One thing I've read is that if you can dual sided panels mounted on a frame over white gravel and really boost secondary feed as much as 20 to 30%. If they're

One thing I've read is that if you can dual sided panels mounted on a frame over white gravel and really boost secondary feed as much as 20 to 30%. If they're mounted on a roof then obviously you can't benefit from that so it would be cheaper to go with single sided panels.