3 ms·Direct from the manufacturers and/or their factory reps. This is for panels in the 50-100W range.by brk 17y agoDirect from the manufacturers and/or their factory reps. This is for panels in the 50-100W range.huherto 17y agoJust curious. What do you use your panels for? Personal use or do you build stuff to sell.kragen 17y agoWhich manufacturers, and what kind of quantities do you have to buy in?