Hi,
You will still save money with a 3rd party installer. In order to get a good system you need to know what you want before you darken their door.
I can already tell you that 190 watts is unlikely to be enough. Why? Because I have 256 watts of panels that may be the best ever made for low light conditions--and it is not enough.
Why is my system too small? Because in 2005 the cost was $5 per watt for the panels so it cost me $1700 when all was said and done. Now costs for panels are often lower than $1 per watt. The best price I've seen was $0.36 cents per watt.
I would suggest bumping up to between 400 and 800 watts.
If you must do just 190, then make sure the charge controller and wiring can handle a lot more watts. Otherwise you may find yourself having to start over as though there were no system at all.
The factory, you may find, gets a LOT of things wrong. The words quality control and RV should not be used in the same sentence.
Feel free to message me directly or to reply on the thread. I've had solar since 1992. Just to show how prices have dropped, the 1992 system cost $1700 for 30 watts.
