How deep of snow can an electric snow shovel actually clear?

Across the reviewers we read, 12-inch electric snow shovels like the EGO SNS1201, Earthwise SN74016, and Worx WG460 are rated for up to about 6 inches of snow in a single pass. Specialist subreddit users note they shine for touch-ups, walkways, decks, and steps, but get bogged down quickly in heavy wet snow or anything over 8 inches.