The price of batteries is coming down so fast, that this paper has basically said it makes more sense to build a solar project, and then 5-10 years later invest in batteries *then*, when the cost of batteries is so much lower than it is today.
For context, we've seen the cost of batteries in China drop by 30% in a single year (!) for one of the larger tenders in 2025
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https://bsky.app/profile/elephanteating.bsky.social/post/3ltmdaeckwk22