You use excluder when bees stored pollen over excluder?
1) Put the queen lay into that super and bees eate pollen.
2) If frame size is the as with brood frames, put some pollen frames between brood frames.
3) Storing pollen over Summer is not good idea. Betlöes and other bugs propably destroy the store.
Let the queen lay into the frames. When brood are capped, move the frame above excluder... but if they fill it again.
So, they fill it with fresh pollen and that is valuable food for next early Spring build up.