The only issue with that worth considering is the lower charging rates are less efficient, particularity if you have an unheated garage. It needs to heat the battery, so more percent of the energy delivered goes to heating at lower rates. That, and because you are at 110v 220v you have more resistive losses. I think it's in the range of 20%, and if you add that to a cold garage problem, you may pay for the difference in electrical usage over the years.
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