Specifications
- Brand: AKAIYAI
- Model: C-ESSAKY25K-H
- 26kWh High Voltage LiFePO4 Battery
- 256V Nominal Voltage, 100Ah CapacityBrand: AKAIYAI
- ≥6,000 Cycle Life (90% DOD)
- Modular 5.22kWh Pack Design (5 Packs)
- 50A Charge / 100A Discharge Current
- RS485/CAN/WiFi Communication
- Built-in Smart BMS & Multiple Safety Protections
- 5-Year Official Warranty
AKAIYAI 256V 100Ah 26kWh C-ESSAKY25K-H High Voltage LiFePO4 Battery – Overview
The AKAIYAI 256V 100Ah 26kWh C-ESSAKY25K-H High Voltage LiFePO4 Battery is a commercial-grade, rack-mounted energy storage system designed for high-voltage solar and backup applications. Featuring a modular 5.22kWh pack design (5 packs total), it offers a reliable 26kWh rated energy capacity and a long lifespan of ≥6,000 cycles at 90% Depth of Discharge (DOD). With integrated smart BMS protection, RS485/CAN communication for wide inverter compatibility, and a flexible design expandable from 20.8kWh to 52kWh, this battery delivers safe, scalable, and efficient power storage for demanding commercial installations.
Key Benefits
- 26kWh rated energy capacity with 23.49kWh usable energy (90% DOD).
- 256V nominal voltage with a voltage range of 228V to 284V.
- Long lifespan of ≥6,000 cycles (25°C, 0.5C, 90% DOD, 80% EOL).
- Supports 50A continuous charge and 100A continuous discharge current.
- Built with safe, reliable LiFePO4 chemistry.
- Modular 5.22kWh pack design for easy installation and expansion.
- Expandable from 20.8kWh up to 52kWh with additional modules.
- Equipped with a specially designed BMS and three-level over-current protection.
- RS485/CAN communication compatible with most mainstream inverter brands.
- Includes WiFi connectivity for smart monitoring.
- IP20 indoor protection rating with natural cooling.
- Compact and robust rack-mounted design weighing 262 kg.
- 5-Year Official Warranty for peace of mind.
This high-voltage battery is designed to connect with hybrid inverters and solar panels to build a dependable commercial energy storage system for peak shaving, load shifting, and backup power.
Technical Specifications
| Parameter |
Value |
| System Parameters |
| System Model |
C-ESSAKY25K-H |
| Number of battery packs |
5 |
| Rated voltage |
256 V |
| Charging / Discharging current |
50 A / 100 A |
| Usable energy (90% DOD) |
23.49 kWh |
| Rated energy |
26 kWh |
| Voltage range |
228 – 284 V |
| Weight |
262 kg |
| Cycle life |
≥6000 (25℃, 0.5C/0.5C, 90%DOD, 80%EOL) |
| Humidity |
10% – 95% RH |
| Communication |
CAN / RS485 / WiFi |
| Enclosure protection rating |
IP20 |
| Cooling |
Natural cooling |
| Operating Temperature |
-20 ~ 55℃ |
| Altitude |
<2000 m |
| Short circuit protection |
Yes |
| Over current protection |
Yes |
| Over charge/discharge protection |
Yes |
| Over voltage protection |
Yes |
| Under voltage protection |
Yes |
| Over temperature protection |
Yes |
| Certifications |
IEC62619 / CE / UN38.3, MSDS |
| Module Parameters |
| Module Model |
51A100KYS |
| Control box |
51A100PDU |
| Single Module Rated voltage |
51.2 V |
| Single Module Energy |
5.22 kWh |
| Single Module Net Size (L*W*H) |
540 * 492 * 168.5 mm |
| Single Module Packing Size (L*W*H) |
622 * 567 * 230 mm |
| Single Module Net/Gross Weight |
47.5 KG / 51.5 KG |
| Warranty |
5 Years, ≥6000 Cycles |
Ports & Interface Details
- Battery Module Ports: Power terminals for series connection between modules.
- Control Box: Central connection point for system output and communication.
- Communication: RS485 and CAN ports for inverter and BMS communication; WiFi for smart monitoring.
Advanced Technology
- LiFePO4 Chemistry: Delivers high thermal stability, safety, and a long cycle life of ≥6,000 cycles.
- Modular Design: 5.22kWh battery packs allow for easy installation and flexible capacity expansion from 20.8kWh to 52kWh.
- Intelligent BMS: Specially designed Battery Management System with three-level over-current protection ensures safe and reliable operation.
- Wide Inverter Compatibility: RS485/CAN communication protocol is compatible with most mainstream inverter brands in the market.
- Natural Cooling: Efficient thermal management without the need for active fans, reducing maintenance and energy consumption.
Installation & Scalability
The AKAIYAI Classic Cone series features a rack-mounted modular design that simplifies installation and operation. The system is scalable by adding 5.22kWh modules, allowing capacity to grow from a base of 20.8kWh up to 52kWh. It is designed for indoor installation with an IP20 rating and natural cooling, operating efficiently in temperatures from -20°C to 55°C. Ensure the installation location is dry, well-ventilated, and has sufficient load-bearing capacity for the 262 kg system weight.
Smart Monitoring & Control
- Real-Time Data: Monitor battery SOC, SOH, voltage, current, and temperature via compatible inverter platforms or dedicated monitoring systems.
- Smart O&M: RS485/CAN communication enables remote diagnostics and firmware updates.
- WiFi Connectivity: Supports wireless monitoring for easy access to system data.
- Alarm Management: Integrated BMS provides detailed protection and alarm reporting for proactive maintenance.
Frequently Asked Questions (FAQ)
Q1. What is the total rated energy capacity of the C-ESSAKY25K-H?
The system has a rated energy capacity of 26kWh, with 23.49kWh usable energy at 90% DOD.
Q2. What is the nominal voltage and voltage range?
The nominal voltage is 256V, with an operating voltage range of 228V to 284V.
Q3. What is the battery chemistry and cycle life?
It uses LiFePO4 chemistry with a cycle life of ≥6,000 cycles (25°C, 0.5C, 90% DOD, 80% EOL).
Q4. What is the maximum charge and discharge current?
The system supports 50A continuous charging and 100A continuous discharging current.
Q5. How many battery modules are included in this system?
The system comprises 5 battery modules, each with 5.22kWh capacity.
Q6. Can the system capacity be expanded?
Yes, the modular design allows expansion from 20.8kWh up to 52kWh by adding modules.
Q7. What communication protocols are supported?
It supports RS485, CAN, and WiFi for communication and monitoring.
Q8. Is it compatible with my existing inverter?
It is designed to be compatible with most mainstream inverter brands via RS485/CAN.
Q9. What is the ingress protection rating?
It has an IP20 rating, suitable for indoor installation.
Q10. What is the operating temperature range?
The operating temperature range is -20°C to 55°C.
Q11. Does it have built-in safety protections?
Yes, it features a specially designed BMS with short circuit, over-current, over-charge/discharge, over-voltage, under-voltage, and over-temperature protections.
Q12. What is the weight of the full 26kWh system?
The complete system weighs 262 kg.
Q13. What certifications does the battery have?
It is certified with IEC62619, CE, UN38.3, and MSDS.
Q14. What is the single module size and weight?
Each 5.22kWh module measures 540 x 492 x 168.5 mm and weighs 47.5 kg.
Q15. What warranty does it have?
It comes with a 5-year official warranty with a cycle life guarantee of ≥6000 cycles.
Download Datasheet | For manufacturer details, see the official page: AKAIYAI C-ESSAKY25K-H
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