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Carlsbad Corporate Center: Commercial Solar Systems That Share Energy Savings Between Buildings

Commercial Case Study

Carlsbad Corporate Center - carlsbad, CA

CHALLENGE

With various tenants throughout the four buildings that make up the Carlsbad Corporate Center in sunny San Diego, building owner H.G. Fenton wanted to find the best way to offer renewable energy to each current and future tenant. 

SOLUTION

HES Renewables designed four commercial solar systems to maximize the rooftop areas of the four buildings. A total of 1456 Maxeon-made 400-watt panels were employed to create a 344.08 kW solar system, a 177.76 kW solar system, a 58.96 kW solar system, and a 58.84 kW solar system. 

The overall design of the separate solar systems incorporated Ivy Energy billing software. The software was set up to interconnect the four separate solar systems into one pool of clean, renewable energy available to all tenants, in any of the buildings. 

CUSTOMER BENEFIT

H.G. Fenton was able to offer each tenant the option to power their company with the renewable energy produced from the four solar systems. Tenants signed up for the dual benefit of running their business on green energy produced on-site, and also for the built-in savings over the price of grid energy at the time of use. 

The tenants now use and share a total estimated annual output of 922,209 kWh of solar energy. H.G. Fenton opened up a new revenue stream for the business center and made each unit more desirable to retain current tenants. The option of solar energy, at a cost lower than grid energy, makes any future vacant units more desirable to companies looking to lower the carbon footprint of their business through renewable energy use. 

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White commercial building in Carlsbad with a rooftop solar system

