Comment by vitally3643

Even if you have an entire season's worth of capacity, your inputs and outputs still cycle per-day. You're still cycling charge and discharge every day, you're just doing it in a very small band within the overall capacity.

This still causes wear on the battery, and it can be better or worse depending on chemistry. The only way to get around that is if you disconnect all inputs, throwing away all the excess solar/wind power and supply exclusively from battery for the entire season.

There's no real benefit apart from like a standby power supply for a cataclysmic event where all other power sources including the sun become nonviable. You just won't ever use the full capacity of the battery, so most of the resources to build it will be wasted.