4 ms·That saves no money at all, because you still need it for the cloudy day or week.by gizmondo 5y agoThat saves no money at all, because you still need it for the cloudy day or week.zbrozek 5y agoOr use a generator when that happens. At my place that would be a week or two per year.epistasis 5y agoEven cloudy days produce power. Charging the car at a grid connected point instead of at home would probably shift enough usage to last a week.