Noted!Impossible!
OP, try to limit non-driving losses. Don't put sentry mode on unless you really need it, and be careful about what apps you use. Ideally you want as much energy as possible going into the battery and was little loss during the day as you can get away with. FYI my charging losses are only 11% over a whole year. YMMV.
Btw, what do you mean by 'charging losses'?