When you get too close to the sun...

I made an index summing up three big US solar companies to try and see what's going on with this market and most importantly why isn't it soaring high like everyone's expecting... The reason is probably hidden somewhere in the regulation wars and the single companies financial health. There are plenty of articles around to read up on this. Somebody suggests a correlation between oil price and solar: low oil prices makes fossil energy too competitive and undermines solar. However, when you compare oil prices the correlation looks weak.
Overall the solar market is still technically a bull market in a wide consolidation moment, but the recent yo-yo makes it extremely dangerous for investors to hop on the so-called "solarcoaster".
Looking for an entry in this market is complicated business. Does anyone know what could be a catalyst to get us out of this consolidation?