Batteries are not cost or resource efficient for winter where I live. Less than 8 hours of sunlight is not enough to heat a house during the day let alone night. There simply isn't enough solar generation even when overprovisioned to last.

Batteries aren't the solution to seasonal variation, are they? Discharging once a year means the batteries either need to be ultra-cheap or the electricity they provide would be very expensive. Batteries provide easy access and relatively efficient round trips, but at a high capital cost.

For me it is somewhat mysterious that wind/solar proponents view hydrogen (and methane/ammonia) as an unnecessary competing technology.