I went with these companies for that reason. Sol-Ark (started 10 years ago by army veterans), Mission Solar (started 9 years ago). Hopefully those are old enough to prove stability as can be expected from solar companies. I thought a lot about getting LG solar panels for that very reason of being a stable enough company to honor a warranty. But opted instead to go with the oldest companies I could find that made their products in the U.S.
Good idea; I hope it works long-term for you.