i've had this battery a few months now and even after the update last week I have not seen this error. worth a heads up to those who have this battery installed.
-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Ohmmu Battery & 2020.28.6 update
- Thread starter lUtriaNt
- Start date
Oh this is simply brilliant.
Recent discussion here: What's with the Ohmmu 12V battery?
In that thread, some people eventually questioned if the internal management of the Ohmmu might ever conflict with Tesla's expectations that the 12V is just a dumb 12V battery. It seems like that may have actually happened now?
Recent discussion here: What's with the Ohmmu 12V battery?
In that thread, some people eventually questioned if the internal management of the Ohmmu might ever conflict with Tesla's expectations that the 12V is just a dumb 12V battery. It seems like that may have actually happened now?
yeah... installing an aftermarket battery with a TOTALLY different chemistry into a car where the system thinks it's an AGM battery... probably not so smart
that email came from the ohhmmu company.
ive been driving daily since the update and went to long beach last weekend (i live in LA). did not have any issues.
im not too concerned about it but i felt it was worth making a thread about it in case some people dont get the email.
ive been driving daily since the update and went to long beach last weekend (i live in LA). did not have any issues.
im not too concerned about it but i felt it was worth making a thread about it in case some people dont get the email.
We have that error and have had an Ohmmu battery for a few months now. It does appear to have coincided with a recent upgrade. I'll be doing the reset tonight to see if it clears. For the record my original battery from Tesla started going out only one year into ownership, and having lived in AZ and had batteries go bad regularly in the heat, I wanted to switch to something that would last longer. I'm curious as to what algorithm changed, I guess we'll find out.
I just spoke with the vendor and they stated if you have not seen the error within 48 hours you most likely will not see it.
@oldpueblo , how long after the update did you see the error?
here's the procedure in case anyone needs it - again i didn't see this error.
@oldpueblo , how long after the update did you see the error?
here's the procedure in case anyone needs it - again i didn't see this error.
What would you be mentioning to tesla? That you installed an aftermarket battery that is now throwing an error? What response from them would you be expecting, other than "we would be happy to sell you an OEM battery to replace that one for XXX?
It seems unreasonable to me that Tesla would require "Tesla-only" 12v batteries in perpetuity. It ran fine for months until an update, and even longer than that in other cars.
TomT
Technical Maven
I'm sure that, had you replaced the battery with one with the same chemistry, it would work just fine and Tesla would support it if it were the car causing issues. However, expecting Tesla to support a battery that uses a different chemistry and methodology than the one that came with the car is simply foolhardy. No manufacturer is going to do that nor should they.
Yeah, but it's unlikely they're going to lift a finger in this case. I agree with your sentiment regarding 'Tesla-only' parts, but this situation is different as the battery is a different chemical make-up than the OEM which gives them the upper hand.
The best you can hope for is for Ohmmu to figure out the issue, or that a next update might solve it (unlikely but you never know).
Last edited:
Knightshade
Well-Known Member
Tesla can't "require" you buy a battery from them.
But they can refuse to support an entirely different type of battery that is causing the problem you want them to fix
As others said, its not "tesla only" batteries, it would be "batteries that meet the specific specifications required for tesla vehicle X" (which likely contain the same chemistry and statistics as the OEM battery). Thats like substituting a non AGM battery for the factory AGM one in a BMW, then complaining to a BMW dealer that "you are having a bunch of electrical gremlins".
Save your breath and dont mention anything to tesla. It could actually be detrimental for you to do so, if they "note your account that customer states they put in aftermarket battery X and symptom Y started". You DONT want that "on your file". If you want to keep this aftermarket battery, your best bet would be to talk to the company you bought it from (in this case Ohmu) and see if they have a solution for you.
If you "mention this to tesla at your next service visit" at worst they will look at you funny when you say you put in "another battery" if you actually explain that its a battery that is lithium instead of the stock battery chemistry. If you conveniently "leave that out" like most people would, tesla will say "what battery is this, its not on our list of approved parts, we would be happy to charge you a diagnostic charge to troubleshoot your issue. Our labor rate is........". Thats all just my opinion, but is absolutely the most likely thing to happen.
If you want to talk to tesla about it, you need to swap back to the OEM battery first and see if the problem goes away, and never mention the aftermarket battery to tesla. You are better off talking to Ohmu though, because as I said, the last thing you want in your automotive "file" is a note from some tesla technician that you swapped to some unapproved battery, and then started having electrical problems. If the problems dont go away, tesla would fully blame it on the battery, and you would have a hell of a fight on your hands even though whatever was going on might not even be related.
I realise a lot of you bought the Ohmmu to avoid headaches with the lead acid battery, and are/would be upset by thus problem.
This battery has completely different characteristics compared to a standard lead acid. It can, and does, even fully disconnect itself internally and can read 0.0V on the terminals at times. Clearly not behaviour Tesla is expecting from a standard battery. I'm not saying this is what's happening, but it's one of many possibilities.
Tesla will want nothing to do with this battery. It was your choice to spend the money for something marketed as "compatible" that is very, very different. I would not bring this up to Tesla at all because you've replaced a critical component with a misbehaving non-standard one. It would be a stretch, but that becomes a justifiable point for denying warranty (the 12V system is actually quite critical).
If you don't want this to happen in the future, get a normal lead acid battery with a decent warranty. Almost every one has a full replacement within 2 years for those of you that go through them so quickly.
This battery has completely different characteristics compared to a standard lead acid. It can, and does, even fully disconnect itself internally and can read 0.0V on the terminals at times. Clearly not behaviour Tesla is expecting from a standard battery. I'm not saying this is what's happening, but it's one of many possibilities.
Tesla will want nothing to do with this battery. It was your choice to spend the money for something marketed as "compatible" that is very, very different. I would not bring this up to Tesla at all because you've replaced a critical component with a misbehaving non-standard one. It would be a stretch, but that becomes a justifiable point for denying warranty (the 12V system is actually quite critical).
If you don't want this to happen in the future, get a normal lead acid battery with a decent warranty. Almost every one has a full replacement within 2 years for those of you that go through them so quickly.
