Power conversion inefficiency, distribution matrix maintenance, demand pressure on local energy price, adding toxic batteries and more complex machines to the system, not accounted for.
Then, are you considering power converting inefficiencies, relying in a distribution matrix, burdening the local power production, maybe making prices go up, and adding toxic batteries that end up in a land fill ?
But for people money and beautiful grass is more important than the environment
It would be more significative to REDUCE the spent power, instead of changing the power storage from hydrocarbon to battery, e.g. change the grass to something that doesn't require trimming as often, or at all, like clovers.
But for people, beautiful grass is more important than the environment.