S85 Supercharging calculator?- turning lemons into flavored water idea

[kwjayhawk]

I've tried reading threads and I'm not going to beat the dead horse besides saying my S85 just doesn't supercharge like I used to.

What I think might be a different twist is if there is a way those with nerfed supercharging can calculate reliably the time to charge given their situation.

Example: At 20% SoC I can supercharge at 65kW, at 50% I can supercharge at 40kW. At 70% SoC I can supercharge at 35kW and so on.

Evtripplanner and abetterrouteplanner don't have this nerfed calculation (to my knowledge, prove me wrong!) and the "X-minutes to continue your trip at the supercharger is not accurate by a long shot. Just curious.

Pic just for SCing speed reference.

 

[AustinP]

We're in the same boat. My charge curve looks more like %SoC+kW = 100->110. Meaning at 10%, the car allows 90kW. At 50%, 55kW and at 80 maybe 30kW.
The time estimates in my experience are to be corrected by adding 33%. So if it announces 30min, it will be 40min.
So when a road trip calculated 2h of charging, it's more like 2h40' or so. But that's just me.

 

[kwjayhawk]

I just went back to look on Teslafi. My 50% SoC speed in 2019 was 68kw. Today at 50% SoC it’s 39kW.

I think at this point I’d rather change speed for mileage.

At 5% SoC my power is great! If only there were superchargers on my route every 75 miles.

 

[Rqcg]

Ever since I got a refurbished 90kwh pack my charge curves are a lot better. I'm really happy with these results. Not sure how they stack against other 90kwh packs though.. Attached is an image. Exported from a recent charge from Teslafi.com.

The issue I have with using abetterroutplanner is that I can't make a reliable calculation because I don't think my car classifies as a 85kwh anymore and I don't know what is normal for 90kwh packs. Anyway, I take the estimated charge times as an indication and look at my Tesla MCU to give me a better estimation with a destination planned.

 

[SilverString]

Does Tesla notify you when SC rate is decreased or does it just happen gradually over time without notice? Mine has never charged past 40% at 150kw and gradually falls to about 38kW at 90%. I rarely supercharge any higher. I used to get up to 185kW at V3 chargers but now it never seems to get above 155kW. Is this Tesla or the car?

 

[kwjayhawk]

Does Tesla notify you when SC rate is decreased or does it just happen gradually over time without notice? Mine has never charged past 40% at 150kw and gradually falls to about 38kW at 90%. I rarely supercharge any higher. I used to get up to 185kW at V3 chargers but now it never seems to get above 155kW. Is this Tesla or the car?

No they’ve never notified me. I have my data from teslafi. I’ll hop on my computer and screen shot some examples.

Keep in mind my 2013 S is nearing 200k miles. In fact the battery was replaced under warranty last year, but I almost wonder if all they did was open my original up and retighten a module pack wire that came loose. Because when I got it back it was the same range and charging speeds.

I know the answer for faster speeds is a new battery. I just wanted to find ways to either make minimum improvements or better plan charging stops.

 

[kwjayhawk]

I should also mention my battery capacity is 83% of what it was rated new. And I understand that batteries are consumable products. Just trying to squeeze every electron I can get.