We have had three Montana's now, and this is our first with dual pane windows. We think they keep the coach much quieter, and maybe just a little warmer. As with most things RV, everyone's situation is different - lifestyle, finances, usage, et. If I was fulltiming, I think I would go Solar first, possibly with lithium ion batteries for weight. Since we boondock a lot, I have two Honda's. I can take them out and use them on the stick built with the transfer switch in case we have an outage. Not a concern for a fulltimer. Best of luck.
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