Oil sucks, wind blows.
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I was looking at the mounting of the rectifiers and wondering if the heat sinking is sufficient. I took what I thought was a pretty large aluminum heat sink (about 12.5 by 26 centimeters about a centimeter thick base with about 3cm fins on that) out by the Dan's in the spring and DanB told me that it would be insufficient for a 12V roughly 3meter machine, but maybe ok for a 48V machine because the amps are so much less. I can't tell for sure, but it looks like your rectifiers are mounted on a thin aluminum box and I'm wondering if that will be sufficient in windy weather.
Again, They look great! Rich Hagen
I am pleased that I was able to help.
I am sure the rectifier heat sink will be adequate for 48v, especially up there in the wind. The 12v case is a lot worse.
Look forward to hearing how they perform.
Flux
That is a nice output in gusts, it should go well in stronger winds.