High Voltage Energy Storage Solutions
Scalable LFP battery systems from 5 kWh to 160+ kWh. Built-in BMS, Wi-Fi monitoring, and broad inverter compatibility for reliable energy independence.
Understanding how HV systems differ from standard 48V setups — and why it matters for your energy project.
A high voltage battery system operates above 100V DC, typically between 200V and 980V. Unlike standard 48V low-voltage systems, HV architecture reduces current flow for the same power output, meaning thinner cables, lower transmission losses, and greater overall efficiency. Rakour's HV series operates within a working voltage range of 232V–979.2V.
Each Rakour home battery storage system consists of 5 to 17 individual 51.2V LiFePO4 modules connected in series, managed by a centralized BCU (Battery Control Unit). The BCU integrates the master BMS, DC fuse, soft-start circuit, and power management logic into a single controlled unit.
A battery energy storage system (BESS) is any setup that stores electrical energy for later use. HV-based BESS platforms are increasingly adopted in residential, commercial, and light industrial projects because they pair directly with high-voltage inverters — eliminating the step-up conversion losses common in lower-voltage designs.
Discover Rakour's small high-voltage behind-the-meter C&I storage systems. Engineered for commercial facilities and light industries, our modular BESS platforms integrate smart PCS and dual-layer BMS to deliver reliable peak shaving, demand charge reduction, and seamless backup power without costly grid upgrades.
Secure your business operations against grid failures. Our high-voltage backup BESS delivers seamless millisecond-level switchover to protect critical production lines and sensitive IT infrastructure.
Maximize your solar ROI by coupling PV generation with high-voltage battery storage. Store excess midday generation to power your facility during peak-rate hours and cloudy periods.
Flatten load profiles and eliminate demand charges for heavy industrial facilities. Optimize factory energy bills through strategic peak shaving and peak-valley tariff arbitrage.
Build independent, self-sustaining energy systems for remote facilities and island grids. Seamlessly integrate solar, diesel generators, and BESS for reliable 24/7 power supply.
A straightforward comparison of HV and LV battery storage to help installers and buyers choose the right architecture for their project.
High voltage battery systems operate between 200V–980V, while low-voltage systems are fixed at 48V. HV systems carry less current for equivalent power — a 10 kW HV system at 500V draws only 20A versus 208A at 48V. Lower current means thinner wiring, reduced heat, and higher round-trip efficiency on larger installations.
LV systems work well for small residential setups under 15 kWh with standard 48V inverters. Rakour's home battery storage system in HV configuration is better suited for whole-home backup, commercial demand management, and solar-plus-storage projects above 20 kWh — where efficiency gains and inverter compatibility justify the architecture choice.
Both HV and LV systems can use LiFePO4 or NMC cells. However, lifepo4 vs lithium ion comparisons consistently show LFP offers superior thermal stability at high-voltage series configurations — a critical advantage. Rakour exclusively uses LiFePO4 cells across all HV product lines for this reason.
A clear breakdown of the energy flow and control logic inside Rakour's HV battery storage systems, designed for installers and technical buyers.
During charging, AC power from the grid or PV inverter is converted to DC and stored across the series-connected 51.2V modules. The BCU governs charging voltage and current limits in real time. During discharge, stored DC energy flows through the BCU to the inverter, which converts it back to AC for home or commercial loads.
Rakour's dual-layer battery management system includes a master BMS inside the BCU and a slave BMS in every individual module. The BMS battery management system monitors cell voltage, current, and temperature continuously — triggering protection responses for overcharge, over-discharge, over-current, and thermal anomalies without manual intervention.
The HV battery communicates with the inverter via CAN or RS485 protocol. The bms battery management system transmits real-time state-of-charge and fault data directly to the inverter. Rakour's built-in soft-start circuit also protects inverters that lack native soft-start functions, ensuring a safe and stable connection at system startup.
Real numbers from Rakour's HV datasheets — so you can evaluate system suitability before requesting a quote.
Rakour's 51.2V314Ah-HV supports 5 to 17 modules in series, giving a working voltage range of 232V to 979.2V. Total energy scales from 80.38 kWh (5 modules) to 225.08 kWh (14 modules). Maximum current is 200A with a peak power of 10,240W per module count — making it viable for demanding residential and light commercial loads.
