After a couple years pre-heating water direct 3 phase AC with my 16' I have switched over to charging 8 L16's @ 24 VDC. This past Spring I lowered my machine and made many improvements as well as installing the new stator.
I have a DR3624 inverter, Trimetric monitor, DC disconnect etc. etc. and soon to have the Coleman 440 controller. (overpriced but seems simple and heavy duty as a dump load controller) Having a decent day of wind today and I switched over my refridgerator circuit to the batteries earlier and so far it's been a free day of running it and then some.
Charging batteries is a different game for sure, I could probably close up the air gap a bit and get more power but right now it seems very efficient in the 10-12 MPH range at a good 300 watts and runs easy. I'm watching the furling closely, I had lessened the hinge angle a while back and it looks like about 20 MPH things start to happen but I'll need better wind to be sure. Cut in is at 85 RPM and it looks like Max. should be 250-300.
More news to follow as I check things out but so far it's all been a very successful change over. Dave B.