Everything that I've read indicates minimizing the average depth of discharge is best for the battery. So charging the 10% every day, or 20% every other day, rather than waiting. Also you'll increase battery longevity by keeping it closer to the 50-60% mark. Absolutely no need to charge it to 90% if you're only using 10% per day. Only charge to 90% if you need it for a long drive. If it were me, I'd set charge limit to 60% and charge at least every other day.