kmakar
Janitor
All Products - Solar Panels - New - Signature Solar
signaturesolar.com
I was thinking by the pallet. 460w panels.
Those are bifacial and need to be able to reflect light to the back of the panel, but since you're mounting them on the barn (with about 2" to 3" space off the roof) , that'll be a no go.
These will work, but you'll need 3 charge controllers to handle the load. You'll save 1k too. Each charge controller can handle 12 of those panels like Beth said.
Solarever 445W Split-Cell Mono Solar Panel (SILVER) l Full Pallet [31] (PRE-ORDER)
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signaturesolar.com