How To Select Right Ups Power Inverter For Home?

Hot summer is coming in just few weeks; planned and unplanned power failures are possible as usual. In India this power failure ranges from 3 to 4 hours in cities and 7 hours or more in small towns and village. This create miserable situation in managing daily life, hence need of inverter take place. Inverters are one of the most demanding products of summer. But selecting the right UPS Inverters for home is nowadays becomes a difficult task. It is imperative to consider what facilities will be protected. We must also choose the appropriate batteries for this inverter, those that can be more or less autonomy.

What to UPS or UPS?
It's one of the questions that customers often ask. UPS (Uninterrupted power supply) and the inverters are names used interchangeably, even if they do not do exactly the same thing. The UPS is just a system that allows switching backup power instantly in case of power failure. The inverter converts direct current into alternating current, using a battery, provides the ability to save equipment operating on AC power. Some are equipped with an internal battery that allows you to make backups for 15-30 minutes. It is possible to change to a battery that provides more autonomy.

What UPS capacity?
Once you are on the UPS you need, it is important to calculate the capacity you need for your installation. The following table gives a brief idea of the energy consumed by different facilities:

Appliance                    Power
Fluorescent Light            60 W
Fan                               70 W
Laptop                           100 W
Television                      120 W
Modem                           50 W
Refrigerator                    200 W

Now you are in the ability to understand what the inverter is adjusted to your needs. Calculate your power needs necessary for both an inverter fluorescent tubes, three fans, a TV, a refrigerator and a laptop. With the above table, we need a 750W power (= 2X60 + 3X70 + 1x120 +1X200 + 1X100) to support all devices simultaneously.

Calculate the capacity of the inverter
Now that knows have the required power, it is easy to know the capacity we need. Under ideal conditions, the VA (volt ampere) UPS should meet its power demand (by 750), but for practical issues, we always take a higher amperage. Assuming the inverter power factor is 0.7, here are the details of the calculation: - VA required for inverter / 0.7 = 750 / 0.7 = 1071VA. We can choose 1100VA inverter.

Battery capacity
We must now save data and calculate how many hours of autonomy are in range. The battery is the element that determines the backup times and is expressed in terms of Ampere Hour (Ah).
The calculation: Power X hours = Volt;
Battery capacity for 3 hours playback 750W X 3H = 12V.
Battery capacity = (750 x 3) / 12 = 187 AH.
It takes a battery of 187 Ampere hours.