Longer cable for solar panel

Am looking for a longer cable to attach to solar panel…10 to 20 feet long.

Was wondering where to find something like that.

I have purchased extension cables from Amazon. This link is to a 20 foot, but the page gives multiple lengths. I was happy with the quality and they work well. My preference is for the thicker 10 gauge cable size, and for the joined cable style rather than two individual cables as it’s easier to work with IMO.