SunPower

1.50 W 5″x2.5″ A grade 21-24% Highest Efficiency Monocrystalline Sunpower Solar Cell with Busbar.

Semi flexible  -so less likely to break when tabbing and offer additional ways to use them

21-24% efficient -One of the highest powered solar cells available

Both Contacts are on the back: These have both the Positive and Negative points on the back allowing neater panels and alternative ways to use them.

Mono Crystalline