CTECHI ESS100KW/241KWh Split-Type Commercial & Industrial Battery Energy Storage System (BESS)

KEY SPECS

768V High-Voltage Architecture for Maximum System Efficiency

The ESS100KW/241KWh represents the high-capacity tier of CTECHI's split-type product line, leveraging 15 × 16S1P 314Ah LFP battery packs connected in series to achieve a 768V nominal DC bus — the recognized efficiency sweet spot for 100kW-class energy storage systems. At rated power, the DC current is limited to approximately 130A, substantially lower than lower-voltage equivalents. This translates directly to reduced cable cross-section requirements, lower CAPEX on DC cabling and busbars, and minimal I²R conduction losses. The wide voltage range of 648V to 876V provides generous headroom for grid-forming inverter integration and ensures compatibility with 800V-class PV string inverters for DC-coupled solar-storage configurations. Each pack operates under independent BMU monitoring, providing granular visibility and protection at every system node.

Modular Rack-Based Battery Design for Serviceability and Scale

The battery cabinet houses 15 high-capacity packs in a flexible modular rack configuration, with 3 racks × 5 packs per rack or 5 racks × 3 packs depending on site layout preferences. The hot-swappable pack design with blind-mate DC connectors enables individual pack replacement or maintenance without shutting down the entire system — a critical advantage for facilities that cannot tolerate extended downtime. Front-access-only design eliminates the need for rear clearance entirely, allowing the cabinet to be placed against walls or in corners. Inter-rack communication runs over isolated CAN bus, and each rack features independent DC disconnects for safe localized maintenance isolation. Built-in smoke detection and optional per-rack aerosol fire suppression provide multi-layer fire safety.

100kW SiC Hybrid Inverter with Industrial-Grade Power Quality

The 100KW Hybrid Inverter-J utilizes advanced silicon carbide (SiC) power semiconductors to achieve a peak efficiency of 98.5% (CEC weighted: 98.0%) — best-in-class for transformer-less commercial inverter designs. The three-level NPC topology minimizes harmonic distortion, delivering a total harmonic distortion below 2% at rated power for utility-grade output quality. The wide DC input window of 615V to 950V accommodates the full battery voltage range, while the AC side delivers 100kW rated output (110kW maximum, 110% long-term overload) at 230/400V, 50/60Hz. Full four-quadrant operation enables simultaneous active and reactive power control, while comprehensive grid-support functions include Low Voltage Ride Through, High Voltage Ride Through, and frequency regulation — making the system suitable for utility demand response and grid ancillary service programs.

Comprehensive Multi-Tier Protection and Safety Engineering

Safety is engineered at every system boundary. Cell-level protection includes current interrupt devices (CID), pressure relief vents, and ceramic-coated separators for intrinsic thermal stability. Pack-level protection incorporates DC contactors, fuses, and dedicated BMU modules with continuous voltage and temperature monitoring. Rack-level protection features independent insulation monitoring with a > 500Ω/V threshold. System-level protection includes earth fault detection, optional arc flash detection per UL 1699B for DC circuits, and a redundant system BMS with cross-validation logic. The IP54-rated enclosures are equipped with door interlocks, emergency stops, and integrated smoke detectors. For installations requiring the highest fire safety standards, optional per-rack aerosol fire suppression modules using FK-5-1-12 clean agent provide autonomous fire suppression without external power dependency.

Enterprise Energy Management and Intelligent Connectivity

The ESS100KW/241KWh is designed for connected, intelligent operation from day one. A local Energy Management System (EMS) with a 7-inch HMI touchscreen provides intuitive on-site control and monitoring. Cloud platform connectivity via 4G, Wi-Fi, or Ethernet enables remote fleet management with real-time dashboards displaying SOC, SOH, power flow, and energy revenue tracking. Automated time-of-use scheduling with holiday calendar support optimizes charge/discharge cycles for maximum economic return, while demand limit control prevents facility peak demand exceedance and associated utility penalties. An open API supporting RESTful and Modbus TCP protocols enables seamless integration with third-party EMS, VPP platforms, and building management systems. Onboard historical data logging at high resolution (12-month retention) provides the audit trail required for energy performance contracting and carbon credit verification.

Engineered for Large-Scale C&I and Critical Infrastructure Applications

With 100kW power and 241kWh capacity, this system addresses the most demanding commercial and industrial energy challenges. Primary applications include large manufacturing facilities and logistics centers requiring full-day peak shaving cycles; data center UPS backup ensuring uninterrupted IT operations; commercial solar farms performing energy time-shifting and curtailment mitigation; industrial park microgrids providing islanding capability and grid stability services; and utility-scale C&I demand response programs. The split-type architecture ensures that the substantial battery bank can be housed in a dedicated, climate-controlled battery room while the inverter cabinet integrates directly into the facility's main electrical room — optimizing both safety and electrical efficiency.