Is solar still a good investment?

Or is the solar bubble ready to pop?

Today, CNBC hosted a small debate about solar power focusing on Sunpower. While analysts believe the company has strong fundamentals, others believe that SunPower, and the entire solar field, are part of a solar stock bubble that is primed to pop.

With poly-silicone supply catching up to demand, some might think that a price reduction in solar systems might create more business. However, solar skeptics pointed out that subsidies remain a huge sticking point - it appears there will be less subsidies in the near future. Additionally, even if solar power is to become cost-competitive, it won't be today's solar technology that will achieve such economies of scale. And with numerous new solar technologies emerging, tomorrow's solar winner might not even be known today.

Ultimately, the solar space is still raw, green and unpredictable.