EG4 Electronics WallMount All Weather Lithium Battery
Product Overview
Image of the EG4 WallMount All Weather Lithium Battery: a tall, white rectangular unit with the EG4 logo on the front.
The EG4® WallMount All Weather 280Ah batteries are ideal for low-voltage residential outdoor energy storage system (ESS) applications. The batteries utilize lithium iron phosphate cells with the highest safety performance and an intelligent Battery Management System (BMS). The BMS monitors and records the voltage of each cell, along with the current, voltage, and temperature of the module in real-time. It also includes a passive balance function and an advanced battery control method to enhance performance and longevity.
- BUILT-IN 200A BMS
- INTEGRATED 600A BUSBARS
- 82.6MWh LIFETIME PRODUCTION*
- 10 YEAR WARRANTY >8000 CYCLES @ 80% DOD
Key Features
On-Board LCD Touch Screen: Allows for easy BMS monitoring and selectable closed-loop communications with various inverters including EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower, and Deye.
Compact Footprint With Optimized Spacing: Outdoor installations require only 3 inches of side-to-side clearance and 0.75 inch front-to-back spacing between stacked units. Indoor installations require 6 inches of side-to-side clearance and 2 inches of front-to-back spacing, maximizing flexibility and space efficiency.
Dual On-Board Fire Arrestors: Provide fail-safe protection against thermal runaway.
Weather-Tight Quick Connects: Include outdoor-rated connectors for fast, safe, and reliable battery connections.
Integrated Self-Heating Feature: Heats the battery when the ambient temperature is low, a key feature for outdoor Lithium battery cell operations.
The Perfect Partner to the EG4 18kPV: The optional conduit box connects directly to the inverter's ports for a sleek installation. For other inverters or stand-alone battery installations, conduit box plugs should be installed.
For information regarding warranty registration on EG4® Electronics products, please navigate to https://eg4electronics.com/warranty/ and select the corresponding product to begin the registration process.
©2025, EG4® ELECTRONICS, LLC. ALL RIGHTS RESERVED. VER. 1.1.9 | INFORMATION SUBJECT TO CHANGE WITHOUT NOTICE. MODEL #: WP-16/280-1AWLL | WP-16/280-1-AWLL
[ETL Listed US]
Specification Sheet
Module Operating Parameters
| Parameter | BMS | Recommended Charger Settings |
|---|---|---|
| Total Energy Capacity | 14.3kWh @25C, 100% SOC | - |
| Voltage | 51.2V | - |
| Capacity | 280Ah ±2% | @25°C ±2°C @ 0.5C |
| Charging Voltage (Bulk/Absorb) | 56.0V (±0.8V) | 56.2V (±0.2V) |
| Float | - | 54V (±0.2V) |
| SOC Cutoff | - | 20%* |
| Charge Current | 140A Max. Continuous | 60 - 140A |
| Discharge Current | 140A Max. Continuous | 60 - 140A |
BMS Parameters
Charge
| Spec | Delay | Recovery | |
|---|---|---|---|
| Cell Voltage Protection | 3.8V | 1 sec | 3.45V |
| Module Voltage Protection | 60V | 1 sec | 55.2V |
| Charge Over-Current 1 | >205A | 10 sec | - |
| Charge Over-Current 2 | >225A | 3 sec | >32°F or <140°F (>0°C or <60°C) |
| Temperature Protection | <23°F or >158°F (<-5°C or >70°C) | 1 sec | >32°F or <140°F (>0°C or <60°C) |
Discharge
| Spec | Delay | Recovery | |
|---|---|---|---|
| Cell Voltage Protection | 2.3V | 1 sec | 3.1V |
| Module Voltage Protection | 44.8V | 1 sec | 48V |
| Discharge Over-Current 1 | >205A | 10 sec | 60 sec |
| Discharge Over-Current 2 | >300A | 3 sec | 60 sec |
| Short Circuit | >600A | <0.1 ms | - |
| Temperature Protection | <-4°F or >167°F (<-20°C or >75°C) | 1 sec | >-14°F or <149°F (>-10°C or <65°C) |
| PCB Temperature Protection | >230°F (>110°C) | 1 sec | @ <176°F (<80°C) |
General Specifications
| Parameter | Spec | Condition | |
|---|---|---|---|
| Cell Balance | 120mA | Passive Balance | Cell Voltage Difference >40mV |
| Temperature Accuracy | 3% | Cycle Measurement | Measure Range: -40°F ≈ 212°F (-40°C ≈ 100°C) |
| Voltage Accuracy | 0.5% | Cycle Measurement | Cells & Module |
| Current Accuracy | 3% | Cycle Measurement | Measure Range: -200 - 200A |
| SOC | 5% | Integral Calculation | - |
| Power Consumption (Standby) | <300uA | Standby/Storage | - |
| Power Consumption (Operating) | <25mA | Charging/Discharging | - |
| Communication Ports | RS485/CAN | Customizable | - |
*EG4 recommends this value be set no lower than 20% to maintain the recommended 80% depth of discharge.
Battery Heater Specifications
| Parameter | Spec | Condition |
|---|---|---|
| Voltage | 56V | - |
| Power Consumption | 224W | Heat On/Heat Off |
| Internal Battery Temperature | ≤32°F (0°C) or ≥41°F (5°C) | - |
Environmental Parameters
| Parameter | Range | Condition |
|---|---|---|
| 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) | - |
| Operating Altitude | <16404 ft. (<5000 m) | - |
| Ingress Protection | IP65 | - |
Physical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Dimensions (H x W x D) | 36.2 x 20.2 x 9.1 | in. (92 x 51.2 x 23.2 cm) |
| Weight | 308.6 | lbs. (140 kg) |
| Design Life | >15 years | - |
| Cycle Life | >8000 Cycles @ 0.5C 80% DOD | - |
| Lifetime Production | 82.6MWh** | - |
Safety Certifications
| Certifications |
|---|
| UL1973, UL9540A (Passed) |
** (51.2V×280Ah/1000×80%×8000 cycles/1000)90%=MWh
Changelog
Version 1.1.9: Modified first page to better reflect updated spacing requirements.
Version 1.1.8: Modified operating altitude into environmental parameters.
Version 1.1.7: Modified the 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 60 – 140A; Modified temperature range for charge range, discharge range, and storage range; Modified short circuit spec from 2000A to >600A; Modified short circuit delay from 0.1 ms to <0.1 ms.
Version 1.1.6: Modified recommended charging current from 60 – 160A to 60 – 140A.
Version 1.1.5: Added operating altitude range value.
Version 1.1.3: Added additional safety certification.
Version 1.1.0: Reformatted document to match template standards; Adjusted the short circuit current rating from 600A to 2000A.
Version 1.0.2: Added Total Energy Capacity to table.
Version 1.0.1: Added QR Codes.
Version 1.0.0: First revision of spec sheet.
