Solar Lantern

Compact Fluorescent Lamp (CFL) based Solar Lantern

A Solar Lantern is a portable lighting device consisting of a PV module, battery, lamp, and electronics. battery, lamp, and electronics are placed in a suitable housing, made of metal or plastic or fiber glass. The Solar lantern is suitable for either indoor or outdoor lighting, covering a full range of 360 degrees.

PV module converts sun light into electricity, charges the battery which powers the luminaire. Luminaire consists of Compact Fluorescent Lamp (CFL) and an electronic circuit.

Broad Performance Specifications

The broad performance specifications of a CFL light source based solar lantern system are given below:

PV Module 10 Wp under STC
Battery Sealed Maintenance Free (SMF) lead acid battery or NiMH battery or Lithium Ion Battery
Light source 7 Watt CFL luminaire with 4 pins only along with proper pre-heating circuit
Electronic efficiency Approximately 85%
Duty cycle 4 hours a day under average daily insolation of 5.5 kWh/ sq.m. on a horizontal surface.
Autonomy Minimum of 3 days or 12 operating hours per permissible discharge

White LED (W-LED) based Solar Lantern

A Solar Lantern is a portable lighting device consisting of a PV module, battery, lamp, and electronics. battery, lamp, and electronics are placed in a suitable housing, made of metal or plastic or fiber glass. The Solar lantern is suitable for either indoor or outdoor lighting, covering a full range of 360 degrees.

PV module converts sun light into electricity, charges the battery which powers the luminaire. Luminaire consists of White Light Emitting Diode (W-LED), a solid state device which emits light when an electric current passes through it.

Broad Performance Specifications

The broad performance specifications of a W-LED light source based solar lantern system are given below:

PV Module 5 Wp under STC
Battery Sealed Maintenance Free (SMF) lead acid battery or NiMH battery or Lithium Ion Battery
Light source W-LED luminaire, dispersed beam, soothing to eyes with the use of proper optics and diffuser
Electronic efficiency Approximately 85%
Duty cycle 4 hours a day under average daily insolation of 5.5 kWh/ sq.m. on a horizontal surface.
Autonomy Minimum of 3 days or 12 operating hours per permissible discharge