CycleWatt converts retired EV battery packs into smart, modular energy storage systems without dismantling the packs, preserving the original automotive engineering and BMS. Its E-Stack® product integrates qualified whole packs with dual-redundant controllers, power conversion, and energy management for grid, PV, and charging applications. The company targets both pack suppliers and site operators through turnkey second-life solutions and BESS integration partnerships.
Funding
Funding not disclosed
Founders
Product
Problem
Retired EV battery packs, which can retain 70-80% usable capacity, often become liabilities requiring expensive recycling at around €1,000 per pack. Simultaneously, electrified sites face power bottlenecks and need affordable local storage, but new battery systems carry high cell costs and supply-chain risks.
Solution
CycleWatt keeps qualified automotive battery packs intact and integrates them into stationary energy storage without dismantling. The company screens BMS data, insulation, safety status, and usable condition before connecting qualified packs to its E-Stack® system through custom interfaces and independent controls. The original pack protection and OEM BMS remain active while CycleWatt adds deterministic dual-redundant controllers, power conversion, and energy management to coordinate with grid, site loads, charging, and renewables. The result is a deployable second-life battery energy storage system that preserves the engineering value of the original pack while adding the intelligence required for safe stationary operation.
Target Audience
Primary customers include recyclers, OEMs, car dismantlers, and fleet operators who supply retired battery packs, as well as charging stations, commercial and industrial sites, and solar or wind farms seeking affordable stationary storage.
Features
- Whole-pack utilization that retains the complete automotive enclosure, thermal architecture, and original BMS for maximum value preservation
- E-Stack® all-in-one outdoor BESS with 130 kWh reference storage using four complete NMC EV packs and 40 kW AC output
- Dual-redundant in-house controllers with VCU-inspired system logic for deterministic safety and state management
- Hybrid PV-ESS architecture supporting grid, photovoltaic, charging, and site load coordination with optional 60 kWp PV input
- Layered safety approach preserving OEM protection while adding cabinet monitoring, HVAC, fire suppression, and remote supervision
- Validation through MIL, PIL, and HIL test environments plus products in development including PackRead, PackCheck, and PackDis for diagnostics and recycling preparation