I am going to start to dig my holes for the poles for my solar panels. I've seen several different ways it has been done from the pictures posted. I do have wind from the north northwest at times that is pretty good. But not consistent, just during the spring storms and off and on in the late fall. Is there a handy formula for the size of the base. There will be 3 panels each post and one more could be added later if needed. 3 ft in the ground 16 in wide concrete base, above ground 9 ft high 4 in sed. 40 pipe. 10 ft long panel supports(frame) 6 ft pivot point, 4 ft above 6 ft below. I will be adjusting them three times a year to different angles. Twice to pivot them for winter sunlight. There is a mountain in my way during the time from late November to February. I cannot see a problem but it does not hurt to ask. 13