# Quick Answer: How do I calculate UPS required capacity?

Contents

## What capacity UPS is required?

For a planned load of 80 kW, a 1.0 PF UPS rated at 100 kVA/100 kW should be sufficient if you keep your loads phase-balanced within about 5%. A UPS with a 0.9 PF will need a higher kVA rating; 125 kVA would give you a 112.5 kW capacity, which also gives you a little additional headroom.

## How do I choose a UPS battery capacity?

You can use the following simple formula:

1. Backup Time (in hours) = Battery Capacity (in Ah) X Input voltage (V) / Total Load (in Watts)
2. If the battery capacity is 110Ah:
3. If the battery capacity is 220Ah:

## What is UPS load capacity?

Measured in “watts”, UPS capacity is an important factor to consider when choosing a UPS (uninterruptible power supply). It determines how many electronic devices the UPS system can support. This post will tell you how to choose the right UPS with required UPS capacity in the following four steps.

## How do you calculate load?

Calculating an Electrical Load in a Simple Circuit

Let Power = Voltage * Current (P=VI). Let Current = Voltage/Resistance (I=V/R). Apply Kirchoff’s Second Law, that the sum of the voltages around a circuit is zero. Conclude that the load voltage around the simple circuit must be 9 volts.

## How do I know what UPS to buy?

The more power that is consumed, the less time the UPS will be able to power everything. When choosing a UPS, it is generally recommended you chose one with an output watt capacity 20-25% higher than the total wattage of the devices you want to connect. You can use the UPS watts calculator to determine your total load.

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## What is the best UPS for home use?

Microtek UPS EB 1700 (24V) Inverter Specifications

Best Inverters for home use Price*
Luminous Zelio+ 1100 Home Pure Sine wave UPS Inverter INR 5,971
V-Guard Smart 1100 Inverter INR 7,499
Luminous Cruze 2KVA/24V UPS Pure Sine Wave Inverter INR 12,200
Luminous Eco Watt +1050 Square Wave Inverter INR 4,800

## How do I calculate the number of batteries I need?

Choose the required number of cells within these two limits (although choosing cell numbers in the middle of minimum and maximum values would be most suited). Choose a battery capacity (Ampere-Hour) that surpasses the minimum capacity computed using the above formula.

Battery Sizing Calculation | Solved Example.

Rated Voltage (V) Cells (Lead-Acid Battery)
125 60