Backup Time of Online UPS : How long do they last? | Gennex Technologies
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Backup Time of Online UPS : How long do they last?

Back up time for Online UPS Featured
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In trying to make a choice of online UPS, one very common question that comes up is – “How long can this UPS last?”

This question borders majorly on how long the UPS can power loads being run independent of AC power supply.

Providing a “direct” answer is usually not the case in many instances.

This is simply because several factors come to play in determining the backup time of the UPS when fully charged.

Several factors come to play in determining the backup time of the UPS when fully charged. Click To Tweet

READ ALSO: Product Feature: Gennex 2kVA & 3kVA Online UPS

Before we consider the backup time of Gennex 2kVA and 3kVA online UPS, let’s consider some of the factors that affect backup time and how to calculate the backup time of an online UPS.

Factors that affect backup time of the online UPS

1. Battery Rating

UPS batteries are in most cases lithium ion batteries.

These batteries are designed to store charges for use when there is no longer AC supply from the mains or generator.

Batteries are usually rated in Volts(V) with a corresponding Ampere-hour (Ah) rating.

Online UPS batteries come in various ratings
Voltage and Ampere-hour ratings of batteries vary with UPS types.

2. Number of batteries

The number of batteries within most UPS ranges from between 2-10 batteries. Some UPS have more.
The number of batteries determine how long the UPS system can power loads run on it.

The number of batteries determine how long the online UPS can power loads run on it. Click To Tweet

Battery Capacity of Gennex 2kVA and 3kVA Online UPS
Battery Capacity of Gennex 2kVA and 3kVA Online UPS

3. Efficiency of the battery

The efficiency of UPS batteries differentiates the performance of online UPS of same ratings. That is why two different UPS types rated 2kVA may not necessarily have the same backup time. Battery Efficiency of Gennex Online UPS

Battery Efficiency of Gennex 2kVA and 3kVA Online UPS in AC mode and Battery Mode

READ ALSO: Product Feature: Gennex 2kVA & 3kVA Online UPS

4. Load in Watts (W)

The power rating of the device (appliance) that will be on the UPS determines also how long the it will last without AC supply.

The Online UPS will last longer with lighter loads than with heavy loads.

The Online UPS will last longer with lighter loads than with heavy loads. Click To Tweet

For example, a 2kVA Online UPS with a load of 200W will last about three times longer than another one with a load of 800W.

Backup time of 2kVA Online UPS

Backup time of Gennex 2kVA Online UPS

How to Calculate Backup time

Backup time of UPS (in hours) = [ Battery rating (in Ah) × Battery rating (in V) × Number of Batteries × Battery Efficiency ] / Load in Watts (W).

Formula for Calculating backup time of Online UPS

Formula for calculating backup time of Online UPS

As an example, Gennex 2kVA Online UPS has 4 units of 12V/9Ah batteries. It also has an efficiency of 87% in its battery mode. Therefore with a load of 500W , the backup time of the UPS from the formula above is gotten as:

[ 9Ah × 12V × 4 × 87% ] / 500W = [ 9Ah × 12V × 4 × 0.87 ] / 500W = 375.84Wh / 500W = 0.75168h

Therefore, with a load of 500W, the 2kVA will last for 0.75168 hours ( approximately 45 minutes ).

For example, a 2kVA Online UPS with a load of 200W will last about three times longer than another one with a load of 800W. Click To Tweet

Similarly, with a load of 500W on the 3kVA Online UPS having 6 units of 12V/9Ah batteries and efficiency of 88% in its battery mode, the backup time is obtained as follows:

[ 9Ah × 12V × 6 × 88% ] / 500W = [ 9Ah × 12V × 6 × 0.88 ] / 500W = 570.24Wh / 500W = 1.14048h

Therefore, with a load of 500W, the 3kVA will last for 1.14048 hours ( approximately 68.4 minutes ). This about 52% more time than that of the 2kVA Online UPS.

How simple?

Backup time of 3kVA Online UPS

Backup time of Gennex 3kVA Online UPS

Download the full backup time sheet for Gennex Online UPS here.

The decision to buy a good online UPS should not be an afterthought. Buy online ups systems that can provide optimum backup time for specified loads and that can also serve for a long period of time considering that most online UPS tend to experience a drop in performance over time.

READ ALSO: Product Feature: Gennex 2kVA & 3kVA Online UPS

The price for Gennex 2kVA Online UPS is 112,000 naira while the 3kVA model costs 142,000 naira.

To get this product, call 08091023041, 08171936361 or send a message on WhatsApp.


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