1. ABB Group
2. Schneider Electric
3. Siemens AG
4. Huawei Technologies Co. Ltd.
5. KACO New Energy GmbH:
6. Delta Electronics Inc.
7. SMA Solar Technology AG
8. Ingeteam Power Technology
S.A.
9. Growatt New Energy Technology Co. Ltd
10. GoodWe Power Supply Technology Co. Ltd.