Adding batteries is already quite common to allow for small amounts of price arbitrage. Its more common for utilities scale solar, with over half of new solar

Adding batteries is already quite common to allow for small amounts of price arbitrage. Its more common for utilities scale solar, with over half of new solar including storage, but wind isn't far behind, IIRC. The advantage of putting it next to the generation is that you get to reuse the transmission line, and make better use of it. And since transmission and distribution are more expensive than generation, anything that cuts those costs is a big win. Also, it's a site that the wind farm owner already controls, which makes it far easier than obtaining interconnection somewhere else, as interconnection queues are one of the biggest roadblocks to deploying more renewable resources right now. (Additionally, with solar, you get to reduce your inverters, which you can't do if the storage is placed at a second site)