However, when some of them are cheap to purchase, it is expensive to use; worsely, when some of them are not cheap to purchase, it is even energy costly to us, isn't it?
Is there any other fan to help us save troubles and bring down the costs?
A 10 feet / 5 blades / 1500W AC unit, product cost can be as high as to USD2000, while it still remains nonstop to ask for heavy electricity bills every month, so bad...
* if the fan runs 8 hours per day, and local electricity cost is $0.15 per KWH,
* our DC fan is absolutely 0 cost for minimun 8 sunny hours/day
electricity wire connections are done here
it smartly shift the power suppliers between solar panel & AC/DC power adapter to the fan
DC output: 36V*8.9A
it provides backup power to the fan only when
solar panel's input is inefficient