PV, short for Photovoltaic, derives its name from the process of converting light (‘photo’) directly into electricity (‘voltaic’). Simply put, a Solar PV system is a power station that generates electricity from sunlight.
Yes, solar power today is cheaper than grid power for majority consumers across most states. Moreover, solar is a one time investment while grid tariff keeps increasing every year. Therefore, by choosing to go solar today, you are locking in a fixed energy price for the next 25 years.
120 sq. ft. of shadow-free area is required per kW of solar capacity. The number of solar panels is decided based on your electrical load and roof area available, Each solar panel produces 320 - 350 Watt of peak power.
The solar system typically weighs approximately 15-20 kg/sqm. and well within the safety parameters of your RCC or metal roof.
As a rule of thumb, a 1 kW solar system produces an average of 4 units (kWh) of usable electricity a day, or 1,460 - 1,500 units a year, subject to geographical location of your building, orientation of the roof and ambient weather conditions. Yes, your solar PV system supplies current to your main distribution board at the same voltage and frequency as the power grid, ensuring all your connected loads can operate from the electricity produced by your own solar PV system seamlessly.
Using the above rule, for a consumer with a monthly usage of 1,000 units of electricity, a 5kW solar plant will reduce your electricity bill by 60%.
The output of the solar plant varies as the sun moves across the sky, and as clouds move across the sun. Therefore, during non-sunshine hours like late evenings and nights, solar production shall be nil. Also, during the periods of dark cloud coverage and rainfall, solar production shall be minimal. In the case of grid failure, your on-grid solar system automatically shuts off as an important safety feature considering any workers attempting to fix power outages. However, SunAlpha provides inverters that also synchronise with your backup power source such as diesel generator and continue to function even during power failure.
Your solar inverter is connected in parallel and synchronised to your grid electricity supply at your main distribution panel. During low or nil solar production, your connected loads continue to receive uninterrupted supply from the power grid.
Through net-metering, all excess (unconsumed) solar units produced are automatically fed into the grid using a net-meter (that replaces you existing meter) and are accounted for either as credit to the following billing cycle or as cash adjustment in the current bill. For example, if on a given day you generated 20 units from solar and consumed only 18 units, the balance 2 units will be sold back to the grid.