Usable battery capacity at 90% depth of discharge starts at 72.34 kWh for a 5-module system. LiFePO4 battery life exceeds 6,000 charge-discharge cycles under standard conditions. Rakour's HV modules operate across a discharge temperature range of −20°C to 60°C, maintaining consistent output in cold climates without performance derating at rated load.
All Rakour HV systems support CAN and RS485 communication protocols for inverter integration. The BCU includes a DC fuse, cut-off protection switch, and 24V DC power supply module. Current certifications cover CE, MSDS, and UN38.3, confirming compliance with international transport and electrical safety standards relevant to residential and commercial deployments.
From whole-home backup to commercial peak shaving, here are the real-world scenarios where Rakour's high voltage systems perform best.
For large residential properties, Rakour's home battery storage system provides seamless backup across all circuits — including HVAC, EV charging, and kitchen appliances. Paired with rooftop PV, the HV system prioritizes solar energy storage during daylight hours and discharges during peak-rate evening windows, reducing grid dependency and utility costs.
In commercial battery storage applications — factories, warehouses, retail facilities — Rakour HV systems absorb energy during off-peak hours and discharge during demand peaks. This directly reduces demand charges on commercial utility bills. Systems support TOU (time-of-use) scheduling, allowing operators to pre-program charge and discharge windows around their tariff structure.
Microgrids and energy storage are increasingly deployed in remote facilities, agricultural operations, and island communities. Rakour HV batteries support both on-grid and off-grid operation. Up to 4 sets can be connected in parallel, enabling multi-hundred-kWh microgrid configurations that pair with diesel generators or wind-solar hybrid generation for continuous, reliable power.
Whether you need 80 kWh today or 225 kWh next year, Rakour's HV architecture lets you add capacity without replacing what's already installed.
Rakour's HV series begins at 5 battery modules per string — delivering 80.38 kWh of total energy. Each additional 51.2V module added in series increases capacity incrementally. The 51.2V314Ah-HV supports up to 17 modules in a single string, reaching 225.08 kWh. This modular design means projects can start within budget and expand as load requirements increase over time.
For projects exceeding a single string's output, Rakour HV systems support up to 4 sets connected in parallel. This enables multi-string configurations exceeding 900 kWh in total capacity. Each parallel set maintains independent BCU management, ensuring balanced charge and discharge across all strings without cross-interference or capacity degradation between units.
Rakour HV modules mount using stackable sheet metal frames or a dedicated battery cabinet — both orderable through Rakour's distribution network. Modules stack vertically with a minimum 300 mm clearance around each unit for ventilation. The rack-and-frame system requires no special flooring and fits standard indoor mechanical rooms, reducing civil construction costs for commercial and residential installations.
The chemistry choice behind every Rakour HV battery — and why it matters for long-term safety, cycle life, and total cost of ownership.
Lithium iron phosphate (LFP) cells use an iron-phosphate cathode rather than nickel or cobalt compounds. This structural difference eliminates the oxygen-release mechanism responsible for thermal runaway in NMC and NCA chemistries. LFP cells remain chemically stable even under overcharge, short circuit, or mechanical stress — making them the correct choice for high-voltage series configurations where cell-level failures can cascade rapidly.
Rakour's 51.2V314Ah-HV achieves ≥8,000 charge-discharge cycles. The 51.2V280Ah-LV reaches ≥10,000 cycles, and the 314Ah-LV variant exceeds ≥11,000 cycles. At one cycle per day, the higher-tier models represent over 27 years of daily operation. This directly reduces replacement frequency, lowers lifetime cost per kWh delivered, and supports bankability for commercial energy storage projects requiring long warranty coverage.
Rakour LFP modules discharge from −20°C to 60°C — ensuring reliable performance in cold climates without thermal derating. LFP chemistry carries no memory effect, meaning cells can be charged and discharged at any state-of-charge without capacity loss from partial cycling. This flexibility suits time-of-use optimization strategies where charge depth varies daily based on grid tariff windows.
A breakdown of the hardware protections, installation safeguards, and international certifications built into every Rakour HV battery system.
Every Rakour HV system runs a dual-layer protection structure. The slave BMS inside each 51.2V module monitors individual cell voltage and temperature in real time. The master BMS within the BCU consolidates this data and enforces system-level responses — triggering automatic cutoff for overcharge, over-discharge, over-current, and both high and low temperature fault conditions before damage occurs.
