EG4 | WallMount Indoor Battery 280AH | 51.2V | Indoor | Heated UL1973, UL9540A

WallMount Indoor Battery 280Ah | 51.2V | Heated | UL1973 & UL9540A Certified

Engineered for safe, efficient, and scalable energy storage, the WallMount Indoor 14.3kWh Battery is an advanced low-voltage solution designed for residential indoor installations. This 51.2V battery uses high-performance lithium iron phosphate (LiFePO4) cells and features an intelligent Battery Management System (BMS) that actively monitors each cell’s voltage, current, and temperature in real time.

Ideal for homes looking to enhance energy resilience and reduce grid dependence, it integrates seamlessly with multiple inverter brands and provides robust safety and control features to maximize performance and lifespan.

Key Features

On-Board LCD Touch Screen

View live system data and customize settings. Select closed-loop communications with EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower, and Deye inverters.

Dual On-Board Fire Arrestors

Enhanced safety with built-in fire suppression features to prevent thermal runaway risks.

Integrated Self-Heating Function

Heated cell design ensures performance even in cold-weather environments by maintaining optimal internal temperature for charging.

Integrated 600A Busbars

Eliminates the need for external busbars when connecting multiple inverters or batteries. Features 4 positive and 4 negative terminals for easier parallel installation.

Emergency Stop Function

An optional ESS disconnect switch allows you to shut down all batteries and inverters equipped with rapid shutdown capability—ideal for safety compliance and emergency scenarios.

EG4 Inverter Ready

Pair perfectly with EG4 inverters using an optional conduit box that directly connects to the inverter ports. Plug inserts are included for non-EG4 setups.

Specifications

Module Operating Parameters

• Voltage: 51.2V

• Total Energy Capacity: 14.3kWh

• Capacity: 280Ah

• Charging Voltage: 56.0V – 56.2V (Bulk/Absorb)

• Float Voltage: 54V

• Low DC Cutoff: 44.8V (adjustable: 45.6V – 47V)

• Charging Current: Up to 200A (continuous); Recommended: 60A–160A

• Discharging Current: Up to 200A (continuous); Recommended: 160A

Environmental Ratings

• Charging Temperature: 32°F to ≈113°F (0°C to ≈45°C)

• Discharging Temperature: -4°F to ≈122°F (-20°C to ≈50°C)

• Storage Range: -4°F to ≈122°F (-20°C to ≈50°C)

• Ingress Protection: IP20 (Indoor Use Only)

Protection Features

• Overcharge Protection: >205A (10 sec), >225A (3 sec)

• Temperature Protection: <23°F or >158°F (1 sec) / <-5°C or >70°C (1 sec)

What's Included

• (1) EG4 WallMount Indoor 280Ah
  
• (1) Mounting Bracket*
  
• (2) Red power cables 2/0 AWG (39.4 in.)
  
• (2) Black power cables 2/0 AWG (39.4 in.)
  
• (6) Concrete Expansion Bolts
  
• (1) Battery to Inverter Communication Cable

Specifications and Manuals

Click Here to Open Specification Sheet

General Specifications

• Communication Ports: RS485/CAN Can be customized
• Cycle Life: >8000 Cycles, 80% Depth of Discharge (DOD)
• Design Life: Over 15 Years
• Weight: 282.2 lbs. (128 kg)
• Safety Certifications: UL1973, UL 9540A (Testing)

Quick Start Guide
COC (UL 1973)
COC (UL 9540)
Test Verification of Conformity (UL 9540A)

Warranty

10-Year Warranty

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Warranty Registration and Validity

Your warranty must be registered within the first year of purchase or you must provide proof of purchase from Solar Guys Pro, an EG4 authorized distributor, for it to remain valid. Failure to register or provide proof of purchase may result in an invalidated warranty. This limited warranty applies to the original purchaser and is transferable one time only if the product remains in the original installation location. All parts exchanges are covered during the warranty period, but replacement shipping charges may apply outside the continental US.

Warranty Exclusions: EG4 Electronics is not obligated under this limited warranty for products subjected to the following conditions (including but not limited to):

1) Damages incurred during installation, reinstallation, or removal
2) Poor workmanship by an individual, installer, or firm
3) Damages from mishandling or inappropriate environmental exposure
4) Damages from improper maintenance or operating outside specified conditions
5) Tampering, altering, or disassembly of the product
6) Using the product in unintended applications
7) Damages from lightning, fire, flood, earthquake, riots, or acts of God
8) Products with altered, defaced, or removed serial numbers
9) Unauthorized firmware updates, upgrades, or patches
10) Damages from voltage or current spikes due to open-loop lithium battery communications

EG4 product warranty is a limited warranty – EG4’s liability in the event of a product defect is limited to repair or replacement under the terms of this warranty. EG4 is not responsible for any additional or indirect damages arising from the product malfunction. This includes incidental or consequential damages, such as loss of revenue, profits, or time. EG4 is not liable for any direct or indirect loss of life, bodily injury, illness, or death arising from misuse or mishandling of the product, whether caused by negligence or otherwise.

Return Policy

For returns, please contact us at: 571-350-0146 or email us at: info@solarguyspro.com. To view our return policy, please go: HERE

Warranty Claims Procedure

To initiate a warranty claim, contact our customer service team via phone at 571-350-0146 or email at info@solarguyspro.com to request an RMA. Warranty claims can also be initiated through the official EG4 website (https://eg4electronics.com/warranty).

Contact Information:
- Email: info@solarguyspro.com
- Phone: +1571-350-0146

Warranty Periods

- Inverters:
  - 10 years on 18kPV
  - 3 years (5 years extended warranty with EG4 batteries) on 3k, 6k, 6.5k, and 8k
- Batteries:
  - 10 years on LL
  - 5 years on LifePower (10 years extended when used with 18kPV)
  - 5 years on waterproof
  - 5 years on indoor wall mount
  - 10 years on outdoor wall mount
- Mini Split Air Conditioning:
   - 5 years on EG4 Hybrid AC/DC 12K BTU Mini Split
   - 5 years on EG4 Hybrid AC/DC 24K BTU Mini Split
   - 5 years on EG4 9K AC Mini Split
   - 5 years on EG4 12K AC Mini Split