Company

Welcome to Green Watt Ltd (Vihreä Watti Oy) – where environmental responsibility meets the power of innovation.

We are a 100% Finnish technology company that combines decades of experience with cutting-edge innovation to deliver a sustainable, efficient, and intelligent energy future. Our expertise spans energy storage systems (BESS), solar and wind power, LED lighting, as well as reserve market and demand response solutions – all designed to make energy more flexible, profitable, and cleaner.

Green Watt’s intelligent energy solutions provide our customers with significant savings in energy costs, additional revenue opportunities from reserve markets, and an exceptionally fast return on investment – making every project financially attractive and highly profitable.

Our Mission

Our mission is simple: to maximize our customers’ energy production and return on investment by combining advanced technology, energy efficiency, and data-driven intelligence into one seamless solution.

We operate without intermediaries – designing, delivering, and installing every system ourselves. This ensures cost-efficiency, premium quality, and rapid implementation for every project.

Core Expertise

Energy Storage and Reserve Market Solutions At the heart of Green Watt’s business are reserve market-compatible energy storage systems (Battery Energy Storage Systems, BESS), ranging from 5 kWh residential batteries to 10 MWh “all-in-one” energy containers, and scalable industrial solutions up to hundreds of megawatts.

Our solutions ensure efficient energy storage and utilization, improving system reliability and flexibility, while enabling optimal control and financial optimization of energy use.

We collaborate with leading global battery manufacturers, such as BYD and Enershare, ensuring our customers receive technologically advanced, reliable, and long-lasting solutions.

Partnerships and Innovation

Green Watt develops next-generation reserve market, arbitrage, and demand response technologies in cooperation with industry leaders such as Väre Oy, CapaloAI, and Sweden’s KanEL. Our goal is to build a fully integrated, intelligent energy network that serves both businesses and society sustainably and efficiently.

Comprehensive Energy and Control Solutions

In addition to energy storage systems, we provide turnkey wind and solar energy solutions as well as comprehensive park control systems in partnership with Danish company DEIF. Together, we deliver complete control over energy production and consumption – across all levels and applications.

Experience and Nationwide Coverage

With over 30 years of experience in the energy sector, Green Watt has built a nationwide installation network across Finland, ensuring fast, reliable, and scalable deliveries. Our in-house installation team, with over 15 years of field experience, guarantees seamless and high-quality execution on every site. Every delivery is a promise of quality – that’s why we offer even 15-year warranty on all our products and installations.

Battery Systems and Energy Storage:
We offer battery solutions ranging from 5 kWh systems to hundreds of MWh energy container solutions. These solutions ensure efficient energy storage and utilization, improving the reliability and flexibility of your energy systems and enabling you to manage and optimize your energy needs.

Wind Power:
Vihreä Watti takes wind energy to the next level. We generate clean power with our wind turbines, which not only reduce environmental impact but also enhance energy production efficiency. Discover our latest innovations and take the first step toward a more sustainable tomorrow.

Reserve Markets:
We enable our customers to participate in the reserve power market and earn revenue by selling generated electricity. This provides flexibility and financial benefits while also promoting sustainable development and energy production efficiency.

Demand Response Automation:
We proudly offer intelligent demand response automation in cooperation with our partners. This enables efficient energy usage, benefiting both the environment and your costs. Join us in building a smarter energy grid!

LED Lighting:
Illuminate your spaces in an environmentally friendly and energy-efficient way with our LED lighting solutions. Our wide product range offers a solution for every space, and you can be confident that your choice is both eco-friendly and economically smart.

Solar Energy:
The power of the sun is within your reach—harness it with us. We provide solar energy solutions for all scales, whether you are an individual or a large enterprise. Turn sunlight into profit and reduce your carbon footprint with solar power.

Heating Innovations:
Future-ready heating solutions! Explore our versatile range of heating systems, from traditional heat pumps to next-generation smart heating solutions. Vihreä Watti brings warmth to your life in a sustainable way.

We aim to provide our customers with comprehensive solutions that maximize both energy production and return on investment. All our projects are carried out using the latest technology. Depending on the site, we integrate all our services into a seamless package, without intermediaries. Our in-house installation team, with over 15 years of experience in the field, ensures smooth and high-quality cooperation on-site. We offer a 5-year installation warranty on all our products.