Is it OK to use a 72 cell panel for a residential install?
I've heard you shouldn't use 72 cell panels for residential jobs, only commercial. Is this true?
Comments
Short answer: Yes.
Long answer: Although there is nothing wrong with using a 72 cell panel for a residential roof system, there are several differences between 60 and 72 cell panels that you may wish to consider prior to purchase.
Frame color: 72 cell panels are most commonly used for commercial and utility projects. As such frame and backsheet color are kept to silver and white to minimize panel warming and power drop. Aesthetics are generally not of concern on these projects. By comparison, 60 cell panels often come with black frames and the option for a black backsheet. When paired with black clamps and racking, this provides a clean look on dark roofs.
Weight and Size: 72 cell panels are bigger than their 60 cell counterparts. This means they are heavier and harder to work with, especially on steep roofs. This is less of a concern on flat roofs or the ground, where commercials projects often call home.
Also be aware that the higher output from a 72 cell panel will, in some condions (such as a cold day, clear sunlight) almost certainly exceed the maximum input voltage spec for panel mount/micro inverters such as the Enphase M215.
If you are using a string inverter this won't be a problem, but killing x number of panel mounted mico inverters will be a real PITA!
Comments
Short answer: Yes.
Long answer: Although there is nothing wrong with using a 72 cell panel for a residential roof system, there are several differences between 60 and 72 cell panels that you may wish to consider prior to purchase.
Frame color: 72 cell panels are most commonly used for commercial and utility projects. As such frame and backsheet color are kept to silver and white to minimize panel warming and power drop. Aesthetics are generally not of concern on these projects. By comparison, 60 cell panels often come with black frames and the option for a black backsheet. When paired with black clamps and racking, this provides a clean look on dark roofs.
Weight and Size: 72 cell panels are bigger than their 60 cell counterparts. This means they are heavier and harder to work with, especially on steep roofs. This is less of a concern on flat roofs or the ground, where commercials projects often call home.
Also be aware that the higher output from a 72 cell panel will, in some condions (such as a cold day, clear sunlight) almost certainly exceed the maximum input voltage spec for panel mount/micro inverters such as the Enphase M215.
If you are using a string inverter this won't be a problem, but killing x number of panel mounted mico inverters will be a real PITA!