Let's talk server rack battery BMS replacement

[priorityelec]

So I've got a bunch of EG4 server rack batteries. They're awesome. Work great. My one worry down the line is one of the bms's going out. Signature solar does not sell the bms by itself. I've asked. I'm sure I'm not the only one wondering how to replace the bms should one of mine die. Other than just finding a 48v 16s 100amp bms, can we find one that is a drop in replacement that uses the same connector the eg4 battery uses?

I have watched a lot of youtube videos and read lots of forum posts over the past few years but nobody that I watch talks about the connectors on the bms. If I needed to buy a new bms how would I connect the new bms to the current cells? Would I have to solder them on or is there a simple plug to unplug from the broken bms and plug into the fancy new bms? What do you all you guys do?

 

[wpns]

Why borrow trouble? If the BMS fails in five years, you have a warranty issue with EG4, if they are out of business, you look at the available BMS options at that time, and select your best option.

There may or may not be a connector compatibility issue with the BMS options today. There may or may not be a connector compatibility issue with the BMS options available in five years. Worst case, you will have to splice the new connector to your existing sense wires and redo the power connections, but that is as true today as it is five years from now.

#I’llBurnThatBridgeWhenIComeToIt

 

[Pilot1ce]

Just got this email regarding EG4 replacement BMS

 

[Pilot1ce]

"
Introducing EG4 BMS Replacements
EG4 BMS Replacements will soon be available, allowing customers with both legacy
and current batteries to keep a backup BMS on hand for quick and easy replacement if
needed. Having spare components readily available helps minimize downtime, avoid
costly shipping for repairs, and ensure continued energy reliability.
Designed for straightforward installation using common tools and our step-by-step
guide, these replacements provide peace of mind for those who want to be ready for
the unexpected.
Ideal for:
• Emergency replacements if the original BMS fails
• Keeping essential backup components for energy system reliability
• Refurbishing older battery systems
• Installers, maintenance facilities, and repair shops
Warranty:
3 Years – Does not void battery’s remaining warranty coverage when installed.
Target Launch Date:
April 2025
Replacements available:
• GyLL 24V
• GyLL 48V
• EG4 LL v1 12V
• EG4 LL v1 24V
• EG4 LL v1 48V
• LifePower4 v1 12V
• LifePower4 v1 24V
• LifePower4 v1 48V
• EG4 LL v2 24V
• EG4 LL v2 48V
• EG4 LL-S 48V
• LiFePower4 v2 24V
• LiFePower4 v2 48V
• WallMount Indoor 280Ah
• WallMount All Weather 280Ah"

 

[wpns]

Just got this email regarding EG4 replacement BMS

Oh, nice! Put me down for one, pending price.