These PV panels have mono crystaline cells and are generally black or very dark blue in color.
They are considered to have higher efficiency than Poly Crystaline PV panels at 17% efficiency and if installed correctly they provide excellent results.
Open current is approximately 21v and closed current (charging rate) 17V.
Mono Crystaline PV panels are suitable for large applications, domestic and commercial, and are available in 10w, 20w, 50w, 75w and 125w sizes.