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bwilson4web · 09-21-2023, 01:57 AM

Used EVs will become more available and a buyer needs to evaluate the full charge capacity within a couple of hours:

100% SOC kWh ~= charge_kWh / (% SOC_1 - % SOC_2)
% SOC_1 - beginning SOC from test charge
% SOC_2 - ending SOC from test charge
charge_kWh - how much charge was added

The greater the change in % SOC, the more accurate the expected 100% SOC kWh.

My test at the Toyota dealer, 2 hours, estimated the battery full capacity at ~27.0 kWh. Recently, I did a full charge test and measured 30.4 kWh which accounting for vehicle charger efficiency, ~92-95%, gives 28.0-28.5 kWh.

Bob Wilson

09-21-2023, 01:57 AM	#1 (permalink)
bwilson4web Engineering first Join Date: Mar 2009 Location: Huntsville, AL Posts: 843 17 i3-REx - '14 BMW i3-REx Last 3: 45.67 mpg (US) Blue Bob's - '19 Tesla Std Rng Plus Thanks: 94 Thanked 248 Times in 157 Posts	Evaluate EV battery capacity Used EVs will become more available and a buyer needs to evaluate the full charge capacity within a couple of hours: 100% SOC kWh ~= charge_kWh / (% SOC_1 - % SOC_2) % SOC_1 - beginning SOC from test charge % SOC_2 - ending SOC from test charge charge_kWh - how much charge was added The greater the change in % SOC, the more accurate the expected 100% SOC kWh. My test at the Toyota dealer, 2 hours, estimated the battery full capacity at ~27.0 kWh. Recently, I did a full charge test and measured 30.4 kWh which accounting for vehicle charger efficiency, ~92-95%, gives 28.0-28.5 kWh. Bob Wilson __________________ 2019 Tesla Model 3 Std. Range Plus - 215 mi EV 2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade Retired engineer, Huntsville, AL