Even that's not necessarily true; your run-of-the-mill lead-acid car battery works fine for this at small scales, and a collection of them can be good enough for household-wide use. Not the most environmentally-friendly option, but such batteries are cheap and abundant.

You're right that at large scales (neighborhood-wide, city-wide, nation-wide, etc.) we don't really have the battery infrastructure in place quite yet. I'd guess that said lack of infrastructure could be resolved well before 2025, though.