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Ohmmu Battery & 2020.28.6 update
- Thread starter lUtriaNt
- Start date
Saw I have a new update, probably 2020.40.3 but first I got the pesky Low Battery warning:
Ok after many Updates, I finally I got the dreaded message that my Ohmmu12 Volt battery is low, I checked the Voltage and it was fine:
So I replaced it with the OEM Tesla lead acid battery and did the proper reset by removing the rear seat & contractor. The Tesla OEM battery reads 13.70 Volts:
Seems like 2020.36.11 got me this time, will message Ohmmu for the replacement.
Fred
Ok after many Updates, I finally I got the dreaded message that my Ohmmu12 Volt battery is low, I checked the Voltage and it was fine:
So I replaced it with the OEM Tesla lead acid battery and did the proper reset by removing the rear seat & contractor. The Tesla OEM battery reads 13.70 Volts:
Seems like 2020.36.11 got me this time, will message Ohmmu for the replacement.
Fred
bro your car put up a good fight and held out!!
i got 40.4 today. i just got 40.3 a few days ago. tesla changed something in the charging algorithms so the 12v error doesn't show up for days--prior it would show up like within the same day in my case, but now its near a week.
i emailed sean at ohmmu and my replacement is about 3 weeks out. i put in the request the day he sent out the notice. he has been shipping lots of these and is swamped with this process according to him, so for sure get ya bid in asap.
i got 40.4 today. i just got 40.3 a few days ago. tesla changed something in the charging algorithms so the 12v error doesn't show up for days--prior it would show up like within the same day in my case, but now its near a week.
i emailed sean at ohmmu and my replacement is about 3 weeks out. i put in the request the day he sent out the notice. he has been shipping lots of these and is swamped with this process according to him, so for sure get ya bid in asap.
eyedrop
Member
I personally think it’s crazy to put non OEM part in a Tesla. Let alone work on the car yourself. They are proprietary AF and Tesla purposefully wants the cars locked down to the service centers. Once the vehicle drivetrain warranty is out, you throw the car away or expect expensive time consuming but interesting headaches. Kind of like Apple. This is the world we live in...
Thankfully we have alternatives that have simple diagnostics and parts available down the street at AutoZone.
Thankfully we have alternatives that have simple diagnostics and parts available down the street at AutoZone.
Simple things like replacing tires, batteries etc. you should be able to do yourself.
1.5 year with the Ohmmu without any issues, it took 2020.36.11 to take her down, I downloaded 2020.40.4 right after replacing the battery. For the SR+ it was the following:
1.5 year with the Ohmmu without any issues, it took 2020.36.11 to take her down, I downloaded 2020.40.4 right after replacing the battery. For the SR+ it was the following:
I got the replacement from Ohmmu around two weeks ago, it has been great, haven’t had the error message.
Ohmmu said that what was changed in the new update is the way that it communicates the voltage to the Tesla. Previously the battery management system was reporting a reading that it didn’t like. Ohmmu updated their BMS to report more what the Tesla is looking for.
ps I filled out the Ohmmu replacement request form almost as soon as it hit my email
Ohmmu said that what was changed in the new update is the way that it communicates the voltage to the Tesla. Previously the battery management system was reporting a reading that it didn’t like. Ohmmu updated their BMS to report more what the Tesla is looking for.
ps I filled out the Ohmmu replacement request form almost as soon as it hit my email
I just filled out the form last week but haven’t heard from them yet, also I couldn’t find my order # since I had purchased it in April 2019, 1.5 year ago.
Hope I heard back from them soon, my OEM battery is still new.
Fred
Sealander
Member
Received my replacement Ver. 2 battery 10/8 and installed on 10/9. So far so good.
so filled out the form on 2 october the day the form went live and replacement battery will be in my grubby hands Monday. got the email on friday yesterday with track info. so 3 weeks ish for me...
Does the latest revision have some sort of a data port on it to make future firmware updates easier?
We live in the desert, and regular ICE batteries last us two years here. At fourteen months, I feel like I'm on borrowed time on my 3's OEM battery. Thinking about getting the Ohmmu, but still on the fence.
MrTofuDragon
Member
Those that received and already swapped out their battery, did the replacement battery look exactly the same as the old one? I just did my swap and tried to find any sticker or marking on it that said "rev. 2" but it didn't... the labels were exactly the same as the old battery. Just wanted to see if everyone else had the same experience.
SageBrush
REJECT Fascism
I wonder what that actually means. The simple answer would be a fudged voltage reading
the battery is exactly the same. there is no rev 2 or anything to denote its a new version.
if anyone wants to know what was changed, reach out to the vendor.
if anyone wants to know what was changed, reach out to the vendor.
Pretty difficult to "fudge" the actual voltage the battery is putting out without an expensive, bulky high powered DC-DC converter.
Too bad Ohmmu isn't more forthcoming with what the problem was, only thing they can modify is the BMS in that battery pack and all a BMS should do is prevent over/under voltage to the battery. Since they are using the same Chinese 12V batteries you can get for 1/2 what they are selling them for the only secret sauce is in the BMS, they might have built their own or they might be using an off the shelf one like the 1/2 price ones are using. Perhaps their BMS cut-off the charge voltage lower than what Tesla now expects, in order to get more life and reduce warranty claims
SageBrush
REJECT Fascism
I meant that the 12v is reporting to the car a voltage different than what it measures
The 12v battery doesn't report anything. It's only connection to the car is the negative and positive terminals. So its internal BMS has to manipulate the voltage to make it look like the 12v battery Tesla is expecting to be installed.
