best fit your energy concept, building engineering and aesthetics.
From the sun to your outlet, photo-voltaic systems transform the sun's radiation directly into electricity that you use for your home appliances and electric car. The power generated by the sun keeps your house running as usual, and provides a relief from ever increasing electricity bills. If you lease a system, you pay a monthly bill for the solar power like you do to an electric company, only at a lower price per unit consumed.
Solar panels, or solar modules, can be installed on the roof or ground mounting system in your backyard (as space permits). Solar panels are made up of photovoltaic (PV) cells, which convert sunlight into direct current (DC) power, even on cloudy days! The direct current (DC) power is sent to the inverter, which converts it into alternating current (AC), used by the utility grid and your household appliances.
A solar power system costs about as much as buying a new car, but you are not getting rid of it every 8-10 years nor will it cost you a lot to maintain. A solar power system is for long-term investment of over 20 years, plus it increases your property value. Depending on your location, type of roofing, and design of your system, a typical home installation ranges from 3 to 12 kilowatts and costs between $18,000 to $60,000 to purchase.
For many non-profit organizations, the best way to go solar is through the Power Purchase Agreement (PPA). Altadena Energy & Solar will build, own and operate the solar system for your organization. Your organization will only pay us the energy used each month, just like how you pay your utility bill but at a discounted price.
Reviews (20)
Joshua Schpok
Nov 18, 2021
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We talked to about six solar installers before deciding on Altadena. From our first consultation, I was impressed they weren't just trying to make a sale, but were able to provide a fairly comprehensive technical analysis of our project, and recommend some alternative. Our work included upgrading our service panel and service drop point, and wiring conduit around to minimize aesthetic impact. I was impressed they painted conduit to match all the surfaces it ran along, including the roof.
We're glad we went with Altadena, even if some installers provided lower quotes. Compared to other proposals
We're glad we went with Altadena, even if some installers provided lower quotes. Compared to other proposals
James A.
Oct 19, 2021
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Mitchell Paik
Apr 15, 2021
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Positive: Professionalism, Quality, Responsiveness, Value
Altadena Energy and Solar is the BEST Solar company out there! Great pricing and adaptable to small and large jobs. Great on finding the perfect system to meet your needs. Appreciate your professionalism, years of experience and small business touch to create the perfect plan for me.
Altadena Energy and Solar is the BEST Solar company out there! Great pricing and adaptable to small and large jobs. Great on finding the perfect system to meet your needs. Appreciate your professionalism, years of experience and small business touch to create the perfect plan for me.
Kristen B.
Feb 27, 2021
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What a great experience working with Altedana Solar. I did a lot of research and couldn't decide what company to work with. Our neighbor recommended Altadena Solar and I am so grateful. From the minute we met Hans we knew we were in good hands. It's one of the best decisions we have made, both getting solar and doing it with Hans and Joy. We've had solar energy for a year now and we love it!
Judy D.
Jan 20, 2021
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Couldn't have been more helpful, professional and transparent during the design and building. All of the permits and approvals sailed through. Performance of our system has exceeded expectations. To top it off, I feel like we have a friendly expert on hand, not just for the solar but also for the car charger. So glad we didn't go with a "corporate" provider. Thank you , Hans and Joy!
Slidegrease
Jan 13, 2021
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Altadena Solar has installed for my solar panels, a car charger, and a battery back up system. All of them are working well. Additionally, Hans and his colleagues at Altadena Solar have done a wonderful job of working the process thru the county, will all permits and rebates approved and delivered as promised. Altadena Solar is, in my opinion, the Nordstroms of the solar industry. Their products, installation, and customer service are among the best I've ever encountered.
Ben J.
Oct 13, 2020
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Altadena Energy & Solar is fantastic. I started my work with them around May/June, and have my solar installed and operating about two months ago. From beginning to end, they took care of everything. Both Hans and Joy are very responsive and accommodating with my questions and suggestions. It is such a joy to get this done without any headache.
Zahi T.
Aug 12, 2020
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Their quote for a solar panel system was lower than a larger company and I appreciated their more straightforward explanations over the aggressive sales tactics of larger companies. I knew i had an issue with my meter access and their solution was very practical and low cost. The process took longer than I expected due to COVID-19 and the meter issue, but I can't fault them for that. Happy I was able to support a local small business and get the system I wanted.
Robert Berlin
Jul 25, 2020
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I shopped around to get quotes and become knowledgeable about solar for my home. Only Aladena Solar & Energy checked all the boxes. Professional. Excellent references. Offered several options and plans. Fully answered all my questions. Handled all the paperwork and permits. Excellent, courteous crew who showed up on time and were tidy and efficient. Joy, Hans, Bobby and the entire crew were wonderful to work with. They met and exceeded my expectations. I highly recommend.
Doug Calli
Jun 16, 2020
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The entire team at AE&S is the best I could have hoped for.
Every positive comment I see here is well earned, Hans, Joy, Bobby, Alex and Yaki, you guys are the best!
I had very specific design requests; Solar split over two buildings, garage re-roofing, conduit runs had to be through our attic or basement and underground, along with specific panels and components.
