EG4 WallMount Indoor 280Ah Lithium Battery

Why the EG4 WallMount Battery Is on the Homestead

When I started planning my off-grid solar setup, space was a real concern. I needed serious capacity but did not want to dedicate an entire outbuilding to batteries. The EG4 WallMount Indoor 280Ah Lithium Battery solved that problem perfectly. This 48V LiFePO4 battery mounts right on the wall, delivering 14.3kWh of storage in a compact footprint. I run multiple units in parallel on my system, and the integrated self-heating means they perform reliably even during cold Texas mornings.

What Is the EG4 WallMount 280Ah Battery?

The EG4 WallMount Indoor 280Ah is a high-capacity 48V lithium iron phosphate (LiFePO4) battery designed for indoor energy storage. With 14.3kWh of usable capacity and a 200A continuous output, it handles everything from daily cycling to backup power during extended cloudy periods. The built-in 200A Battery Management System (BMS) protects against overcharge, over-discharge, and temperature extremes. UL 1973 and UL 9540A certifications mean it meets rigorous safety standards for residential installations.

• Voltage: 51.2V nominal (48V system)
• Capacity: 280Ah
• Energy Storage: 14.3kWh
• Continuous Output: 200A
• Cycle Life: 8000+ cycles at 80% depth of discharge
• Warranty: 10 years

Key Features and How I Use It

On my homestead, I use the EG4 WallMount batteries as my primary energy storage bank. They pair directly with my EG4 12000XP inverters, and the closed-loop communication ensures optimal charging and discharging. The LCD touchscreen on the front makes it easy to monitor state of charge, voltage, and current without pulling up the app. When I need more capacity, I simply add another unit in parallel – the system scales cleanly up to multiple batteries working together.

Specifications

• Total Energy Capacity: 14.3kWh
• Nominal Voltage: 51.2V
• Capacity: 280Ah
• Charging Voltage (Bulk/Absorb): 56.0V to 56.2V
• Float Voltage: 54V
• Max Charging Current: 200A continuous
• Max Discharging Current: 200A continuous (140A recommended)
• Dimensions (H x W x D): 36.4 in x 18.1 in x 9.6 in (925mm x 460mm x 245mm)
• Weight: 282 lbs (128 kg)
• Operating Temperature: 32 F to 122 F (0 C to 50 C) charging, -4 F to 131 F (-20 C to 55 C) discharging
• Ingress Protection: IP20 (indoor use)
• Certifications: UL 1973, UL 9540A, UL 9540 (with EG4 18kPV)

Installation Tips

• Mount to wall studs using the included bracket – this battery weighs 282 lbs
• Leave at least 6 inches of clearance on all sides for ventilation
• Use proper torque on all terminal connections: 60 in-lb for EG4 battery terminals
• Set your inverter or charge controller to LiFePO4 mode with 56.2V bulk/absorb
• Enable the self-heating function if installing in an unheated space
• Connect communication cables (RS485 or CAN) for closed-loop operation with EG4 inverters
• When paralleling multiple units, use busbars and equal-length cables for balanced current

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