If they plan on continuing to sell the batteries having issues, their issues will continue to multiple, along with more dissatisfied customers showing up.
I would NOT recommend the EG4 LifePower4 to anyone that isn't running Growatt style inverters.
I think the issue is in the BMS programming for when and/or how long the pre-charge circuit is utilized. You failed to test changing that parameter with
@Koldsimer, you mentioned it wouldn't take the setting or something. You failed to update the firmware supplied by the China man. It sounds to me like you have a serious BMS issues in these batteries, when you, the exclusive dealer for them, can't update firmware or make BMS parameter changes. Not being able to reproduce it yourself is certainly a huge issue. You should take any opportunity you have with customers to aggressively work the issue with setting changes, firmware, etc.
You now KNOW due to you swapping the EG4 LL batteries out with
@Koldsimer "good move by the way", that the LL batteries solve the issue. WHAT IS DIFFERENT IN THEM? Look at the parameter difference on pre-charge timing and how they work. Pre-charge resisters the same? etc etc.... FIND THE DIFFERENCE!
Upper management has a very tough decision to make, since this isn't resolved and there is new people showing up every day stating they have the same issues with them. And more importantly the manufacture unable to supply you with a fix or even a working firmware upgrade or way to troubleshoot.
Signature Solar could:
1. Roll the dice, keep selling them. Risk ruining your reputation selling batteries with known issues "It will hurt more than your LifePower4 battery sales, people will be afraid of all of your batteries and products"... You and your support team will spend countless hours beating around the bush about an issue that you know about and can't fix. Eventually many will demand a refund and you SHOULD pay for return shipping in these cases, costing you thousands of $$$. You then will have a stack of used batteries to do something with.
2. Stop sale of them until resolved. Put pressure on the China Manufacture threatening to return them if they don't provide you with at least working firmware and a way to troubleshoot. You guys no doubt have spend hundreds of thousands $ with this company, sounds like they aren't providing the level of support your business relationship warrants.... It's a show of good faith by stopping sell until resolved or at a min put a disclaimer up that they may have issues starting non-growatt inverters. It will slow the support issues and returns down, giving you more $ and bandwidth to work on the issues.
Good luck and I do you hope you solve this. I've been here since the beginning of this thread. I was lucky enough to read
@Koldsimer having issues with my exact inverter in time to get my order of EG4 LifePower4 switched to EG4 LL batteries. It cost me $750 to avoid this problem.... Not the solution I wanted, but I chose it over going thru the hell he did.
However, if it is your phone, my fat fingers are sympathetic.
