Nowadays, power outages are so common in Chennai, and hence some alternative power sources have become truly necessary here. Inverters are the most widely preferred power alternatives in houses. If you are on a hunt for an inverter for a home in Chennai, this write-up would help you make the right choice. So, how to select an inverter which gives the best value for your money? Let us get into the details step by step!
Understand how much power you require
First and foremost, you must have a clear idea about the power requirement in your house. How many appliances do you want to work during power cuts? Take a list and find out the power consumed by each of the appliances. Add up the power of all the appliances to find out the total power required (in Watts).
Consider you have 2 fans of 70 watts each, 1 tube light of 40 watts, 1 TV of 70 Watts, 1 refrigerator of 140 Watt, then:
Total power required= (2*70) + (1*40) + (1*70) + (1*140) =390 Watts
Calculate the capacity of the inverter you require
The capacity of the inverter you choose should always be greater than the total power requirement by a certain percent. The capacity of an inverter is expressed in Volt-Ampere (VA). The ratio between the power requirement in Watts and the VA capacity of an inverter is called power factor. The power factor considered for houses is usually 0.7. So, in order to find the capacity of the inverter which you need you have to divide the total power in watts which you obtained in the first step by the power factor, i.e., 0.7.
Considering the example taken in the first step,
Inverter capacity = 390/0.7 =557 VA
So, an inverter with VA rating 600 or more would be fine for your house.
Find out the required battery capacity
The time for which back up can be provided depends greatly on the capacity of the battery. The battery capacity is measured in Ampere Hour (Ah). It can be calculated as shown below.
Battery capacity = (Inverter power in Volt Ampere * Required backup in hours)/ Voltage of the battery in volts
Considering a battery voltage of 12 volts and a backup time of 3 hours,
the battery capacity = (557*3)/12= 139 Ah
It is always recommended to go for 5 to 10 percent additional capacity. Hence 145 Ah battery would be sufficient for your home.
Make a choice between the different types of batteries
Different types of batteries are available. Lead acid batteries are the ones most commonly used in houses, and they come in two forms; flat plates and tubular plates. Flat plate ones are available in small-sized containers, and they are fine for those areas where power cuts are less. Tubular plate batteries are available in small as well as large-sized containers. They have comparatively longer life and can be used in all type of areas.
Consider these miscellaneous factors
In addition to the above-listed points, there are few additional factors which you must consider. They are,
Doing calculations and analysis of the features as described above would help you to get an overall idea of the inverter you require. A technical person would be able to provide you with additional help required in fine-tuning your selection. So, do not hesitate to discuss your doubt or concerns with your dealers They would be able to give you good suggestions which can help you make a perfect choice!