12 Volt charging Amorphous glass solar panel measuring approx 330 x 230 mm or 13 x 9 inches with an output of approx 3.5 to 4 watts,ideal for cheap maintenance trickle charging of car,caravan and boat batteries, these are supplied unwired, copper solder tags are provided on the rear so you can solder on your own wiring,they come complete with blocking diode which must be soldered into the positive cable if the panel is to be permanently connected to the battery to prevent battery discharge, price includes vat and uk delivery.