I've never heard that Solar Shades are to be used on the exterior only and I've seen plenty of use on double pane windows within the house. If a shade had an insulating effect and was sealed along the edges or had sealed side tracks, then that would not be safe to use with double pane. Solar screens are just that.....screens. They go outside the window just as any other type of screen is used. Roller shades can be decorative lightweight window coverings, but the term 'roller' is also used for the Solar Shades since they are usually on some type of roller system. It sounds like Solar Shades will fit your need. Here is a link that might be useful: Interior Shades

This is an old thread, but I will comment in case anyone is in the same situation. I have 12 Levelor cellular shades. The only ones I have had problems with are the top down bottom up shades, Cordless. They have been replaced twice then inner strings replaced. The 4 with issues are on my French doors. Raised and lowered every day. After about 2 years, they start to lose their full length. When they stopped covering the glass, I complained. Blindsaver.com replaced the first group of 4. Levelor replaced the second set of 4. By then, I was told no more replacements. After a few years, the strings, again started not going to full length. I had to pay to ship the 4 shades, but they were fixed and returned at no cost. Levelor service is great. They say this problem only happens in the cordless shades. So, on my third set of shades in 8 years. I put up with it because I want cordless shades.

My wired solar shades (south facing windows) are Lutron and are awesome and whisper quiet. These are hard wired as it was a new build. For my vacation house I installed rechargeable battery motorized shades and like them also. Not as beautiful and quiet as the Lutron but I like that I can control the unreachable upper windows in my vaulted room. Another advantage is if you have a large quantitiy of windows (I have 9 in my master suite) the electric ones can be grouped together and opened/shut together rather than manually doing 9 seperate windows in the morning and evening. I still have manual shades in some rooms that only have one or two easily accessible windows. It really depends on your situation whether its worth the extra expense.

Woven wood shades are my favorite window covering for any decorating style. The thing to keep in mind is that they don’t provide privacy at night, so sometimes have to be paired with drapes.