I have 800W of roof-mounted solar panels, and I just got two 200W Renogy "suitcase" panels. All of these feed a 400aH 12V battery bank. Summer energy generation

I have 800W of roof-mounted solar panels, and I just got two 200W Renogy "suitcase" panels. All of these feed a 400aH 12V battery bank. Summer energy generation was pretty solid, and I went a max of about 8 days using just the 800W roof panels without having to top off with the generator. Now, in the fall, I'm in Quartzsite, AZ, and the 800W flat-mounted panels were are getting me a few days before needing to run the generator for at least a few hours. Adding the extra 400W of portable, direct-able solar panels did the trick, and I'm staying fully charged on sunny days (which is most days here).