You are not spinning a starter to crank a cold ICE with thick engine oil. When the computer fully boots the DC-to-DC converter is supplying 14 volts. The 12v should warm up when it is being used and supply more capacity as well ... but that doesn't matter much with the DC-to-DC converter going. It will just make sure the 12v battery is topped off.
Obviously there is no starter; that wasn't the question. My question was in very cold weather in one more likely to have problem operating the car when it has been sitting for a long time (weeks) in sub-zero weather. If the 12 V goes down, one can't get into the car. I don't believe the HV battery charges the 12 V battery when the HV is below 20% SoC. With a dead !12V one can't even open the charge port, either. The car needs to be "jump started".
Sitting for weeks is new information. Still how much capacity does it take to boot the computer. Not sure how many weeks we are talking about (>1 month)? If I really had that issue I would leave it plugged in and charge occasionally and use the preheat cabin delayed charge option assuming 12v rail is awake. Also I'd use that $30 hardware to monitor test. I can't imagine this is an issue. Do they have non-heated main HV pack Nissan LEAFs, as an example, in northern states, Canada, etc (ie. lithium battery in the cold even if not 12v).
The airport I park at ( for months at a time) does not have any charger. I have frequently asked the airport manager if I could plug into the exterior 5-20, “No.”
Ohmmu's website says it's shipping the ones with reversed terminals. I'm in a pickle because I need a new battery immediately and the terminal cable issue is worrying me.
Is this for your 100D? Tesla will give you a new replacement in warranty, not an Ohmmu though.
It's for my 2017 75D, out of warranty. SC is far away and I don't want to wait around. I'd rather put some elbow grease in and get a good battery while I'm at it. But the reversed terminals with the short cables kinda worry me.
Hmmm, Your not looking very hard... Lithiummoto.com/tesla-12v-battery has been supplying lithium batteries for Teslas for quite a while.
Back from a week 2000 mile road trip where the 12v DC fridge ran for the entire time. Ohmmu is still going strong.
On the 3 wk road trip, I drove 2 weeks after that msg initially showed up and had a car fridge running 24x7 for all 3 weeks of that road trip (ala DC/DC active -- hills in my graph above are probably charges back up from the DC/DC).
Hmm ... this response sounds like a bot? What specific post where you responding to and what specific low voltage, how low, and for how long?
Access, removal, and install [url] is super annoying. I'm not sure how to know when my Ohmmu will need to be replaced. Admittedly, I have my old battery on a tricle charger and I take it with me in the lower truck area when I go on long road trips (with 12g wire to hook up in parallel like a jump box or to swap out worse case). So much for weight savings ... bahaha.Just replaced my own batter from 2019 with another OEM. What a terrible batter design
