Mighty Max Battery 100 watt Off Grid Solar Power System – 100w 12v -18v . . . Mighty Max Solar delivers exactly what is advertised! You’ll receive a 12V panel with optimum voltage of up to 18V Delivering 100 Watts of solar energy, not less, like other leading manufacturers Perfect panel for charging up your 12V battery or wire up multiple panels in series for a 24V 48V off grid battery charging system