EG4-LL 12V 400Ah (V2) Server Rack Battery

SKU: 1511054


  • Nominal Voltage: 12.8V
  • Nominal Capacity: 400Ah
  • Kilowatt-hour(s): 5.12kWh
  • Dimensions: 17.4″ x 18.5″ x 6.1 inches
  • Operating Power Consumption: < 14mA
  • Temperature Protection
  • Cell & Module Voltage Protection
  • Short Circuit Protection: > 775A < 0.1 mS
  • PC Monitoring Software Included
  • Lifetime firmware updates

12 in stock




Discover the EG4-LL 12V 400Ah (V2) Server Rack Battery

The EG4-LL (Lifetime Lithium) 12V 400Ah Battery is a true innovation in energy storage solutions. This Lithium battery is  designed to meet your power needs with unparalleled efficiency and reliability.

Robust and Proven Performance 

Comprising 16 UL Listed prismatic 3.2V cells, tested at an impressive 7,000 deep discharge cycles to 80% depth of discharge (DoD) and an extraordinary 99% operating efficiency. This battery is capable of daily full charge and discharge for over 15 years without any issues.

Seamless Integration

A simple plug-and-play interface with all the essentials built-in, allowing for easy setup and hassle-free operation. Additionally, it now includes an LCD screen to provide quick access to essential battery information.

Versatile Compatibility 

This battery model offers selectable closed-loop inverter communications, making it compatible with a wide range of inverters. This battery will communicate with EG4, Schneider, Sol-Ark, Victron, and Growatt. 

Maximum Power and Expansion Capacity 

The EG4-LL Battery is designed for parallel connection with up to 16 batteries, providing scalability for projects of various sizes. Unleash up to 81.9kWh of power while maintaining efficient BMS communications.


Recommended Accessories:

Additional information

Weight 99 lbs
Battery Voltage

12 Volts DC


EG4 Electronics

Capacity (Amp-Hours)


Form Factor

19" EIA Server Rack

1 review for EG4-LL 12V 400Ah (V2) Server Rack Battery

  1. FifthExile (verified owner)

    I’m still a bit new to batteries and electrical etc so I Emailed a few questions to the current connected team, they were extremely helpful and fast responding.
    I was a little hesitant to buy from current connected at first since I couldn’t find any reviews etc besides a couple YouTubers suggesting them but after working with them I’d definitely come back.
    The server rack eg4 batteries were like $300 cheaper each which scared me cuz everyone else was way more expensive (I couldn’t stop thinking “they’re so cheap, what’s wrong with them?”) but I got the batteries and wired them together and everything worked so I guess everyone else was just being greedy.
    No programming, no computers, plug and play which is how stuff should be.
    If anything was programmed then current connected did all that before sending them to me.
    I tried to make a review months ago but the website here was bugging so maybe it was bugging for everyone else and that’s why there aren’t a lot of reviews.
    I’ll buy again. Definitely recommend.
    Batteries came well packaged via R&L freight carriers.

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