Quick Facts

  • 640.6 kW
    Total System Size
  • 4 Rooftop Commercial Solar Systems
    Installation Type
  • 1456
    Number of Panels
  • 922,209 kWh
    Estimated Annual Production
  • 4
    Number of Buildings
  • 10
    Number of Tenants
A five-sided small office building wtih solar panels on the roof.
An office building shaped like and 'L' with commercial solar panels on both sections of its roof
A small two-story building in Carlsbad, California with a commercial solar system on the roof.
“As a certified B Corp, sustainability isn’t just a box we check—it’s core to how we operate. Transitioning our brewery to solar power was a critical step in reducing our dependence on conventional energy and moving toward a cleaner, more responsible way of doing business. The process was complex and spanned several months, but the impact is long-lasting. We’re proud to now be brewing with the power of the sun. The team at HES made it possible with their deep expertise, collaborative spirit, and ability to navigate a challenging install with professionalism and care. This project marks a major milestone in our journey toward a more sustainable future, and we’re grateful to have had such a capable partner by our side.”
- Todd KentFounder & CEO, Boochcraft
“As the leading North American solar panel manufacturer, Silfab Solar is committed to partnering with only the most dedicated and quality-focused companies that share our values. We’ve had the pleasure of working with HES Renewables on several key large-scale projects and can confidently say they are among the best in the solar industry. Their dedication to delivering superior energy solutions with precision and professionalism is unmatched. From system design to installation, their attention to detail, exceptional customer service, and unwavering commitment to quality make them an invaluable partner in our mission to deliver tier-one solar solutions.”
- Silfab Solar5-Star Google Review
“Every community we create is designed with the wants and needs of our customers in mind. Our residents tell us that conserving energy and saving money on their electricity bill is important to them. Solterra is the first apartment community in San Diego to derive all the electricity residents need for daily living from the sun.”
- Mike NealPresident and CEO
H.G. Fenton
“The city has an ambitious climate action plan that envisions transferring to 100% renewable energy by the year 2035. We can’t do it without the solar community helping to take existing buildings like this one here at the San Diego Humane Society and making sure it runs on clean solar energy. So this project today is a way that we’re helping to actually achieve our climate goals while at the same time reducing costs for non-profit organizations like the Humane Society. This organization does powerful work, and the more of those resources that they can put towards caring for animals, that they don’t have to put towards energy, is incredible. So this is a multi-faceted win for not just the Humane Society but for San Diego.”
- Todd Gloria on 2.13.24Mayor of San Diego
“At the YMCA of San Diego County, we’re always looking to implement sustainability measures to help our facilities be energy efficient.”
- Luis D’CarpioVice President of Facilities & Sustainability
YMCA of San Diego County
“Hamann Construction selected HES Renewables to help deliver this project due to their competitive pricing and the similar shared values of integrity, quality workmanship, and a customer first focus, all of which has been at the heart of Hamann Construction for over 60 years.”
Hamann Companies
"The reason we went with HES is that they were very transparent, they were up front about what they were going to do, the pricing, everything was laid out clearly and we had a good feeling about them and knew they would get the job done. The installation process went smooth. The project manager broke everything down, month to month, week to week, and sent us updates on what was going on. Those updates told us everything, and if we had questions, we asked, and we'd get responses really quickly. Like I said, it was painless, and we were very happy with that.”
- Michael NepomucenoVice President, Operations
BioFilm Inc.
“Energy Toolbase and HES Renewables have been great partners to work with and we are optimistic about deploying many more energy storage systems together in the future."
- Michael LiuSenior Director of Energy Storage
BYD
"We care about being good stewards of the environment and about our bottomline. Why did we choose to go solar? The ROI is fantastic! We were waiting for a company that gave us a good vibe and was less pushy, sales techniques, and just the nuts and bolts of solar. That's what Ross and his team at HES Renewables offer. They provided a good, solid plan to go solar with little involvement from us after signing the contract. There was little to no disruption to our business operations. Wenjie was the project lead and he ran with it, and now we've got this turn-key product that's going to substantially reduce our power bills. If you were to ask me when is a good time to go solar I'd say yesterday. Do it now! Our only regret is that we didn't do it sooner.”
- Matt Morton Director of Development
The Brigantine Restaurant Corporation
“The decision to go solar was based on multiple factors. Long term cost savings and clean energy was what we wanted, and there was a nice tax write off. When you add all of those factors together it was a no brainer, and we get so much sunlight here that it keeps producing every day. A friend of mine is an engineer and did a lot of research and he recommended HES Renewables. We outsourced our research and compared bids and chose HES Renewables; they met our requirements, they’re a very professional company and have the best equipment...”
- John Cobian GM
Cobian Sandals
“We decided to go solar and to install EV chargers in our facility after a careful analysis of the return on investment (ROI). For the ROI calculation, we took in consideration the benefit to our community, our team, and our bottom line. Solar allows us to continue growing while offsetting the considerable (and increasing) cost of electricity. We chose HES Renewables because of our commitment to invest where we make our x-ray machines – thus creating local jobs and improving the lives of our team and their families."
- Dr. Bill CardosoFounder and Owner
Creative Electron
“As the North American leader in the design, engineering, and manufacturing of premium quality solar panels, we are proud to recognize HES Renewables as our Installer of the Month for their outstanding work on the Aptera Motors Headquarters project utilizing Silfab Commercial solar panels... We value our partnership with HES, having collaborated on several large-scale projects. Their dedication to excellence in system design, precise installation, and commitment to delivering superior energy solutions is commendable.”
- Paolo MaccarioPresident and CEO
Silfab Solar
“BEGA North America chose to partner with HES Renewables for the design and installation of solar panels and energy storage systems based on their experience and knowledge. HES Renewables has been a reliable partner through the numerous issues that arise from a project as large as this one. Great support, great work, and great communications through the entire process.”
- Ivan GregoryEnvironmental Health & Safety Manager, BEGA North America
“We’re looking forward to seeing the impact of the 120 solar panels that were installed by HES Renewables to conserve energy and reduce costs... Beyond their primary function of supplying energy, these panels will have the added benefit of providing shade to our animals, staff and volunteers who are enjoying our new outdoor agility yards.”
- Jane Elliot-HughesSr. Director, Support Services at San Diego Humane Society

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SOLAR, ENERGY STORAGE, & EV CHARGING STATIONS

We are a San Diego-based solar energy production and energy storage installation company. We have been an energy innovator since 2001 and can handle projects from solar-only arrays to micro-grid solar and storage systems with on-site EV charging stations. 

If you’re looking into the benefits of on-site energy production, energy storage, or EV Charging capability, we’d love to speak with you. We’ll show you how to lower and stabilize energy costs, receive the maximum incentives, open new revenue streams, and gain control over one of the largest expenses of your business or commercial property. 

Click here to be contacted by an HES Renewables representative, or simply dial us at 866-HES-RNEW (866-437-7639).

Robert Laverty

Senior Energy Consultant, Residential

Robert Laverty joined the HES team in the summer of 2018, bringing his ten years of solar design experience and his Bachelor’s degree from the University of Puget Sound with him. Robert is dedicated to finding solutions to help families produce and store electricity in order to reduce their reliance on grid power as well as help reduce their household’s carbon footprint. Robert’s experience as a newspaper editor as well as his involvement with the sustainability-focused Rocky Mountain Institute drives him to constantly seek out innovative ways to meet energy needs through renewable resources as well as helps him share those ideas with Southern California homeowners. When not at work or volunteering time with his church or community, Robert spends time with his wife and two sons or pursues his passion of fly fishing.

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