Various Models 1> SP25 --> 25W Panel 6W LED lamps, 26AH 12V battery, 2> SP37 --> 37W Panel, 9W LED lamp, 40AH or 42AH battery, 3> SP75 --> 75W Panel, 18W LED lamp, 73 or 80AH battery4> SP 150 --> 150W Panel, 36W LED lamp, 150AH Battery Feature1. Stand alone system2. No need of laying cables, trenching3> LEDs with > 100 lumens/watt4> All protections to increase battery life