What happens if it is Cloudy?

Electrical energy is stored in the battery each day, and some of that energy is used to operate the light at night. We at ARRS configure your system so that the battery will operate the light for 3 nights without charging. This means that, even after a series of cloudy days, there will be plenty energy in the battery to power the light each night. Also, please note that the solar panel WILL continue to charge the battery (although at a reduced rate) even when it is cloudy.

How much can I save?

The savings in terms of absolute cost is dependent on:

• the size of the solar panel that you have installed
• amount of electricity you would have normally consumed

To give you an idea, a 2kW PV system which is replacing grid electricity at Rs.5.50 / kWh might save Rs.16, 000 / year.

Do we need to turn on / off the light manually?

No. All our solar lighting solutions are equipped with a controller unit that would automatically turn on / off the lights. This is because the solar controller utilizes an internal timer that is pre-set for a specific number of hours to determine when to switch the light off. If the solar controller is set to leave the light on until dawn, it determines when the sun rise (and when to switch the light off) by means of voltage readings from the solar panel array.