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 Solar Car Battery Charger 1.8 Watt the reverse current protection 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

Specifications:
1. Dimension：374*165*20mm
2. Solar panel size: 305*106*5mm
3. Max output power: 1.5W/15V
4. Blinking LED charge indicator in cigarette plug
5. Capacity: 135 mA

Features:
Operates under cloudy conditions
Quick starts your car engine
Plugs into cigarette lighter
No maintenance required
UV,rust and shock resistant
Blinking LED indicate