I've been looking for a mod like yours for a while now, happy to find it, though I have few suggestions:

1) Could you add a abled/disabled button at the config menu for each appliance?
2) While at it, could you also make their costs customizable? I believe it's sensible to require the solar panels and batteries themselves, but other than that, the rest of the cost could be up for debate... so, leaving it customizable should be fine, right?
3) That's the main one actually... what I've been looking for the most is a way to load my gun turrets without bringing the power lines to the front line... I can thing of other applications, but, is it possible to make a solar-powered inserter? I could even lack a battery, but only work during the day, I dunno...
4) Any other solar powered appliances are welcome too.

Thank you for making this mod, Extra thank you If you think about the stuff I suggested.
Cheers!