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Welcome to Siam Sun

Solar Made Simple

Start Saving from Day One. 0 investment cost.

Free Solar System

Better Tariff

Greener business

Watch our video

"This isn't just about saving money, it's about something bigger"

Save Money with the

Sun

100%

Free

Discounted Electricity Tariff

Real-time energy insights

No base- or maintenance fees

Experienced installers

Get To Know Us

The Teams Behind Siam Sun

Together, We Shine!

At Siam Sun, we are a dedicated team of investors, engineers, and energy strategists, partnering with the Swiss-led Aero Solar & Automation Co., Ltd. Together, we bring over a decade of expertise in designing and building solar systems for embassies, government projects, and countless private and industrial clients (see references). Our passion for innovation and sustainability drives us to create smarter, more efficient energy solutions—because we believe that the future of power should be accessible to everyone.

10+ years of Thai solar experience

Flexible design for all roof types

Legal, high quality solar systems

Grid-tied, interruption-free installations

About us

Unlock Answers, Explore FAQs

Who are we? How do we make money? How do you qualify? The answers are here!

5 MW+

installed capacity

We are an All-In-One team of experienced solar experts and investors. This combination allows us to deliver CAPEX-free solar systems that are built by professionals.

We share the cost-savings of solar energy with you. In the long run, that is how we make our money back (that we have invested into your solar system). You pay an electricity tariff to us that is lower than your current provider and we wait, while ensuring your system operates flawlessly (which is in our interest too).

All solar systems are installed by our partner "Aero Solar & Automation", who has over 10 years of experience in Thailand and has installed solar to the Embassies of Switzerland and Austria in Bangkok, amongst hundreds of other clients. See more in the "About us" section.

We are bridging the gap between your solar system and you. Often, people can not or do not want to spend money on an expensive solar system. We provide the system for free and offer you a better electricity tariff. For you that means no worries and only savings.

All our systems are grid-connected. That means when the sun is shining, our more affordable electricity replaces the expensive electricity from the grid. When the sun is not shining, you are still connected to the grid and there is no interruption. You'll get to see a live-view of your energy flows on an app.

For us, it has to work out financially. If you are not consuming electricity during sunshine hours, we cannot offer our electricity to you and we won't make our money back. Therefore, you need to provide a stable offtake during sunshine hours to us; ideally a 7-day-a-week operation.

The amount of solar energy you need depends on your roof, energy usage and location. We'll figure it out together . Just shoot us a message!

Excited? Let's talk solar!