For many years we lived aboard a sailing yacht and used a wind generator from Wind Bugger. It was a hefty device, the blades were almost the size of a piper cub. It was not quiet in 15 knots of wind and above which was minimal for charging. Ours was rigged to be hoisted in the rigging when at anchor. It had a centrifugal clutch to stop it in high winds. In the Islands of the Caribbean it was very effective, managing to supply power for our 12 volt fridge and other needs. The trade winds blow almost constantly.
But as we moved into northern areas the winds became less steady it was much less help. We were camped at Assateague Island a few years ago someone had one of those three bladed generators as pictured here to operate a medical device for sleep apinea (sic). They said it was only partially helpful.
I have hesitated in getting another wind generator as I believe that solar is a much better use of our resources in the conditions we find ourselves with the TC. I may add another panel to the 150 watt array we now utilize. I've found that we need a fuel powered generator to operate for longer times off the grid with our power usages.