You're pretty close to the ideal location for solar + batteries. For much of Europe or the Eastern US, this amount of storage would be nowhere close to enough, by orders of magnitude - they need to make it through the winter, and generate heat from it, after all.
For each location, there's an ideal amount of storage and an ideal amount of overbuilt capacity, both depending on hardware costs (and contributions of wind to the energy mix).
In your case, both numbers are relatively small. With lower incident sun, persistent cloud cover, and the possibility of becalmed wind turbines, storage requirements can start to make thermal batteries or hydrogen storage economical.
> I have about 40kwh of storage
You're pretty close to the ideal location for solar + batteries. For much of Europe or the Eastern US, this amount of storage would be nowhere close to enough, by orders of magnitude - they need to make it through the winter, and generate heat from it, after all.
For each location, there's an ideal amount of storage and an ideal amount of overbuilt capacity, both depending on hardware costs (and contributions of wind to the energy mix).
In your case, both numbers are relatively small. With lower incident sun, persistent cloud cover, and the possibility of becalmed wind turbines, storage requirements can start to make thermal batteries or hydrogen storage economical.