i came up with a cheap way to ground mount my 42 panels this worked for me! i ended up with a 62 degree angle and pre drilled all the poles used 4x4x8 in the front and 4x4x12 in the rear took three days with my wife and one other friend helping , you mount the middle bottom panel first and work both ways only bolting the uni strut on the bottom with 20 inches hanging over the 1 inch pipe using uni strut nuts hollow side toward the pipe until you get the 2nd row mounted then bolt threw the top pipe my panels have mounting holes every 34 inches and you need 31.5 inches from last mount hole to the next panel starting hole used a 3/4"piece to space the panels when we stacked them worked great drilled and bolted the uni strut to the top pipe after the 2nd row was in place allowing me to slide the channels up to keep them level. i leveled the pipes as we set them the 4x4 all in the ground at least 42" just cut off the bottoms to keep it level pre drill the pipe holes with a 1.5" wood bit in a drill press to keep them straight my angles were off but it did not matter the panels cleared by inches anyway . next wiring three strings of 14 = 440vdc should work 210 feet from the house 14 gauge three pairs i hope
parts used
panels to uni strut
1/4 20 fender clips on panel bottom
1/4" fender washers
1/4 20 bolts 1"long Phillips head
uni strut to pipe 2" 5/16 bolts
uni strut track nuts 5/16
i placed 8 steel t post with hose clamps at 55 foot and used a transit to get my strings with kara beaners straight that gave me room for a tractor with a auger to drill the holes and i could pull the strings as needed tank care mike b
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