Is this any good?

[GotSmart]

I found enough complaints about their systems to think that at $100 the panel would be worth taking a chance on. The most complaints were about support. I would call Renogy and see what they have that would work with those panels. That way you have a good controller and a panel that can be replaced if necessary. If it works then you have saved over 1/2 or 2/3 the cost of a good working system.