Powering the Futurewith Clean Energy
Since 1971, TOHSEI has been pioneering innovative DC power solutions and sustainable energy systems that power critical infrastructure worldwide.
Our Power Solutions
Comprehensive range of advanced power systems designed for reliability, efficiency, and sustainability.
TNPL Series
Revolutionary DC power supply system for solar energy self-consumption with grid-independent operation.
Learn MoreBattery Chargers
Patented high-efficiency charging technology that extends battery life and reduces energy consumption.
Learn MoreUPS Systems
Uninterruptible power supply for critical infrastructure with seamless failover capability.
Learn MoreDC Power Equipment
Rectifiers and DC power systems for telecommunications and industrial applications.
Learn MoreRoad Station "Shichinohe"
Selected as a "Priority Road Station Candidate" by the Ministry of Land, Infrastructure, Transport and Tourism. Our TNPL DC power supply system provides sustainable, grid-independent power to this vital infrastructure.
Road Station Shichinohe, Aomori
Why Global Leaders Choose TOHSEI
Five decades of innovation, reliability, and commitment to excellence.
Patented Technology
Our proprietary charging technology (Patent No. 4499164) delivers superior performance and extended equipment lifespan.
Strategic Partnerships
Collaborations with industry giants including Mitsubishi Heavy Industries, Nippon Sharyo, and Kowa Corporation.
Sustainability Focused
NEDO-adopted and certified as a Zero Emission Challenge company by Japan's Ministry of Economy, Trade and Industry.
Ready to Power Your Future?
Connect with our team of power solution experts to discuss how TOHSEI can transform your energy infrastructure.