We passed onto the Alpha series and you can immediately see the difference. This is a
360-380W 120-cell panel that is well-suited both for residential and commercial installations of a medium scale. The efficiency is much higher: with this model it goes up to 21.7%. Heterojunction technology makes the panel a great choice for hot areas. Degradation rate is amazingly low – only 0.25% power loss per year.
The manufacturer claims that overall you get up to 20% more energy with Alpha than with conventional modules. The frame is reinforced so it is capable of withstanding the pressure of 146 lbs/sq ft. This amounts to 250 mph wind: basically, the panel is ready for any kind of tornado or a hurricane that is coming its way.