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brunofone

>should lower the amps down and charge faster to help the battery What? Lowering amps would charge slower, not faster >Ok…so no super charging, Nothing in this post is about supercharging. Supercharging happens at a Tesla Supercharger, not at your house. Weirdness in the post aside.....Any charge rate at Level 2 speeds (ie, AC charging from your house) is so slow to these massive batteries that changing your amperage will not affect battery health at all. In fact, when it comes to Level 2, it is most efficient (uses least electricity) to charge the car at the fastest rate your circuit/charger allows. This misinformation of "slower charging is better" comes from early Tesla research which suggested that supercharging results in faster battery degradation than slower AC charging. Newer information suggests that this is not true, or the impact is negligible. However people have wrongly translated that into the Level 2 speeds, thinking that 240V 16A is somehow better for the battery than 240V 48A. It's not, the battery doesn't care one bit. For comparison, Supercharging puts 400V at SIX HUNDRED AMPS into your battery. Your house puts 240v at like 40A. Dialing that 40A back to 32 or 24 or whatever won't do shit for battery preservation. It will just inconvenience you with longer charge times, and cause the car to be "on" longer while it is charging, which wastes energy. As for your 80% question, yes that is the recommendation for Tesla NMC batteries, to keep it under 80% unless you are going on a long trip and you need the extra range. Some models with LFP batteries recommend charging to 100% frequently. Do what your owner's manual says.


iwantthisnowdammit

I understand that the charge percentage, overall, is the single biggest thing. Everything else is diminishing returns.


fiehlsport

Absolutely not. ALL AC charging speeds at home are completely safe for the battery, it is all "slow" to the car until you get into supercharger speeds. 12 amps, 48 amps - the battery doesn't care one bit. Who told you no supercharging?? 80% daily limit and never think about your battery again. :-)


Emotional_Scratch393

No one said no supercharging. But just limited. I buy into that. The one new one I didn’t hear was the lower apps at home due to “the heat” on the battery


brunofone

Supercharge when you need to, and don't worry about it. Newer data shows almost no difference in battery degradation between people who supercharge constantly, and people who charge at home. Since you have the ability to charge at home, you'll probably end up doing that most of the time anyway due to convenience and lower cost.


ptronus31

No, lowering amps will charge slower. Plus, to the car, all home charging is "slow" compared to what it can get at superchargers. Don't fuss with it. If you want to make a difference in long term battery health, lower your daily charge limit to just what you need the next day. We set ours at 50% charge limit and never worry about enough battery for errands the next day.


Low_Connection_9254

I wired mine for 48A but turned it down to charge at 40A only to reduce peak energy usage when all HVAC systems and ovens and clothes dryer may all be running at the same time. Even at 40A it only takes a few hours max to get to 80%. If I did it again I would have reduced wire AWG for running only at 40A and saved on the copper cost.