**Contents**show

## 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:**

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

## 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.

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Battery Sizing Calculation | Solved Example.

Rated Voltage (V) | Cells (Lead-Acid Battery) |
---|---|

125 | 60 |