[HeadShed]

The prewired solar are branded to panels like Zamp. Which all come at a premium which makes sense for those who are not a DIY’r but don’t need a system big enough justifying an electrician. The charge controllers are self contained in each panel so it’s plug and play. The biggest issue is usually these are 10 amp rated, which would be a small panel good for recharging a battery for the weekend rv warrior doing some light camping. A single 10 amp line is too small for a typical solar system. Some have thought to do 24v or 48v systems and run it through the prewire to eliminate drilling a hole in the roof. The higher voltage would allow multiple strings of panels to collectively stay under the 10amp max. To do that you would need to cut out the Zamp charge controller and use a 24v or 48v one and then hook up to your battery bank wired for the same 24v or 48v. You can optionally buy an adapter too for the prewire plug so you can hardwire solar panels in from any brand. Pretty much it’s a lot of work around to avoid drilling one of many holes that are required.

imho the best setup starts with a inverter/charger/transfer so that your system can charge the batteries and your needs run off solar and then batteries when solar dies off etc