If someone is looking for a way to lower the price of the trailer a small percentage, I'm not sure taking away 1/3 of the battery bank is a logical step. Basing all use patterns and all trailer designs on one overriding rule of thumb, doesn't make sense to me. These trailers are designed to cook only with an electric induction stove, they also have the option of heating with electric from the batteries, and of course, they have compressor fridges. Some folks camp in high clear weather, others at foggy beaches. Some in the snow and some in the summer heat with AC. And my theory is that usage will always rise to meet availability, with power. It's a new era and people expect to do what they want instead of adapting to limited systems. Getting enough solar has been an ongoing battle in the search for a true off-grid trailer. When I installed 660 watts of solar on my X22, and had the 480 AH of batteries, it, pretty much became an off grid trailer. But I still might have had to be careful with the AC and cook with propane. When camping at a friend's house up in Washington, the solar performance was dismal in the drizzly weather. But in the High Desert, it rocks. Also, it is much easier to get it in the beginning and be done with it than to try to add more later if needed. My friends want to go camping with us in their trailer, but they need hookups for, among other things, his CPAP. And I like to camp off-grid. So my offer is to just plug into my trailer as their shore tie connection. With 1100 AH of batteries and 1240 watts of solar, I'm the new small scale grid.