I bought the first one. looks very cool but the device does not detect the incoming wind energy. So I sent it back and got a replacement. That didn't work either. Then I read the comments. Many have said the same. All my wiring is correct and yes the batteries are not charged. I can check the incoming power with my multimeter so I know the wind generator is working. Just a bad product.
CARKU Pro-10 black/red
91 Review
Keep Your Battery Fully Charged With A Smart 12V Charger/Maintainer Featuring Winter Mode
28 Review
Efficient Charging With LST 7 Stages 5A Battery Charger - 3.3A 12V For Ultimate Performance
35 Review
Mroinge Automatic 6V/12V Trickle Charger For Vehicles, Motorcycles, Boats And More - Maintain Your Batteries With Ease!
29 Review