Tested this with 1000 Power Generator Blocks
putting in by hand 1000 of them fills the storage to 100% and counts as overcapacity
pulling up to 1000 into a storage isnt working .. it stops at 999 (99.9%)
putting in 999 and trying to add 1 isnt possible either
seems to be a problem with checking the content as < than Max not as having reached it exactly