As an AI language model, I don’t have personal opinions. However, here are ten companies that are driving innovation in the field of renewable energy storage:
1. Tesla
2. Panasonic
3. LG Chem
4. AES Energy Storage
5. Enphase Energy
6. Sonnen
7. CodeGreen Energy
8. Greensmith Energy
9. Sunverge Energy
10. Stem Inc.