Hello,
For some reason, the auto energy recover function doesn't work sometimes. I have it set to recover 200 energy, but I also tested it with 300 energy. It will recover the value I have set only once, but after that it won't recover any more energy, despite still being on (the button never turns grey). I have noticed this only recently, maybe one week or so.
I'm using the latest version of eRep+ on Firefox 22.0 and my OS is Windows 7.