This solar panel (drop charger) can provide 12V an accumulator with a constant flow to keep these at level. Simply outside or behind the window to place and can start charging.

With this solar panel (drop charger) can provide you 12 V an accumulator with a constant flow to keep these at level.
Simply outside or behind the window to place and can start charging. Including suction cups with which affirmative to a window is extremely simple. Do not can overload. With E-Sun 1.8 Watt the zelfontlading of the accumulator are compensated and automatic maintenance are committed. As a need flow or drop charger for your car, camper, engine, bicycle, boat at E.G. long-term standing still.

Starts immediately with drop drawers; if these are exposed todaylight, even behind glass.
Touch-action indicator; leave see that your panel for charging is.
Plug & Play for fast affirmative; sigarettenplug and battery clips are provided.
Can be everywhere used; for this the required suction cups are provided.   
Ly direct to connect and by linking with/to more panels
LED indicator blink at drawers
Built in laadregelaar
Connection with 20 mm cigarette stopper contact
Including 3 meters string and battery clips
Built in ontlader protection
Capacity: 135 mA
Dimensions: 508 x 165 x 38 mm
Weight: 410 grammes.