e-On Batteries vs Fourth Power
e-On Batteries
Powering sustainable energy with advanced lithium battery solutions for industries, homes, and electric vehicles
4 employees · est. 2015 · Hurst, United States
Fourth Power
Energy Storage that Grows with the Grid
35 employees · est. 2021 · Cambridge, United States
e-On Batteries is the older company (2015 vs 2021); Fourth Power is the larger of the two.
Side-by-Side Comparison
| Metric | e-On Batteries | Fourth Power |
|---|---|---|
| Founded | ||
| Founded | 2015 older | 2021 |
| Headquarters | ||
| Headquarters | Hurst, United States | Cambridge, United States |
| Employees | ||
| Employees | 4 | 35 larger |
| Industry | ||
| Industry | Manufacturing, Renewable Energy, Energy Storage | Energy, Renewable Energy, Energy Storage |
| Funding Stage | ||
| Funding Stage | Not tracked yet | Series A |
| Total Funding | ||
| Total Funding | Not tracked yet | $19.00M |
| Funding Rounds | ||
| Funding Rounds | Not tracked yet | 1 |
| Services | ||
| Services | Not tracked yet | Thermal energy storage systems, Utility-scale energy solutions, Flexible grid-scale storage solutions |
| Target Customers | ||
| Target Customers | Not tracked yet | Utility companies, Energy infrastructure developers, Renewable energy sectors, Government energy agencies |
| Taxonomy | ||
| Taxonomy | LiFePo4 BatteryEnergy Storage SystemsBattery Management SystemSmart GridMicrogridElectric Vehicle Charging +6 | Thermal BatteryEnergy StorageGrid StorageThermal StorageUtility-Scale StorageLong-Duration Energy Storage +8 |
| Website | ||
| Website | e-onbatteries.com | gofourth.com |
About e-On Batteries
e-On Batteries is a pioneering company based in Dallas, Texas, founded in 2015. Specializing in lithium-based Battery Energy Storage, the company focuses on long-term reliability and safety in its Smart LiFePo4 Battery Energy Storage Systems. The proprietary Battery Management System (BMS) and UL197...
About Fourth Power
Fourth Power is making significant strides in the energy sector with its innovative thermal battery technology. Founded in 2021 and headquartered in the United States, the company focuses on transforming renewable energy into an on-demand source via utility-scale thermal storage. These technological...
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Compiled from the BounceWatch company index. We last looked at e-On Batteries on 14 Sep 2024, and Fourth Power on 18 Aug 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
