Monday, May 9, 2011

Invertor - Power backup

I was thinking from long time to have an Invertor at home, since we experience power cuts, especially in my street, with my line, more than anyone else in Bangalore, as far as i guess.

After so many sleepless nights with my ... mosquitoes I was so tired that I thought would spend any amount to have an Invertor @ home.  Usually the power goes in the midnight and I wake up abruptly, then spending the rest of the time full of frustation and cursing the power station in all the possible languages that I can think of. So, rather than this semi adventorous ride, I thought to have a backup which makes life easier in those midnight stands.

I basically being a Scorpio (sun sign) do lot of research before jumping to buy any product. So, when I decided that I need to buy an invertor (after 2 long years), then I spent rest of 2 month doing research what to buy and what not. Initially I was confused between UPS and Invertor. Then I found the difference that UPS is for shorter span, which throws pure Sine wave, especially usefull for Computers, where there shouldn't be even a fraction of a second of gap between the power off time and the UPS power generation time, but when we come to Invertors, there is a known fraction of second gap which is perfectly fine as this is mostly used for house hold things.  But, due to the advancement in technology we can even see the Invertors trying to cope with the UPS factor of power re-generation at those fractions of second.

How to decide What to buy?  This became the biggest question for me then. Well, then I started with my usual research of asking people, calling justdial and getting few phone numbers and doing enquiry and surfing in net and lot other stuff. Finally after lot of research I found the following precious information.

1) What all things are required? - An Invertor, A battery (which stores the power & acts as a backup) and an Invertor stand(optional)


2) An Invertor - There are many brands of invertors, but the biggest question was what power of Invertor should be purchased. For this you need to calculate the total output Wattage of the electrical appliances in your home, for which you would like to give backup and depending on that the invertor should be chosen. For example, 
     a) 1 Fan - 110 watts
     b) 1 Tubelight - 45 watts
     c) 1 CFL (bulb) - 25 watts and so on...
So calculate as to how many things you would like to get backed up and sum all of them. What ever I've mentioned above with the wattages are approximate. So, for me I would require 2 fans, 4 lights essentially. Now, if there no usage of 2 lights and 1 fan, I can use them to turn on my TV which requires more wattage. 


Finally, when you sum everything and come to a desired number, the invertor that you take, should have 80% wattage matched with the sum that you've arrived. So, for example, if your total sum came to 800 watts, then your invertor capactiy should be 1000watts (1Kw).  Remember, that always the Invertor gives you 80% of the total capactiy of its output.


3) A Battery - I was literally crazy to decide on this.  My main concern was which capacity to take. Basically it starts from 100ah and goes up. Now again in this we have two kinds called "Semi-tubular" and "Tubular".  After doing lot of research I found that as the ah increases the more backup time you get. So, I decided to take 135ah Exide Battery, even though 100ah is minimum requirement.  Mine is Semi tubular battery and the basic difference between this and Tubular is the number of years of warranty as well as the make.  Tubular is SMF (Sealed Maintenance Free) but has poor performance but long life and for semi its vice versa.


4) A Trolley - This is optional which you'll get, but if you prefer for high end batteries, they won't fit in the trolley.


So, finally following is the configuration which I've chosen for my 1BHK house, wherein I require backup for all the bulbs and fans basically.


875watts Invertor - Microtek
135ah Battery - Exide
1 Trolley


and the total costed me around Rs.16,300/- after lot of bargain and bargain and bargain.... This is the lowest best price that we can ever get for the above configuration with 2 years of free service.


Happy Lighting...!!!