Ozboz7
Member
I work in the battery world but other opinions will exist!
80% is often cited as an optimal charge level. the less energy you store in the battery the more relaxed it is and the less damage caused. Think of the cell like a balloon filled with water, you can fill it to absolutely full but it'll be very stretched and tight and will become weaker
Another aspect of 80% is this is about the point that the pack reaches full charge voltage and switches from a constant current to constant voltage phase.
Charging to 100% for LFP makes some sense, as said they have impressive cycle life even with full charge and discharge, so it will degrade the cell but by an appreciably smaller margin than for the Li-ion pack. LFP will often achieve 2000 - 5000 cycles. Hence why Tesla isn't bothered about you charging to 100% to maximise range as you'll still get more cycle life.
Was in this very bloody thread gonna ban myself from making posts post-nightsMy own way of using my car is to charge to about 85% once a week timed to finish by the time I'm about to do a commute.