Question about Keter Store-It-Out Max

That will be tight. The box is about 1.08 m high at the front and about 1.15 m high at the back (with a depth of about 80 cm). However, there are some recesses in the lid that add another 5-8 cm in height in some places. I would say that if the barbecue is 1.15 m high all the way through, it's not really possible. But a kettle grill, for example, that only has the maximum height at a small point, could work.