Pls define "solar ready" in terms of RV industry

I suspect Zamp provides free "solar ready" kits to manufacturers. It's a win-win for both. The manufacturers get to advertise "solar ready," and Zamp more than makes back the couple of dollars it costs per unit if they sell their overpriced panels/controllers to even 1% of the owners. Many of them don't know any better, or are simply willing to overpay for something which is "plug and play."