Greeting
At STI Solar, everything revolves around one thing: your energy future.
For over 20 years, we have been developing and manufacturing high-performance solar thermal systems in Germany that provide sustainable energy for your home. Our collectors combine quality, efficiency and durability – whether on the roof, balcony or in the garden.
When it comes to photovoltaics, we focus on a good price-performance ratio.
Whether you are a homeowner or a landlord, our tailor-made solutions make you less dependent on the energy market and allow you to invest in a clean, secure future. Our innovative hybrid collectors combine the power of the sun and technology – for maximum yield and efficiency in the smallest of spaces.
STI Solar means:
✔ Reliable technology | Made in Germany
✔ Personal advice & individual solutions
✔ Sustainable energy – today and tomorrow
👉 Let's rethink your energy together.
Get a no-obligation consultation now. Contact us by Mail or WhatsApp.
Étienne Sauppe, Managing Director
OUR COMPANY
Future-oriented solar thermal* and photovoltaic solutions | *Made in Germany | For homeowners, landlords and visionaries.
STI in Saxony has been manufacturing high-quality solar collectors for more than 20 years. Thanks to automated production and state-of-the-art manufacturing processes, we manufacture collectors to the highest quality standards.
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2003 |
Foundation of the company Solar-Technologie-International GmbH |
|
2004 |
Start of collector production in Crimmitschau |
|
2006 |
Move to the current larger production site in Meerane |
|
2007 |
Development of the first generation system protection (DrainBack) |
|
2010 |
Installation of the first hybrid collector field (Solar thermal in combination with photovoltaics) |
|
2012 |
Collector optimization - FKF series |
|
2016 |
Integrated roof window |
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2018 |
Certified heat pump collector |
|
2023 |
Start of production of the inverter shelter |
- Collector production on approx. 3,000 m² production area
- Training and Innovation Centre
- Indoor test rig
- Extensive machine park
- Simulation/ design software
Products and services
Products | Our solutions for your energy future
Your home deserves the best energy source
Our solar thermal and photovoltaic solutions stand for maximum efficiency, flexible installation options and long-lasting quality. From the powerful FKF flat-plate collector to the Aldo+ alpine specialist and the compact FINO, we offer tailor-made systems for every requirement.
Discover our innovative hybrid collectors, which combine solar thermal and photovoltaic technology in a single module – for maximum solar power in the smallest of spaces.
👉 Find the right product for you in the solar thermal and/or photovoltaics section.
Advantages | Why STI Solar?
More than energy | An investment in your future
With STI Solar, you are choosing quality "Made in Germany", over 20 years of experience and a passion for making sustainable energy accessible to everyone.
Our systems help you reduce energy costs, protect the environment and strengthen your independence – day after day.
Your advantages at a glance:
✔ High efficiency and service life
✔ Flexible solutions for every property
✔ Personal advice and comprehensive service
✔ Sustainable production in Germany
Service | Your project in the best hands
We accompany you from the initial idea to implementation
At STI Solar, you are the focus of our attention. Our experienced team supports you from the initial consultation through planning to installation – reliably, competently and personally.
We listen, understand your wishes and work with you to find the perfect energy solution for your home or property.
👉 Secure your personal consultation now.
FAQ | Your questions | Our answers
Everything you want to know about solar energy.
What is the difference between solar thermal energy and photovoltaics?
Solar thermal energy uses the sun's energy to heat water and heating systems | Photovoltaics convert sunlight directly into electricity.
How long does a solar system from STI Solar last?
Our collectors are designed for maximum durability | You can expect a service life of 20 years or more.
Can I install my system myself?
Many of our systems are designed for easy installation | However, we are happy to support you with our experienced team of experts and/or certified partners if necessary.
👉 Do you have any further questions? Feel free to ask us via WhatsApp.
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