DIY 15$ 40w Solar Panel

so i purchased 10 solar cells that are rated for 40 watts. i'm only getting like 5w from them with my setup due to the low voltage but i can get more power from it with a few fixes. maybe a giant joule thief.

1st song Crafting theme from FF14
2nd song from Jersey Devil PS1
3rd song Lenny the Lyre Bird from Ty the Tasmanian Tiger on PS2