Engineered for C&I and Utility-Scale Energy Demands
High Voltage Lithium Battery Systems for Commercial Battery Storage
Scalable HV architecture built for projects where uptime, efficiency, and compliance are mandatory.
Introduction
Engineered for C&I and Utility-Scale Energy Demands
A high voltage battery system operates at 100V–1000V DC by stacking 51.2V battery packs in series, reducing current draw and cable losses at scale. Unlike low voltage systems, HV architecture integrates directly with grid-tied battery storage inverters, making it the preferred choice for commercial battery storage projects above 30kWh — including C&I facilities, industrial battery installations, and large residential backup systems requiring a reliable, high-efficiency LiFePO4 battery system.
What Is a High Voltage Battery System?
Rakour HV series stacks 51.2V LiFePO4 battery packs in series via a BCU, reaching up to 980V DC — matching the input window of high voltage hybrid inverters for direct, high-efficiency AC conversion.
Modular Series Architecture — 185.6V to 980V DC Output
Dual-Layer Battery Management System (BMS) — Slave Module + BCU Master
Native High Voltage Inverter Integration via CAN / RS485
Our High Voltage Battery Series
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C&I HV-51.2V 314Ah
256 – 716.8 V | 5–14 modules
C&I HV-51.2V 200Ah
≥ 6,000 cycles
Advantages of High Voltage Architecture
Rakour HV series delivers measurable electrical and installation advantages over low voltage systems — reducing conductor sizing, simplifying string topology, and scaling from 40kWh to 244kWh+ within a single certified cabinet footprint.
Higher Efficiency and Lower Conductor Loss
At 512V–870V DC bus voltage, the 280Ah-HV string operates at a maximum 140A — substantially lower than an equivalent low voltage parallel system. Lower current directly reduces resistive cable loss (I²R), allowing smaller conductor cross-sections and reducing balance-of-system material cost across longer DC cable runs.
Modular Scalability from 40kWh to 244kWh Per String
Each 51.2V battery pack module adds ~14.3kWh (200Ah) or ~14.34kWh (280Ah) per step. The 200Ah-HV scales from 4–17 modules (40.96–102.4kWh); the 280Ah-HV from 8–17 modules (114.7–243.7kWh). Up to 4 strings in parallel extend total usable capacity without redesigning the DC bus or inverter interface.
Engineered for C&I Energy Storage Project Deployment
Rakour HV cabinet systems are documented in multi-unit outdoor enclosure configurations — including 100kW/174kWh and 300kW/522kWh reference designs — validating this modular battery storage architecture for factory, commercial building, and peak shaving battery applications requiring compact footprint, fan cooling, and ≥8,000-cycle LiFePO4 service life.
Industrial Battery Applications
Rakour HV series is documented for deployment across residential, commercial, industrial, and grid-tied scenarios — each validated through real system design case studies.
Large Residential Villas — 50kW Load, Three-Phase 400V
The 200Ah-HV supports residential installations with 50kW load demand and 100kWh daily consumption, operating on three-phase 400V. Its 185.6V–980V range pairs directly with HV hybrid inverters without voltage step-up conversion.
Hybrid Solar Storage Systems — PV + Grid + Battery
Rakour HV batteries charge via PV or grid through the inverter's integrated MPPT. System design references confirm configurations up to 307.2kWh total capacity, using 30 rack modules behind a single hybrid inverter on a grid-tied battery storage architecture.
C&I Energy Storage — Factory and Industrial Park Deployment
Documented factory case: 250kW load, 300kWh/day consumption, three-phase 400V. The 280Ah-HV scales to 243.7kWh per string, with up to 4 parallel strings and outdoor cabinet integration supporting commercial battery storage sites at 100kW–300kW+ system power ratings.
Peak Shaving, Valley Filling & Backup Power
The 314Ah-HV product documentation identifies peak shaving, valley filling, and capacity allocation as primary use cases for battery energy storage systems — including data centre backup and islanded microgrids where the BMS manages automatic charge/discharge cycling against time-of-use tariffs.
Rack Mount Battery Backup System Architecture
Rakour HV system connects PV array, high voltage battery stack, and grid/load through a single HV hybrid inverter — controlled by a two-tier battery management system (BMS) with full series voltage protection.
System Topology — PV Array → HV Inverter → Battery Stack → Grid / Load
The HV battery stack connects to the inverter's BAT terminal at up to 980V DC. PV input feeds the inverter's MPPT, which charges the stackable battery rack or exports to grid. Backup load and home load outputs are managed independently via the inverter's LOAD and GRID ports.
