* What is your pv panels dimension?_____mm Length x_____mm Width x____mm Thickness
* How many panels are you going to mount? _______Nos.
* What kind of roof do you have?__________(Tin/metal/tile/slate/shingle roof)
* What is your planned pv assmebly block? ________Nos. in a row
* How is weather there,such as wind speed and snow load?___m/s anit-wind speed and____KN/m² snow load.