That's the price range for the Hawaii projects. The cost for the (much larger) Eland and Gemini projects is $35 MWh (previous and [4], respectively).
WRT intermittency, the point of this conversation is that hydrogen generation is a solution: over-provision and generate combustible hydrogen (or ammonia, etc) that can be used later and / or where electricity performs poorly: long haul transport and high-temperature industrial processes. Many links on @ChrisGoodall2's excellent "Carbon Commentary": https://us9.campaign-archive.com/home/?u=a336c39e55a6260d59a...
[4] https://www.barrons.com/articles/warren-buffett-berkshire-ha...