Kelsey Grammer says the WORST investment he ever made in his life is directly related to "blowing" ... but it's NOT his ex-wife Camille -- it's windmill technology.
Grammer was leaving Bouchon in Bev Hills yesterday when he told us how he took a high-6-figure loss after investing in windmills a while back.
"Big wind is doing OK ... but it was a small wind investment and it cost me a lot of money."
Fortunately for Kels ... he's rich and recovered from his bad investment ... but says, "It's just one of those things that's just a straight loss."
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