Out of 6 bids, many glossed over the details (leaving their bids suspect) or only used their designs and components.
Not only did AE&S do it exactly right, of the final contenders, theirs was the best price!
Every positive comment I see here is well earned, Hans, Joy, Bobby, Alex and Yaki, you guys are the best!
I had very specific design requests; Solar split over two buildings, garage re-roofing, conduit runs had to be through our attic or basement and underground, along with specific panels and components.
Out of 6 bids, many glossed over the details (leaving their bids suspect) or only used their designs and components.
Not only did AE&S do it exactly right, of the final contenders, theirs was the best price!
Victoria Forester
Dec 08, 2019
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I cannot recommend this company more highly! Organized, professional, excellent customer service and follow through. From start to finish this was one of the best companies we have ever worked with. Not only do I feel great about helping the environment by going solar but the process of doing so was a pleasure.
Ruth Landsberger
Nov 25, 2019
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Tod K.
Oct 10, 2019
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This is a great company. We've been running for two months now on a 21-panel residential install done by Altadena Energy & Solar. The entire install process took about a month from agreement to install to PWP permit. The panels work great, our electricity bill is almost nothing, and they have been very responsive to any questions we email them. We really like that they're a local business and close by. And also that they're willing to provide datasheets and hardware specs for all the equipment installed.
Mike W.
Aug 22, 2019
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We've been thinking about going solar for years and finally when we got tired of our escalating electric bills we decided to make the plunge. We, as everyone should, did our due diligence and got estimates from multiple companies. Joy from Altadena Energy & Solar was our initial contact and she proved to be extremely knowledgeable about the business. She listened to our needs and concerns and explained the process of generating solar power in a simple straight forward way. She gave us many options for a variety of panels / inverters and explained the differences in an easily understandable
Mandy B.
Jul 23, 2019
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Initially, I was prepared to go with a bigger company but after hearing about Altadena Energy & Solar, decided to chat with them first. I met with Joy and was impressed with her and Hans' genuine passion for the environment and solar energy. It really feels like they do this for the sole purpose of getting more people to go solar.
They're small but have been around for over ten years. Their experience and knowledge of the latest technology was apparent from the start. They're flexible and easy to work with, placating my indecisiveness with multiple estimates for different layout
They're small but have been around for over ten years. Their experience and knowledge of the latest technology was apparent from the start. They're flexible and easy to work with, placating my indecisiveness with multiple estimates for different layout
B. A.
Jul 18, 2019
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Not sure why these guys only have 4 reviews but from start to finish Hans and Joy were great to deal with.
From the initial consultation to the moment we switched the system on they were on top of it.
Like most everyone, we initially requested quotes from 4 companies (all 4.5-5 star on yelp).
Not only was Joy's initial consult the most thorough, explaining all of the various options but their quote was actually the least expensive. Our system is now on and producing great results! Blasting the A/C guilt free is priceless.
Don't select your solar installer solely based on the number
From the initial consultation to the moment we switched the system on they were on top of it.
Like most everyone, we initially requested quotes from 4 companies (all 4.5-5 star on yelp).
Not only was Joy's initial consult the most thorough, explaining all of the various options but their quote was actually the least expensive. Our system is now on and producing great results! Blasting the A/C guilt free is priceless.
Don't select your solar installer solely based on the number
Mik C.
Mar 23, 2019
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Hans and Joy are an absolute pleasure to work with. Hans did an extremely thorough job making sure I understood every aspect of the quote and proposal that they put together and made sure I understood what the trade-offs would be given various panel placement options on my particular roof. He and his team also worked with me on installing an upgraded roof coating material and doing an electrical upgrade that I had been considering for a while, and with my new cool-roof white coating, my home is much cooler in the sun than it used to be and I don't have any roof leaks anymore!
The communication
The communication
Kyle B.
Feb 05, 2018
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Altadena Energy & Solar installed new photovoltaic solar panels and rehab our old, existing pool solar water heater. Throughout the entire process, Hans was excellent and did a wonderful job. Joy at the office was extremely helpful and responsive too . We wish all home improvement projects could go as smoothly.
Tho M.
Nov 21, 2016
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Hans and his team installed our solar panels and we couldn't be happier with the results. I did a lot of research and got four different bids before choosing Altadena - who were not the lowest, but close enough considering the personal service I thought we would get. And Hans delivered in spades. Done in about six weeks, instead of the routine 4 months. Got extra panels on the roof, resolved issues, and advised on how we could further save energy with tips given on a walk through of our home. And after our solar was installed and running, returned a number of times to solve small issues
Ellen B.
Jul 14, 2015
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We used Altadena Solar and are very happy with the work. Hans Rosenberger is very knowledgeable, committed to his product and easy to work with. He's not just a salesman. He designed the configuration and filed the rebate paperwork with the city of Pasadena. He was and is very responsive to our concerns and questions and provides information as needed. The installation went smoothly and the installers were efficient and competent. We are delighted with our system as our bimonthly bills are significantly reduced or show a surplus. A big plus for us is that Altadena Solar is a local business
