The onsite-power startup Mainspring Energy has raised more than $150 million in the first close of its Series E, and will be deploying up to 150 of its linear generators in the next two years.

Why it matters: The double-barreled announcement reflects significant buy-in from major players — Khosla Ventures and Bill Gates, and industrial customer Lineage Logistics.

What's happening: Other investors include Lightrock, a growth equity investor that led the series E, and existing investors Fine Structure Ventures and Princeville Capital.

Meanwhile: Lineage Logistics, a warehousing and logistics management company that bought two Mainspring generators in November, has agreed to purchase as many as 150 of the generators through the next two years — a deal representing "more than $100 million," Mainspring founder and CEO Shannon Miller tells Axios.

The bottom line: "The market is definitely on a roller-coaster ride," Miller says.

Editor's note: This article has been updated to reflect that Mainspring raised more than $150 million in its Series E, rather than $100 million which was the total in a draft of the press release provided to the reporter.