FeaturesSize Closed : 230x198x15mmSize Open : 407x198x7.5mmCable length: 3mWatts per day (W) : 52Amp hours per day (A) : 4.29The PV Logic 8W Fold-Up Solar Panel is the most efficient way to keep a car, truck, boat, campervan, motorbike or caravan battery charged.This solar-powered battery maintainer is ideal for preventing a car battery from going flat whilst parked at an airport or, maintaining and extending the life of a caravan battery whilst in winter storage.The fold-up panel connects directly to a battery without the need for a chargecontroller (unless the battery is smaller than 60A).Cable and connections are supplied with the panel to attach directly to the battery terminals via an in-car 12v socket or crocodile clips.Folding into a tiny 230 x 198 x 15mm package, the solar panel is easy to store in a glove compartment or, small cupboard. The panel comes with a 2-year worldwide warranty.