The full article appears to be paywalled, but, some rough thoughts on headline alone: this isn’t tremendously unexpected, or likely to have a strong impact on renewables investments besides a slightly slower timeline. The short answer is that a lot of things, material and labor, are more expensive now than when these contracts were likely signed. Renewable technology as a whole is getting more inexpensive over time (particularly solar panels), but the technology alone isn’t the whole picture. You have to have installers and maintainers, metal and concrete. I expect these projects to end up with successful re-bids quickly, and delays of around a year or so because of it.