- Oct 8, 2020
- Reaction score
- "Sonic" 2021 MME Grabber Blue First Edition
I'm not disputing your math, but are we confident that is what Ford is using the actual pack capacity when it recommends only charging to 90%? That seems unlikely to me. For the owner's purposes, the max capacity is 88kWh, so it would seem that Ford is recommending to only charge to 90% of that. Otherwise why would Ford even include the recommendation since you can't charge past 88kWh anyway?Agreed that charging a lithium battery to 100% regularly is bad for its health as it speeds up the process of dendrite formation. The manual recommends charging to 90% for longevity. But the key point is that there is already a big buffer built in software by Ford, so even 100% is not 100%. The max usable portion of an extended range battery is 88 kWh, but the actual pack capacity is 98.7 kWh, so when you charge it to 100% it's actually only charged to 89% and when you charge it to 90% you're actually charging it to 80%.