While the stock 170W panel is enough to keep your house batteries topped up in good conditions w/ the just the fridge on while the van is parked in the driveway, it will not keep up with active use while boondocking for multiple days. With this set up I have been able to park and live/work in my Pocket 36A for 5 days (running fridge, Truma heater, lights, audio equipment, laptop, phone, WeBoost) in mixed wether without my house batteries becoming a concern. In light of other options that would allow me this flexibility, this package got me there very easily and relatively inexpensively in that I had already added the rack to mount my ladder, Fiamma 45s awning, and WeBoost Drive Reach overland antenna. The folks at Orion have been great to work with all along the way… quality products backed by top shelf customer service. Thank you!