Those of you who know me better, know also, that I am a moderate fan of photovoltaic energy systems (solar panels). The first solar panel I bought (flexible 10 W) 5 years ago, and since that time, my PV system has grown to 150 Wp. Lately I aquired two 30 Wp panels, which I want to review here as soon as possible.

I calculated some time ago that photovoltaics is not a viable solution from the economic point of view. But is it worth to spend energy od manufacturing PV panels and use them somewhere else to produce solar power? Isn’t it just a way to store electrical energy? What is the EROEI of such an investment?

I wouldn’t worry about that if I didn’t hear an interview with Steve Harris of, who is an expert in the energy field. He said that PV systems are one of the worst investments you can make, because you simply transfer energy in the form of silicon crystals from Japan to USA or Europe.