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LED based Home Lighting Systems
MNRE Model 1-4 (LED)
A LED based solar home lighting system aims at providing electricity for operating LED lights and other small DC loads for specified hours of operation per day. White Light Emitting Diode (W-LED) is a solid state device which emits light when electric current passes through it.
An LED based solar Home lighting system consists of a PV Module, control electronics, battery, and W-LED based Luminaires. The battery is charged by electricity generated through the PV module during the day time and the
luminaires provide the light as and when required.
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Broad Performance Specifications |
| The broad performance specifications of a W-LED light source based solar home lighting system are given below: |
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Light Source White Light Emitting Diode (W-LED) |
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Light Out put White colour (colour temperature 55000-65000K) |
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Minimum 15 LUX when measured at the periphery of 2.5 meter diameter from a height of 2.5 meter. At any point within area of 2.5mtr diametre periphery the light level should not be more than three limes of the periphery value. The illumination is uniform without dark bands or abrupt variations and soothing to the eyes.Electronics Min 85 % efficiency Average duty cycle 5 hours a day Autonomy 3 days (Minimum 12 operating hours per permissible Discharge |
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There arel four models of W-LED home lighting systems. The configuration of each model is as follows: |
| Model |
SPV Module |
Battery Plate |
Cable Set |
Charge Controller |
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Luminaries With Electronics |
Module Mounting
Structure |
LED-SHS -1 |
12V 06WP |
12V 07AH |
Provided |
Provided |
NO |
1xLED Light |
Provided |
LED-SHS -2 |
12V 12WP |
12V 12AH |
Provided |
Provided |
NO |
2xLED Light |
Provided |
LED-SHS -3 |
12V 24WP |
12V 20AH |
Provided |
Provided |
Provided |
2xLED Light |
Provided |
LED-SHS -4 |
12V 24WP |
12V 20AH |
Provided |
Provided |
NO |
4xLED Light |
Provided |
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Duty Cycle |
The LED solar home lighting system is designed to operate for average 5 hours a Day and fan for 3-4Hrs, under average daily insolation of 5.5 kWh/sq.m. on a horizontal surface. |
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The system has protection against battery overcharge and deep discharge conditions. |
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.Fuses are provided to protect against short circuit conditions. |
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A blocking diode is also provided as part of the electronics, to prevent reverse flow of current through the PV module(s). |
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Electronics will operate at 12 V and has temperature compensation for proper charging of the battery throughout the year. |
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Other Features |
The system is provided with two LED indicators: a green light to indicate charging in progress and a red LED to indicate deep discharge condition of the battery. The green LED will glow only when the battery is actually being charged. |
