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Regular 50kwh charging

dragonvn

Member
May 19, 2019
73
29
Westminster, CA
Near my work, there's a free Chademo 50kwh charger. I usually go there, eat lunch and charge.
Anyone know if there's any long term effect on the model Y being charged at 100-140mi/h nearly daily?
 

NCC81701

Member
Feb 28, 2020
75
84
San Diego
From page 156 of the owner's manual:
The peak charging rate of the Battery may decrease slightly after a large number of DC Fast Charging sessions, such as those at Superchargers. To ensure maximum driving range and Battery safety, the Battery charge rate is decreased when the Battery is too cold, when the Battery’s charge is nearly full, and when the Battery conditions change with usage and age. These changes in the condition of the Battery are driven by battery physics and may increase the total Supercharging duration by a few minutes over time
I'm just conjecturing, but CHADEMO runs much slower than the Supercharger so it's probably not as bad/noticeable as compared to supercharging 150kWh/day everyday. Having said that, I'm not sure if it's worth a $400 CHADEMO adaptor unless you live in a condo/apartment and can't charge at home.
 

jcanoe

Active Member
Oct 2, 2020
1,505
1,548
Maryland
How fortunate, a free public CHAdeMO charging station. It should be fine as you are charging at less than 1C (where C is the capacity of the battery pack.) I would only charge to 80%.

Does the CHAdeMO charging station include the Tesla CHAdeMO adapter or do you need to use your own adapter.
 

dragonvn

Member
May 19, 2019
73
29
Westminster, CA
How fortunate, a free public CHAdeMO charging station. It should be fine as you are charging at less than 1C (where C is the capacity of the battery pack.) I would only charge to 80%.

Does the CHAdeMO charging station include the Tesla CHAdeMO adapter or do you need to use your own adapter.
The charging station has ChadeMo and CCS ports. I bought the ChadeMo from Tesla for $400. It'll be worth it in 4 months since I calculate my charging cost at home is around $100/ month :D
 

Johnny Vector

Member
Jun 21, 2020
92
122
Maryland
Near my work, there's a free Chademo 50kwh charger. I usually go there, eat lunch and charge.
Anyone know if there's any long term effect on the model Y being charged at 100-140mi/h nearly daily?

By the way, it's a 50 kilowatt charger, not 50 kilowatt-hour.

kilowatts (kW) is power (= energy per unit time)
kilowatt-hours (kWh) is energy (= power times time)
 

snord

Member
Jul 20, 2020
54
9
Louisiana
I agree with jcanoe... I'm not an expert, but I've only heard the factors that degrade battery life (maximum State of Charge) over time are: high temps (like battery preheating for supercharging), keeping the battery long term at very high or low State of Charge (%), and charging/discharging faster than 1C (1C is ~77kW for a model Y).

Bjorn Nyland had a good video on it here:
. His observation is that a majority DC-charged car had 6% max SoC degradation but a majority AC-charged car had 4%. But not exactly controlled variables nor a large sample size. The deciding factor in the video I think was probably high C + Supercharger preheating rather than DC vs AC.

For optimizing battery life on a model Y, 50kW on a CHAdeMO is probably the second best option for charging, only a 72kW Urban Supercharger is better. Free CHAdeMO are rare, I've only ever seen them on ElectrifyAmerica stations, where the $/mi ends up being close to gas. Use it! lol. Just charge only what you need to get to the next charger and a safety buffer, to keep near 50% SoC.

Someone correct me if I'm wrong.
 
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