I Finally got the Best Ups After Changing too many ups.It is a great Ups imported from china called proton.It has a Lcd which shows Battery Time and Load.it is available in 1.2kva,2kva and 3kva(pure sine wave).I bought 1.2kva/700 watts almost for 16,500,it can hold the following Load
1pc or 2tvs
6 energy saver 25 w or 4 tube lights
3 ceiling fans
It can give you 3 hours backup time on full load and 5 to 7 hours on half load with 195 Ah Ags Battery which costs arround 10,000 these days,charging time is good 6 to 7 hours on full discharge.If your battery is full discharged,charge the ups for 2 hours ,it will give u 1 hour minimum backup time more.It is a best Ups i have found after experiencing the dozen of ups.Several things I have examined while experiencing those ups which are as under
The formula to calculate backup time is Volts x Battery Amp Hours / Watts ,for example if you have 195 Ah Battery and u want to run one pc with moniter only then it will be like this 12volts x195ah ÷ 350 watts=7 hours approx.
I might be wrong but i guess i am not as i checked and examined this formula several times.Keep in mind that a pc consumes 250 to 350 watts,depends whether its with Lcd or Monitor,lcd takes less watts,ceiling fan takes 80 to 100 watts and 17 to 24 inch tv takes 90 to 130 watts.
I am very much satisfied with this ups.i have bought 1 then i bought 5 more for my friends n relatives.This ups comes with 1 year warranty of all parts including Transformer.If anybody in rawalpindi/islamabd interested can contact or visit
Mr Nazim
Habib & co
College road Rawalpindi
ph #5557231
Hes very nice and co-operative guy.
I hope there are all answers in this detailed post.
Best regards