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EG4-WallMount Indoor Battery 280AH | Signature Solar

EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty

$3,699.95
$3,299.00
$230.70 / Kilowatt-hour

Currently  out of stock
This product is out of stock due to high demand.

Expected to arrive late June. 


SKU:
1511092
Kilowatt-hour(s):
14.3kWh
Spec Sheet:
Quick Start Guide:
COC (UL 1973):
COC (UL 9540):
Test Verification of Conformity (UL 9540A):

EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty

The WallMount Indoor 14.3kWh batteries are ideal for low-voltage residential indoor energy storage applications. The batteries use lithium iron phosphate cells with the highest safety performance and an intelligent Battery Management System (BMS) that can monitor and record the voltage of each cell along with the current, voltage, and temperature of the module in real-time. The BMS also contains a passive balance function and an advanced battery control method, both of which improve the performance of the battery pack.

Key Features:

ON-BOARD LCD TOUCH SCREEN
Easy to see BMS monitoring, and selectable closed-loop communications with EG4, Schneider, Sol-Ark, Victron, Growatt, Megarevo, Luxpower, and Deye inverters.

DUAL ON-BOARD FIRE ARRESTORS
Offer fail-safe protection against thermal runaway.

INTEGRATED SELF-HEATING FEATURE
Internal heating keeps cells operating during cold temperatures.

INTEGRATED BUSBARS
The battery design comes manufactured with 600A internal busbars with multiple terminals (4 positive & 4 negative) eliminating the need for external busbars when paralleling batteries and/or multiple inverters.

INNOVATIVE EMERGENCY STOP FUNCTION
The optional ESS disconnect can shut down all batteries and inverters (if equipped with rapid shut down capability) with the press of a button.

THE PERFECT PARTNER TO EG4 INVERTERS
The optional conduit box mates up directly to the connection ports of EG4 inverters allowing a sleek and efficient installation. For other inverters or stand-alone battery installation, the conduit box plugs should be installed.

Module Operating Parameters

  • Voltage: 51.2V
  • Total Energy Capacity: 14.3kWh
  • Capacity: 280Ah
  • Charging Voltage (Bulk/Absorb): 56.0V (+/-0.8V) to 56.2V (+/-0.2V)
  • Float Voltage: 54V (+/-0.2V)
  • Low DC Cutoff: 44.8V (adjustable start from 47V to 45.6V)
  • Charging Current: Up to 200A (continuous), recommended range: 60A - 160A
  • Discharging Current: Up to 200A (continuous), recommended: 160A

Environmental Parameters

  • Charging Range: 32°F to ≈113°F (0°C to ≈45°C)
  • Discharging Range: -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

Charging/Discharging Protection

  • Overcharging Protection: >205A (10 sec), >225A (3 sec)
  • Temperature Protection: <23°F or >158°F (1 sec), <-5°C or >70°C (1 sec)

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)
Kilowatt-hour(s):
14.3kWh
Spec Sheet:
Quick Start Guide:
COC (UL 1973):
COC (UL 9540):
Test Verification of Conformity (UL 9540A):
10-Year Standard Warranty
Customer Reviews
4.9 Based on 36 Reviews
5 ★
97% 
35
4 ★
0% 
0
3 ★
3% 
1
2 ★
0% 
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1 ★
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R
06/08/2025
Rob
United States

10 Months in - GREAT

Installed in SEPT 24 in my pumphouse/shed. Easy to set up, wire, and has been rock solid reliable so far. Installed with 18kPV and a pallet of 400W modules. My battery is secured to wall, but most of the weight remains on the 4 adjustable feet on concrete floor (much easier than hanging and works for my location. Note that manufacturer recommends discharging to 20% state of charge for best longevity, so keep that in mind as you figure usable capacity. Functionally I figure I get over 11kWh of usable capacity and may add a second battery in the future, would definitely consider matching unit over mix-and-match brands as paralleling two is made super simple with the parallel wiring kit and push-in high amp connectors.

TJ
05/31/2025
Thomas J.
United States

These batteries are great.

I've had 6 of the EG4 Indoor Wall Mount batteries storing my excess solar during the day and running the house at night/providing backup for grid outages. The batteries are well made, look good and just work. They have been running flawlessly for the past 8 months. Unfortunately, I can't say the same about the EG4 18kPV inverter.

Signature Solar EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty ReviewSignature Solar EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty Review
DM
05/09/2025
Donald M.
United States

Excellent product

Smart, powerful battery with good support

Signature Solar EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty Review
SG
05/05/2025
SAM G.
United States

So far it seems to be great

It's real heavy but comes in a wooden shipping box so it was well protected. Easily connected it to my Flexboss 18 with the provided cables. Seems to be working great so far. Makes sure you order the indoor conduit tray not the outdoor one as it does not fit properly on this battery.

Signature Solar EG4-WallMount Indoor Battery | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A | 10-Year Warranty Review
GS
04/29/2025
GARFIELD S.
United States

5 star review ✨️

It was a great experience and I was very happy.