CycleWatt
CycleWatt converts complete retired EV battery packs into stationary energy storage systems without dismantling them, preserving the original automotive enclosure and BMS while adding dual-redundant controllers and energy management. The company's E-Stack® system delivers 130 kWh of reference storage using four NMC packs with 40 kW AC output, targeting sites facing power bottlenecks.
- Energy
- Battery Technology
- Clean Technology
- Hardware
- Artificial Intelligence
- Software Only
- Utilities
Funding
Founders
Founder details are not available yet.
Product
Problem
Retired EV battery packs, which 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 higher 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. Each pack moves through a Drop-Test-Plug-Play workflow, preserving the automotive system already engineered into the battery 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 retaining 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 in three-phase configurations including 400 V
- 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 input up to 60 kWp across multiple MPPT channels
- Four-layer safety architecture preserving OEM protection while adding cabinet monitoring, HVAC, temperature and smoke sensing, water-leak detection, and fire suppression
- Validation through MIL, PIL, and HIL test environments; products in development include PackRead for BMS data access, PackCheck for mobile capacity testing, and PackDis for controlled discharge and recycling preparation
- Operating envelope from -20 °C to 45 °C at altitudes up to 2,000 m with IP55 cabinet protection and optional remote monitoring via 4G or Wi-Fi