Now that I'm getting used commuting and topping up every night I got to wondering whether letting the battery drop lower and charging less frequently might be more efficient by making the most of the part before the taper? For example, last night I charged at 28A and topped up the car from 70% to 80% in about an hour and a quarter (about 8.2kW consumed at 97.1% efficiency). Would it charge up any faster by starting at a lower SoC or is that only a thing when using high power DC charging?
Hypothetically would it be more efficient (in terms of energy and/or time) to let the battery run down to, say, 40% before topping up to 80% every four days or over a weekend? Alternatively, would I be better off going from 45% to 55% each day instead? Obviously, starting at a lower SoC is going to take longer to get up to a "trip" level SoC so this might be impractical in the real world but might be an interesting discussion...
Hypothetically would it be more efficient (in terms of energy and/or time) to let the battery run down to, say, 40% before topping up to 80% every four days or over a weekend? Alternatively, would I be better off going from 45% to 55% each day instead? Obviously, starting at a lower SoC is going to take longer to get up to a "trip" level SoC so this might be impractical in the real world but might be an interesting discussion...
