Fortress Power
Smart, Clean Energy Storage for Homes and Business - Lithium Batteries
61 employees · est. 2016 · Langhorne, United States
K2 Energy
Powering the Future: Lightweight, Long-Lasting Rechargeable Battery Systems for Electric Vehicles and Energy Storage
51-200 employees · est. 2006
K2 Energy is the older company (2016 vs 2006).
Side-by-Side Comparison
| Metric | Fortress Power | K2 Energy |
|---|---|---|
| Founded | ||
| Founded | 2016 | 2006 older |
| Headquarters | ||
| Headquarters | Langhorne, United States | Not tracked yet |
| Employees | ||
| Employees | 61 | 51-200 |
| Industry | ||
| Industry | Energy, Manufacturing, Energy Storage | Energy, Manufacturing, Renewable Energy |
| Funding Stage | ||
| Funding Stage | Growth | Series Unknown |
| Total Funding | ||
| Total Funding | Not tracked yet | $2.00M |
| Funding Rounds | ||
| Funding Rounds | 1 | 3 |
| Services | ||
| Services | Energy Storage System Sales, Installer Training and Certification, Technical Support and Documentation, Residential and Commercial Energy Solutions, Rebates and Incentives Programs | Not tracked yet |
| Target Customers | ||
| Target Customers | Homeowners, Commercial Businesses, Industrial Facilities, Schools, Healthcare Centers, Government Facilities, Energy Installers and Distributors | Not tracked yet |
| Taxonomy | ||
| Taxonomy | Clean Energy Storage, Lithium Iron Phosphate Batteries, Energy Storage Solutions, Battery Manufacturing, Compact Battery Systems, Reliable Energy Solutions, Home Energy Storage, Commercial Energy Storage, Solar Energy Storage, Energy Dependability, Affordable Energy Solutions, Battery Safety, Premium Energy Products, Sustainable Energy Systems | Battery Systems, Electric Vehicles, Energy Storage, Lithium Iron Phosphate, Rechargeable Batteries, Cell Batteries, Power Grid Storage, Optimization, Innovation |
| Website | ||
| Website | fortresspower.com | k2energysolutions.com |
About Fortress Power
Fortress Power is a prominent player in the rapidly growing energy storage sector, delivering smart, clean energy storage for homes and businesses through its specialization in Lithium Iron Phosphate batteries. Since its inception in 2016, this Pennsylvania-based company has successfully carved a ni...
About K2 Energy
K2 Energy is a company that specializes in the development, manufacturing, and sale of rechargeable battery systems tailored for electric vehicles and energy storage needs. Their product range includes rechargeable lithium iron phosphate battery products, such as battery packs and cell batteries for...
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Compiled from the BounceWatch company index. We last looked at Fortress Power on 14 May 2026, and K2 Energy on 13 Sep 2024. 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.