What’s the difference between cheap solar powered roof vents from your local hardware store, and a quality solar powered ventilator unit from Solatube Australia?

What’s the difference between cheap solar powered roof vents from your local hardware store, and a quality solar powered ventilator unit from Solatube Australia?

What’s the difference between cheap solar powered roof vents from your local hardware store, and a quality solar powered ventilator unit from Solatube Australia? Size of the unit and fan blade Quality of panel Size of the motor Roof flashing type Warranty period Testing methods Size of the unit and fan blade When comparing roof
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