... It contains a solar panel, a storage battery, a charge controller, an electronic ... Solar panel: 10W - 120W 3) Maintenance-free lead-acid battery: 12V 10Ah - 12V 200Ah 4) DC energy-saving lamp: 12V 3W - 12V 50W 5) Charge controller: 12V 5A - 12V ... 20A 6) Wireless, safe, easy to install, maintenance free, environmental friendly a7) No need to pay electrical bill Solar ...