Its more expensive than solar or wind, but cheaper than those + storage. Which is a legitimate comparison as its more reliable than those, and possibly dispatch

Its more expensive than solar or wind, but cheaper than those + storage. Which is a legitimate comparison as its more reliable than those, and possibly dispatchable. From a UK perspective theres quite a lot of paperwork. You have to get surveys for flow rate over the year, and theres limits to how much you can divert. Both those combine to mean that it isn't really worth it unless you're off grid, and in the right location, with enough land, and water.