Tektrum 30w Solar Panel/Blocking Diode Cable/2m long Cable and Clamps Battery Charger Kit for RV, Home, Boat, Pool Made of monocrystalline PV -- the most energy efficient material; CE certified; An extra 2m long cable with clamps provides the easy connection to batteries or electronic devices Dimension 18.3in x 21.9in x 1.4in (464 x 556 x 35mm); Maximum Power (Pmax) 30Watts; Maximum Power Voltage (Vmp) 17.5V;Maximum Power Current (Imp) 1.72A;Open Circuit Voltage (Voc) 21.2V Short Circuit Current (Isc) 1.93A; An extra blocking diode cable prevents reverse current flow.