# What size UPS power supply do I need?

## What size UPS power supply do I need?

When sizing a UPS for your specific requirements, the power factor matters most. Generally, your UPS should have an Output Watt Capacity 20-25% higher than the total power drawn by any attached equipment.

## How is sizing of a UPS done?

Because UPS systems are rated by VA or kVA ratings, this may require a conversion from W to VA, which can be calculated by dividing the power consumption (W) by the power factor. Add up all the VA, then multiply this by a figure such as 1.2 or 1.25, which factors in future growth and system expansion.

How much can 1 kVA UPS take?

For example, 1kVA UPS from N1C has the capacity to power 900 watts of connected equipment. This means the UPS has a “power factor” of 0.9. Other, more inefficient UPS systems may have a power factor of less than that (0.8 or 0.75, etc), meaning they will power less than 900 watts of connected equipment.

### How do you size 3 phase UPS?

To size a three-phase UPS the total kVA per phase must first be calculated and then compared to ensure balanced load sharing across the phases. The maximum kVA per phase should then be used to size the overall UPS. For example if the maximum load is 10kVA then the UPS should be sized for 30kVA (3×10kVA).

### 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.

How do I know what size UPS battery I need?

To determine a battery size one has to first calculate the load current of the UPS and then multiply it by the runtime factor. Load Current for x hours = Answer multiplied by x hours = closed battery size in Ah. Once this is derived the closest battery size for the power can be easily determined.

#### How many watts is 1KVA?

1000 watts
Electrical Power Calculators

Calculation Guide to Standard Uints
Converting kVA to kW KiloWatts (1000 watts = 1 kW) kW
Converting kW to kVA Ampere (Volt-Amperes or Current) I
Converting kW to HP Volts E
Amperes when kVA is known Power Factor PE

#### What is 1 KVA in amps?

1,000 Volt-Amperes
1 kVA is a frequently used unit; it represents 1,000 Volt-Amperes….kVA To Amps Calculator (With Table)

kVA (Apparent Power) Voltage (220 V) Amperage (A)
How many amps is 1 kVA? 220 V 4.55 Amps
How many amps is 5 kVA? 220 V 22.73 Amps