These PV panels have poly crystaline cells and are distinctly blue with a marble like appearance.
Poly crystaline PV panels are popular due to their appearance although efficiency is marginally lower than the poly crystaline type.
Open current rate is approximately 21v and closed current (charging rate) 17v.
Poly crystaline PV panels are suitable for most aplications.
Available in 75w and 155w/24v sizes.