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EG4 LL V2 Lithium 12V 400AH Server Rack Battery | Signature Solar

EG4 LL Lithium Battery (V2) | 12V 400AH | Server Rack Battery

$1,299.00
$253.71 / Kilowatt-hour

SKU:
1511054
Nominal Voltage:
12.8V
Nominal Capacity:
400AH
Kilowatt-hour(s):
5.12kWh
Dimensions:
17.4 x 18.5 x 6.1 in
Design Life:
15 Years at 80% DoD
Communications:
RS485/CAN: Victron, EG4
Warranty:
Spec Sheet:
Manual:
BMS Software:
Interfacing Guide:

EG4 LL Lithium Battery (V2) | 12V 400AH | Server Rack Battery

Upgraded EG4-LL (Lifetime Lithium) Lithium Iron Phosphate battery 12.8V (12V) 5.12kWh with 200A internal BMS, based on the same subset features of the previous industry renowned EG4-LL Battery.

Composed of (16) UL listed prismatic 3.2V cells which have been tested at 7,000 deep discharge cycles to 80% DoD - fully charge and discharge this battery daily for over 15 years without issue. Reliable and rigorously tested, with a 99% operating efficiency. Includes an LCD screen to quickly view your batteries' most important information, but now features Selectable closed-loop inverter communications including Victron, and EG4! A simple plug-and-play interface that has all the essentials built in for easy setup.

Key Features:

EG4 Lifetime Lithium, Best In Class Solar Rack Battery

  • Rated for 7000 deep charge & discharge cycles
    • 15-year life with 80% depth of discharge daily, designed for up to 20-year life
  • Tier One, A+ Cell Composition, 99% Efficiency LiFePo4 16-Cell Pack
  • #1 Energy Density Server Rack Battery Form Factor
  • Dual Onboard automatic fire arrestors
    • Failsafe operation in high-risk environments and to protect against rare
      hardware failure on high voltage solar charge controllers!
  • Parallel up to 16 batteries
    • Get the most power possible! Up to 80kWh while maintaining BMS
      communications!

Advanced Configurability

  • On-board LCD Screen
  • PC Monitoring Software
  • Lifetime firmware updates

Reliability & Safety Testing

  • Dual On-board Fire Arrestors
  • Environmentally Friendly & Lead-Free
  • Design Optimized and Tested by EG4's R&D Solar Laboratory. In-House & Texas Based
  • 10-Year Warranty Supported and serviced out of Texas

Included:
(1) 1 foot RS485 Communication Cable and (1) Set of Parallel Cables per battery 
(1) RS485 USB Battery Comm Cable PER (6) BATTERIES (shipped separately)

Nominal Voltage:
12.8V
Nominal Capacity:
400AH
Kilowatt-hour(s):
5.12kWh
Dimensions:
17.4 x 18.5 x 6.1 in
Design Life:
15 Years at 80% DoD
Communications:
RS485/CAN: Victron, EG4
Warranty:
Spec Sheet:
Manual:
BMS Software:
Interfacing Guide:
10-Year Warranty
Customer Reviews
5.0 Based on 29 Reviews
5 ★
97% 
28
4 ★
3% 
1
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
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D
03/17/2025
Dwight
United States

LL-S review

I received an LL-S as a warranty upgrade. my original LL-2V had a bad cell and these had just come out..... I love everything about it.... the touch screen lets me see the cells are balancing. I do disconnect my panels once a month and let the battery cycle down as living in southern Arizona I'm never under 50%. battery cycles down and shuts off at 19% each month no problem..... glad I paid a little extra and got the display

DG
03/16/2025
David G.
United States

Very well designed

As a technician I really like the design of the rack and easy way to assemble the batteries.

Signature Solar EG4 LL Lithium Battery (V2) | 12V 400AH | Server Rack Battery Review
AL
02/13/2025
Alan L.
United States

Good batteries

The EG4 LL-s batteries work well so far.

AD
02/07/2025
Andrew D.
United States

Good batteries!

Excellent batteries for a decent price!

MG
01/31/2025
Marvin G.
United States

response to shortage from factory.

Sig Solar responded without hesitation to replace missing items in each box containing the EG4LL batteries. Very good start in working with Sig Solar.