I don't have PCT experience but I do use a Steripen. I really like it. Your concern there is going to be batteries. The problem I have noticed is that if you leave the batteries in the Steripen for any length of time they seem to lose charge. If you take them out after each use then it should be fine. If you are careful that way and change your batteries every time you re-supply then it should be fine I would think.

I do have the solar charger also and I have tried it. It seems to work but needs good sun for quite a few hours. You won't get that everywhere on the trail so I wouldn't rely on it.