Big J’s 23 Lightning
Member
- First Name
- John
- Joined
- May 18, 2023
- Threads
- 4
- Messages
- 22
- Reaction score
- 3
- Location
- Encinitas CA
- Vehicles
- 23 Lightning
I went on Ford.com. How do I find any health info on the 12v battery? Thanks for all the info!!!Yes, Lightning. Yes, there are a couple of threads on this forum regarding the 12v battery. The small 12V battery and Ford's charging strategy are inadequate for its purpose for folks who do not drive an hour or more daily. The 12v battery spends much of its time between 50%-80% SOC which is not ideal for an AGM battery and can cause premature failure like in my case (and many others).
Here is a 12v health check that may give you some insight:
- Sign on to Ford.com and check your LVB SOC (I learned this today from the great folks on this forum). It should be above 50%.
- Turn the truck on for an hour and then check the 12v SOC again on Ford.com. It should be 100% or close to it. If it doesn't get to 100% in 1-1.5 hours you may have an issue with the health of the 12v battery or the BMS may be out of whack (there are instructions on this forum regarding resetting the BMS)
- Let the truck sit off for an hour and check the SOC again on Ford.com. A healthy battery should be above 90% after an hour (probably 95% or so)
- Let the truck sit off for an additional 6-8 hours (not plugged in) and check the SOC again on Ford.com. A healthy battery should lose no more than about 10%-15% during the 6-8 hours so it should be around 75%-80% or more (assuming you have no aftermarket devices sucking on it)
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