EG4 WallMount Indoor 280Ah Lithium Battery
Model Numbers: WM-48|280-LL-00 / WM-48-280-1-IN-LL-00
Product Overview
The EG4 WallMount Indoor 280Ah batteries are designed for low-voltage residential indoor energy storage applications. They utilize lithium iron phosphate cells for high safety and an intelligent Battery Management System (BMS) that provides real-time monitoring of cell voltage, module current, voltage, and temperature. The BMS includes passive balancing and advanced control methods to enhance battery pack performance.
Key Features
- Integrated 200A BMS
- Integrated 600A Busbars with multiple terminals (4 positive & 4 negative)
- 82.6 MWh Lifetime Production
- 10 Year Warranty >8000 Cycles @ 80% DOD
- On-board LCD Touch Screen for BMS monitoring and inverter communication (EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower, Deye)
- Dual On-board Fire Arrestors for thermal runaway protection
- Integrated Self-Heating Feature for cold temperature operation
- Innovative Emergency Stop Function (optional ESS disconnect)
- Designed to partner with EG4 Inverters, with optional conduit box for seamless installation
Technical Specifications
Module Operating Parameters
| Parameter | BMS Recommended Setting | Spec | Delay | Recovery |
|---|---|---|---|---|
| Total Energy Capacity | - | 14.3kWh @25°C, 100% SOC | - | - |
| Voltage | - | 51.2V | - | - |
| Capacity | - | 280Ah | - | - |
| Charging Voltage (Bulk/Absorb) | 56.2V (+/-0.2V) | 56.0V (+/-0.8V) | - | - |
| Float | 54V (+/-0.2V) | - | - | - |
| SOC Cutoff | 20%* | - | - | - |
| Charging Current | 60 – 140A | 140A (Max. continuous) | - | - |
| Discharging Current | 60 – 140A | 140A (Max. continuous) 200A (Max. continuous for 30 min) | - | - |
| BMS Parameters Charge | ||||
| Cell Voltage Protection | 3.45V | 3.8V | 1 sec | - |
| Module Voltage Protection | 55.2V | 60.0V | 1 sec | - |
| Over Charging Current 1 | - | >205A | 10 sec | - |
| Over Charging Current 2 | - | >225A | 3 sec | - |
| Temperature Protection | >0°C or <60°C | <-5°C or >70°C | 1 sec | >0°C or <60°C |
| BMS Parameters Discharge | ||||
| Cell Voltage Protection | 3.1V | 2.3V | 1 sec | - |
| Module Voltage Protection | 48V | 44.8V | 1 sec | - |
| Over-Charging Current 1 | 60 sec | >205A | 10 sec | 60 sec |
| Over-Charging Current 2 | 60 sec | >300A | 3 sec | 60 sec |
| Short Circuit | - | >600A | <0.1 mS | - |
| Temperature Protection | >-10°C or <65°C | <-20°C or >75°C | 1 sec | >-10°C or <65°C |
| PCB Temp Protection | @ <80°C | >110°C | 1 sec | @ <80°C |
*EG4 recommends this value be set no lower than 20% to maintain the recommended 80% depth of discharge.
General Specifications
| Parameter | Condition | Spec |
|---|---|---|
| Cell Balance | Passive Balance Cycle Measurement | Cell Voltage Difference >40mV |
| Temperature Accuracy | Measurement Cycle Measurement | 3% (Measuring Range -40°F to 212°F (-40°C to 100°C) for Cells & Module) |
| Voltage Accuracy | Measurement Cycle Measurement | 0.5% (For Cells & Module) |
| Current Accuracy | Cycle Measurement | 3% (Measuring Range -200A - 200A) |
| SOC | Integral Calculation | 5% |
| Power Consumption (Sleep & Off Mode) | Storage/Transport/Standby | <300uA |
| Power Consumption (Operating Mode) | Charging/Discharging | <25mA |
| Communication Ports | - | RS485/CAN (Can be customized) |
Battery Heater Specifications
| Parameter | Condition | Spec |
|---|---|---|
| Voltage | - | 56V |
| Power Consumption | - | 224W |
| Internal Battery Temperature | Heat On/Heat Off | 32°F (0°C) / 41°F (5°C) |
Environmental Parameters
| Parameter | Range |
|---|---|
| Charging Range | 32°F to 122°F (0°C to 50°C) |
| Discharging Range | -4°F to 131°F (-20°C to 55°C) |
| Storage Range | 32°F to 113°F (0°C to 45°C) |
| Ingress Protection | IP20 |
| Operating Altitude | <16404 ft. (<5000m) |
Physical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H×W×D) | 34.1 in. × 18.1 in. × 10.4 in. (865 mm × 460 mm × 264 mm) |
| Weight | 286.6 lbs. (130 kg) |
| Design Life | >10 Years |
| Cycle Life | >8000 cycles, 0.5C 80% DOD |
| Lifetime Production | 82.6 MWh** |
**Calculation: (51.2V × 280Ah / 1000) × 80% × 8000 cycles × 90% = MWh
Safety Certifications
- UL1973
- UL 9540A
Changelog
- Version 1.1.7: Added additional surge value for battery discharge, 200A for 30 minutes.
- Version 1.1.6: Adjusted operating altitude in environmental parameters from <2000m to <5000m.
- Version 1.1.5: Added operating altitude range to spec sheet. Modified the weight and dimensions of the unit. Modified Max. Continuous charging current from 200A to 140A. Modified Max. Continuous discharging current from 200A to 140A. Modified recommended discharging current from 160A to 60A – 140A. Modified temperature range for charge range, discharge range, and storage range.
- Version 1.1.4: Modified recommended max charge from 60 – 160A to 60 – 140A.
- Version 1.1.3: Replaced Low DC Cutoff with SOC Cutoff at 20% with a note under the table. Minor formatting changes.
- Version 1.1.2: Added 2 line items to the spec sheet notating Total Energy Capacity and Max Continuous Discharge Rate. Minor formatting changes. Greyscale image added to front page.
- Version 1.1.1: Changed verbiage on page 1 of the document. Added changelog.
- Version 1.1: Changed verbiage on page 1 of the document. Changed UL 9540A certification from (Testing) to (Passed).
- Version 1.0: First iteration of the completed Spec Sheet.
Warranty Information
For information regarding warranty registration on EG4 Electronics products, please visit https://eg4electronics.com/warranty/ and select the corresponding product to begin the registration process.
