Inverter is a type of electronic power generator which convert low volatge direct current(DC) from a battery to a high voltage alternating current(AC).Power failures can be really very frustating at times,especially during the night time.Inverters will help you to cope up with the balckout and do away with your problems.Choosing a right inverter and battery is not very easy.
Load Calculation: First of all calculate your Power Consumption.This can be done by adding up the Watts(W) of all loads(CFLs,TV..), to be powered by the inverter.For example one 20W CFL + one 60W TV =20+60 =80W.
Inverter Capacity: Nexr select the Volt-Ampere(VA) rating of Inverter. VA=WattsxPower Factor.Power factor value varies from 0.6 to 0.8.Note that a 600VA rated inverter (with power factor 0.8) delivers approximately 480 Watts only!
Inverter Type: Square wave,Quasi- Sine wave and Pure Sine wave inverters are now available.In practice,sine wave is the correct waveform on which all electronic equipment, including televisions and computers are designed to run.
Battery Selection: Battery is the back bone of any inverter.Usually 12V battery is used with home inverters.Tubular type storage batteries are recommended for inverters because they are capable of long hours of guaranteed backup time.Backup time is simply the number of hours for which an inverter will be able to run the output electric load during power failure.Batteries are available in different volatge and Ampere-Hour (Ah) ratings.Backuptime is mainly determined by this Ah rating of the battery.Tubular batteries have higher capacity-to-size ratio.These types can be recharged faster and are energised to deliver incresed power and and higher efficiency.
Backup Time: Formula to Calculate the backup time of Inverter is Ahx12VxPFx0.9/Load VA hours.Where Ah is the ampere-hour capacity of the battery,PF stands for the power factor of the inverter and load is the sum of VA ratings of the electrical loads connected to the inverter.
Quick Selection: 800VA sinewave inverter with a 130 Ah tubular battery for a maximum backup of near 3 hours @600Watts.
Warning: Before taking any action based upon advice and/or information contained in this article,you should carefully consider the advice and information and consider obtaining relevant independent advice.
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