Xuzhou Tianzhiyuan New Energy Technology Co.,Ltd., a professional and vigorous renewable energy company which focuses on PV products and system, is a wholly owned subsidiary of Wanlong Group, with a total area of approximately 32000 square meters. Sumthor is the brand of Xuzhou TianZhiYuan Technology Co., Ltd. in PV field. By cooperating with international academic institutions, and keeping a keen eye on PV technology trends, Sumthor has the advanced technology of inverters and provides R&D, production, sale, and after-sales service and has the project qualification of design and construction.Sumthor core product string inverters are more reliable, smarter, cost effective and high performance. Other PV products including: charger controllers, solar street lamp, battery, PV panel are all good in quality and beautiful in design. At the same time, our installation team provides "one-stop solution" to help clients get more benefits from small, medium, commercial and ground-based power station and shorten investment return time by professional capability.Sumthor believes that quality is vital to an enterprise and our products certified by VDE, AS477, G83/G59, CQC and approved by other international authorities. Sumthor focuses on providing the best clients experience and understanding our clients better. We ensure the performance of all products and we pay attention to clients&＃39; visual perception simultaneously. Everyone of Sumthor adheres to the principle of Clients First, Service with Heart.