TEKTRUM 40W 12V HIGH-EFFICIENCY MONOCRYSTALLINE SOLAR CHARGING KIT - PANEL + MOUNTING BRACKET + 10A CHARGER + PV CABLES Made of monocrystalline PV -- the most energy efficient material; CE certified; 10A 12v/24v charge controller can regulate the charging current for your battery, and provides various protections Dimension 26.3inx22.6inx1.57in (668x575x40mm); Maximum Power (Pmax) 40Watts Maximum Power Voltage (Vmp) 17.5V; Maximum Power Current (Imp) 2.29A; Open Circuit Voltage (Voc) 21.5V 2 x MC4(female & male)/stripped solar PV cable allows the easy connection;