SOLAR LANTERN

Entire electronics housed on a single PCB with connectors for easy replacement without any need of desoldering. It contains a high frequency, 27KHz, pure sine wave inverter to drive 4-pin, 7 W CFL with pre-heat technique to avoid the blackening of ends. Inverter is protected against accidental short or open circuit conditions. Charge controller is shunt type regulating with temperature compensation. Very low drop out voltage to utilize the full potential of solar panel is achieved by a Schotkey diode which also prevents reverse current from battery to panel at night. Protections are provided against reverse battery connection, over charge and deep discharge of battery and short circuits. Idle current is less than 1 mA for prolonged shelf storage. Lumen output is constant over entire operating range of battery voltage. Two indicators are provided to show the charging state and battery low condition by two LEDs. Sealed maintenance free battery of 12V /7 Ah is fitted inside to give over 4 hours of backup every day. 10W solar panel with suitable cable for connection is provided. Over 90 % of rated Lumen output is guaranteed after 1000 cycles of operations with 2 minutes on followed by 4 minutes off period as is mandatory by MNES. CFL is fitted in base down configuration with 360 degrees orientation