The problem is only showing up in one system out of two thousand (per SS), so is a tolerable rate of "lemon". And the battery is still "good", usable with other inverters.
The problem is being reported for many brands of inverters (though works for most inverters of each brand) but only for one model battery. What happens if a new shipment of batteries to SS has a problem for 50% of systems, due to a parameter variation? You could suddenly be in financial trouble.
This isn't a one-off problem, since it has shown up for several customers with different tier-one inverters. Now is a time you can figure out what's going on, when it's not a big deal to address. Better to proactively find a solution, than to wait until it affects $3,000,000 worth of sales.
This could be reworded as "Why does Kolds 6848 not work with batteries that are shown to work on 100's of other 6848's?" This line of thinking (that it is ONLY the batteries at fault and there is nothing wrong with the system because it works with other batteries) can easily be reversed to (that it is ONLY his set up at fault and there is nothing wrong with the batteries because it works with the same model inverter in literally dozens of other systems). This line of reasoning just has no end - and so why can't we all agree to a better line of reasoning:
There is something about this users SPECIFIC setup, in addition to the use of the LifePower4 batteries, that is causing an issue.
If we adopt this line of thinking, instead of pointing fingers, possibly we can analyze and discover what is actually causing the problem. The reality of this line of thinking, however, does mean that DIYers (of any level whether they are building their own battery or using parts and building their own system) assume a level of risk in doing so. We, as the company selling the EG4 batteries, are happy to review any warranty return claims and fulfill them. The length of time this specific issue took is not normal for many reasons, both within our control, within the users control, and out of both of our control. I will try to get an official stance on this and publish it so consumers can make educated decisions.
1 - it's not really necessary for me to explain how you started your system in the context of that statement. I was merely correcting his statement that made it sound like you were not using our batteries the entire time without any additional issues beyond the initial startup. I wasn't "pretending not to know" how you started your system. That information was just irrelevant in the context.
2. How are we contradicting each other? The fact of the matter is - the batteries are not incompatible with a specific brand or model inverter. It is your specific 6848 that is having an issue, not the 6848 in general. That being said, if any SPECIFIC PERSON is having issues, we want to know so we can troubleshoot and fix the issue.
1. Good because we quite literally did this - there is a video of his specific batteries, that he returned working without any issues using the exact same brand and model inverter that he is.
If this battery started all Schneider inverters except Kold's, you could say the problem is with his inverter.
But, we understand a small number of users with half a dozen brands of inverter including Schneider, Outback, several others I don't remember are having the same problem.
Yes, the battery you got back from Kold started the Schneider you have.
Are you going to say all those customer's inverters are bad? Even though they all worked with different batteries?
Seems to me something about this model battery, or some instances of this battery, aren't quite compatible with a number of top-tier inverters.
It seems lithium batteries aren't quite compatible with these inverters without something extra. BMS may quit on inrush current, or relay contacts weld, or class-T fuses blow. The low internal resistance of lithium batteries means a precharge circuit is required for inverters with large capacitors banks. It is difficult to make that precharge circuit one size fits all. If it was designed to deliver 100A for 0.25 seconds and then fully turn on, would probably be fine. But that takes big parts, to handle a 5000W peak, 1250 Joule hit. Telling the inverter to hold off for a few seconds is the optimal fix, but apparently not always an option. External customized precharge circuit may be the only solution for some applications.
But what you really need to do is find out why this handful of inverters have a problem. It might be some parameter setting, and if you solve the problem for any one, you'll probably know how to solve it for all (all models where most work fine.)
