[Creeker]

Rick we recently purchased a Renogy 200 watt portable suitcase. It puts out around 12 to 13 amps when tilted and aimed correctly on a bright sunny day. I would expect your roof mounted 190 panel to be a little less.

Solar is so variable with amount of sun, individual intended use, battery bank, charge controller, wire sizing etc... its hard to tell anyone whats adequate for them. Once you get a panel and see how much the output varies you will have a better understanding. I say give it a go and see for yourself. It will certainly help and only you will know if its enough.