2. How many hours can it be used ?
Solar lanterns and home lighting system  can work for about 4 hours daily, and  street lighting systems with automatic ‘ON’ and ‘OFF’ can work for 10-12 hours daily if the battery is charged regularly.

3. Will the systems work in rainy days ?
The system is designed to work with 3 days autonomy, i.e., when charged fully, it can work for 3 days without fresh charging. However, in cloudy / rainy days, modules can absorb diffused light and can charge the battery which can serve for lesser hours.

4. Whether the rain water will affect the module ?
Modules are fixed in the open since they have to face the sun. But rain water will not affect the working of the module, since the actual conversion of sunlight into electricity is done by the solar cells placed inside the module which is sealed and made water proof.

5. How should the solar module be fixed in the open ?
The solar module should be placed in an open area, preferably on the roof top, slightly inclined and facing north / south. The module is connected to the battery through a cable of about 5 metre length or as may be required.

6. What type of battery is used ?
The batteries used are of tubular, deep discharge, electrolyte, low maintenance battery for home lights and street lights unlike car battery, which is designed for low discharge. In the case of lantern, the battery is provided inside and sealed and so it is called maintenance free battery.

7.  What is the proper system of maintenance ?
Maintenance is very negligible except for topping of the battery periodically using distilled water once in two months in the case of tubular battery. The module may be cleaned with a wet cloth to remove the dust once a week to ensure proper charging of the battery.

8. What are the uses of solar PV lights ?
Solar lights could be used for a variety of lighting purposes in houses, offices, factories, gardens, parks, streets etc. They are also very useful in remote places for domestic lighting where grid (EB) supply is not available.