Master-Slave BMS Architecture — Slave Module + BCU Master Control
Each 51.2V battery pack module runs a slave BMS collecting real-time cell voltage and temperature. Data transmits to the BCU master via internal CAN. The BCU — containing master BMS, DC fuse, soft-start circuit, and cut-off protection switch — governs charge/discharge current across the full series stack.
CAN / RS485 Inverter Communication & Series Voltage Protection
The BCU communicates with the inverter via CAN (PIN4/CAN-H, PIN5/CAN-L) or RS485, transmitting SOC, voltage, and temperature in real time. The BMS enforces over-charge, over-discharge, over-current, and high/low temperature protection autonomously — triggering the cut-off switch before inverter-level intervention is required.
Inverter Compatibility
Pre-Validated HV Pairing with Deye, SMA, Solis, and Victron
Rakour HV batteries are designed to integrate directly with high voltage hybrid inverters via standardised CAN or RS485 communication — no external protocol converter required. The BCU handles all charge/discharge negotiation autonomously.
HV Battery Voltage Window — 185.6V to 980V DC
Rakour HV series operates across 185.6V–980V DC (200Ah-HV) and 358.4V–979.2V (280Ah-HV), covering the battery input window of mainstream high voltage battery inverter platforms that require 160V–1000V DC bus input.
CAN / RS485 Communication — BCU to Inverter BMS Port
The BCU's dedicated CAN port (RJ45, PIN4 CAN-H / PIN5 CAN-L) connects directly to the inverter's BMS communication port. Via CAN or RS485, the battery management system (BMS) transmits real-time SOC, voltage, and temperature — allowing the inverter to self-adapt charging current and cut-off voltage without manual parameter entry.
Documented Deye Compatibility — 29.9K–80K Series
Rakour provides step-by-step connection guides for Deye SUN-29.9K~50K-SG01HP3 and SUN-80K-SG02HP3 inverters. Both configurations use the parallel shunting method — connecting the BCU's P1+/P1− to BAT1 and P2+/P2− to BAT2 — to maximise discharge current output where individual BAT port current is hardware-limited to 50A per input.
Safety & Certifications
Every Rakour HV battery ships with a complete certification package covering transport, electromagnetic, and electrochemical safety — backed by third-party lab-verified test reports, not self-declarations.
Certification Coverage — CE, IEC 62619:2022, UN38.3, RoHS
Rakour HV and LV series hold CE marking, UN38.3 transport certification, and RoHS Directive 2011/65/EU compliance (tested per IEC 62321 series). IEC 62619:2022 third-party testing — conducted by Shenzhen CCJC Technology — confirmed zero fire or explosion across external short-circuit, thermal abuse, forced discharge, overcharge voltage/current, and overheating control tests.
BCU Hardware Safety Layer — DC Fuse, Soft-Start, Cut-Off Switch
The BCU integrates a DC fuse, soft-start circuit, and a dedicated cut-off protection switch as independent hardware safeguards. The soft-start circuit prevents inrush current at connection — allowing the Rakour HV battery energy storage system to operate with inverters that lack a native soft-start function.
BMS Multi-Layer Protection — Over-Charge, Over-Current, Thermal
The dual-layer battery management system (BMS) enforces autonomous protection at both cell and system level. Charging stops if cell voltage exceeds 3.6V, current exceeds 100A (200Ah-HV) or 140A (280Ah-HV), or temperature rises above 60°C. Discharge is blocked below −20°C. All thresholds were independently validated in IEC 62619:2022 lab testing with passing verdicts.
High Voltage vs. Low Voltage — Which Fits Your Project?
System Voltage Selection Criteria for EPCs and Design Engineers
High-efficiency DC bus
Standard LV inverter
Lower I²R conductor loss
C&I scale capacity
Small incremental steps
Flexible home expansion
160 V – 1000 V DC input
Long-term C&I deployment
Model dependent
Broader compliance
Data sourced from Rakour HV & LV product manuals. Specifications vary by model configuration.
OEM & Project Support
Rakour's commercial battery storage offering extends beyond hardware — providing pre-sales system design, post-sales remote support, and supplier technical training backed by a fully documented manufacturing and certification process.
Configurable Stack Architecture — 4 to 17 Modules Per String
Pre-Sales, Remote After-Sales & On-Site Technical Support
Manufacturing Standards & OEM Label Readiness
High Voltage Solar Battery Storage
FAQs
High voltage lithium battery systems are widely used in large residential and commercial energy storage applications.