This question could either be yes or no and it is completely predicated on your knowledge about electrical systems. Even if you think you know what you are doing, however, you still may risk injury if you attempt to install a level two model by yourself. Here is the reality of the situation; if you have the proper education and possibly a degree in electrical engineering then you could probably handle this. In short, do so if you are an electrician.
Considering the fact that only a select few will be qualified to handle such an installation, it will probably be better to simply hire an electrician. While this will amplify the cost, this is something that should not be messed around with. Ignorance will be your worst nightmare here, ladies and gentlemen.