ROCKSOLAR 51.2V 100Ah Self-Heating Rack mount LiFePO4 Battery | 5.12kWh
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Description
Description
The ROCKSOLAR 51.2V 100Ah self-heating rack-mounted LiFePO4 battery provides 5.12kWh of nominal energy storage for compatible 48V-class solar and backup power systems. Its self-heating function, -20°C to 50°C operating temperature range, standard 19-inch rack format, integrated battery management system (BMS), LCD display and CAN/RS485 communication make it a practical building block for home, cottage and off-grid energy storage.
5.12kWh storage for solar and backup power
Store energy from a compatible solar power system and supply a compatible inverter when power is needed. Each battery module combines lithium iron phosphate cells, an enclosure and an intelligent BMS. The LCD shows voltage, current, temperature and state of charge, while the front-panel LEDs provide operating and alarm status.
- Self-heating function: supports cold-weather energy storage applications, with a rated operating temperature range of -20°C to 50°C.
- 51.2V nominal voltage and 100Ah capacity: 5,120Wh per module for 48V-class energy storage systems.
- Rack-mounted format: designed for a standard 19-inch battery cabinet, with mounting ears and carrying handles.
- Integrated BMS: monitors voltage, current and temperature, with cell balancing and protection functions.
- 100A maximum continuous charge and discharge: 50A charging current is recommended.
- CAN and RS485 communication: configurable inverter protocols and battery monitoring connections.
- Long cycle life: more than 6,000 cycles at 25°C, 0.5C and 80% depth of discharge, according to the technical specification.
- Expandable in parallel: the user manual supports up to 64 modules, subject to system design, configuration and installation requirements.
Certifications and standards
UL 1973; UL 9540A; CSA; UL 9540 Certified
Warranty
Backed by a 10-year manufacturer warranty.
Technical specifications
| Specification | Value |
|---|---|
| Chemistry | Lithium iron phosphate (LiFePO4 / LFP) |
| Nominal voltage | 51.2V (48V-class system) |
| Rated capacity | 100Ah |
| Nominal energy | 5.12kWh / 5,120Wh |
| Charging voltage | 56.0–57.0V |
| Discharge voltage limit | 44.8V |
| Maximum continuous charging current | 100A; recommended charging current: 50A |
| Maximum continuous discharge current | 100A |
| Operating temperature | -20°C to 50°C |
| Self-heating | Built-in self-heating function |
| Storage temperature | -20°C to 55°C; follow the manual's storage procedures |
| Dimensions (W × D × H) | 442 × 470 × 143.5mm (±2mm) |
| Weight | 43kg (±1kg) |
| Communication | CAN / RS485 |
| Displays | LCD screen; SOC, RUN and alarm LEDs |
| Cycle life | >6,000 cycles at 25°C, 0.5C, 80% DOD |
| Design life | >15 years at 25°C; design life is not a warranty period |
| Technical model reference | RSZRLVESS5KR-V3 |
| Certifications and standards | UL 1973; UL 9540A; CSA; UL 9540 Certified |
| Manufacturer warranty | 10 years |
What's included
- 1 × 51.2V 100Ah battery module with integrated BMS
- 2 × 25mm² power cables: one red and one black
- 1 × communication cable
- User manual
A compatible inverter and a suitable battery rack or cabinet are required separately for a complete installation.
Installation and system planning
Installation and maintenance must be performed by qualified personnel following the user manual and applicable local requirements. Verify inverter voltage range, communication protocol, cabling, protection devices and module addressing before connection. Plan for the 43kg module weight and the cabinet clearances specified in the manual.
This self-heating version has a rated operating temperature range of -20°C to 50°C. Follow the model-specific heating and charging instructions, and confirm the installation environment and inverter compatibility with ROCKSOLAR before ordering.
Frequently asked questions
Is this a 48V or a 51.2V battery?
The battery's nominal voltage is 51.2V. It belongs to the 48V-class LiFePO4 energy storage category. Confirm that the inverter supports the specified battery voltage and charging settings.
How much usable energy does it provide?
Nominal stored energy is 5.12kWh. Usable energy and runtime depend on depth of discharge, inverter efficiency, load, temperature and system settings. The published cycle-life test uses 80% depth of discharge but maximum discharge can be up to 95%.
Can I expand the storage capacity?
The manual describes parallel operation with up to 64 modules. A qualified installer must confirm the permitted configuration, matching modules, communication addressing, cable sizing and protective devices for your installation.
Does CAN/RS485 mean it works with every inverter?
Compatibility depends on the inverter model, supported protocol and correct settings. Refer to the protocol list and configuration instructions in the user manual, and confirm your inverter model with ROCKSOLAR.
Does this battery have self-heating?
Yes. This version includes a self-heating function and has a rated operating temperature range of -20°C to 50°C.
Downloads
The documents below are based on the original source specification. The self-heating feature and updated -20°C to 50°C operating range stated above apply to this version; the documents are pending the corresponding technical revision.
Explore 48V LiFePO4 batteries or browse batteries and charging equipment to plan your energy storage system.
Shipping & Returns
Shipping & Returns
- Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
- Returns: You may return or exchange products within 30 days of receiving your order. Items must be in original condition with proof of purchase.
- If your item is defective or damaged due to manufacturing issues, we’ll gladly replace it at no additional cost.
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Talk to Our Solar Experts
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