Beyond software protection, Rakour's BCU integrates a DC fuse, a hard cut-off protection switch, and a soft-start circuit. The soft-start circuit limits inrush current at system startup — a critical feature for lithium iron phosphate fire hazards prevention in high-voltage configurations. The mounting carrier must be fire-resistant per installation guidelines, and all systems require proper grounding to prevent electric shock risk during operation or fault events.
All Rakour HV batteries carry CE marking and UN38.3 certification — required for international transport and electrical safety compliance. Select models additionally hold IEC62619 certification, the globally recognized standard for secondary lithium ion battery safety in stationary energy storage applications. These certifications are verified by independent third-party testing bodies, providing installers and end-users with documented evidence of product compliance before deployment.
Practical wiring, communication protocol, and inverter pairing information for installers configuring Rakour HV batteries in the field.
Rakour HV batteries communicate with inverters via CAN or RS485 protocol through a standard RJ45 port on the BCU. The BMS transmits real-time state-of-charge, voltage, current, and fault status directly to the inverter's BMS input port. The inverter then adjusts charging voltage, charging current, and discharge cut-off thresholds dynamically based on the data received — enabling fully automatic, self-managing operation without manual parameter intervention.
Rakour provides documented integration guides for Deye inverter models including the SUN-29.9K to SUN-80K-SG02HP3 series. For the 80K series, the BCU's P1+ and P2+ dual-output ports connect to the inverter's BAT1 and BAT2 input ports simultaneously — a parallel shunting configuration that increases effective discharge power while keeping current within each port's 50A limit, reducing system cost without additional hardware.
Rakour's built-in soft-start circuit inside the BCU allows the battery inverter to connect without requiring a native soft-start function on the inverter side. This broadens compatibility across multiple inverter brands beyond Deye. Communication settings are configured via the BCU touch screen or RS232 upper computer port, where installers can read and modify BMS parameters directly to match third-party inverter requirements for voltage range and protocol selection.
How Rakour's HV systems keep operators informed and in control — from the local touch screen to smartphone remote access.
Every Rakour HV BCU includes an external color touch screen that displays total system voltage, state-of-charge (SOC), current, and individual cell voltage highs and lows in real time. Operators can switch between day and night display modes, adjust screen brightness, and access engineering mode for detailed per-cell diagnostics — all without connecting a laptop or external device. Fault events are flagged directly on the home screen with alarm notifications.
Rakour's built-in Wi-Fi module connects to the PACEex monitoring app, available for smartphone. After Wi-Fi binding, operators can remotely view SOC, cell voltage balance, temperature readings, and cumulative charge and discharge capacity from any location. The battery monitoring system also supports remote parameter modification and OTA firmware upgrades — eliminating the need for on-site visits to adjust protection thresholds or update system configuration after initial commissioning.
For on-site commissioning without Wi-Fi infrastructure, Rakour systems also support Bluetooth local control through the same PACEex app. Additionally, the RS232 upper computer port allows direct PC connection via USB-CAN cable — enabling advanced parameter reading, BMS address configuration, and full diagnostic data export for installers managing multiple sites or documenting system performance for project commissioning records.
Real answers to the questions installers and buyers ask most about Rakour HV battery systems.
A single 51.2V314Ah-HV string supports up to 17 modules in series, totaling 225.08 kWh. Up to 4 strings connect in parallel for 900+ kWh combined. Each string has its own BCU.
Rakour HV batteries work with Deye SUN-29.9K to SUN-80K inverters via CAN or RS485. The built-in soft-start circuit supports inverters without native soft-start, broadening compatibility.
Rakour's dual-layer BMS monitors each cell via slave BMS and enforces system-level cutoff through the master BMS in the BCU — covering overcharge, over-discharge, over-current, and temperature faults.
All Rakour HV batteries carry CE and UN38.3 certification. Select models also hold IEC62619, the international standard for stationary lithium-ion battery safety, verified by independent testing bodies.
Yes. Rakour's built-in Wi-Fi connects to the PACEex app for remote SOC monitoring, cell voltage, temperature readings, parameter changes, and OTA firmware upgrades — all without requiring an on-site visit.
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