Generator Sizing KVA Power Calculator

Determining the proper size of the generator is essential and requires good knowledge of electricity and the load of the appliances that require power. It is also important for a successful installation. To calculate the kilowatts, you must first determine the starting amperage from each appliance's manufacturer's data plate. Then use the following formula to calculate the kilowatts.

Once you know the watts, you can easily calculate kilowatts by multiplying the total watts by 1000. While choosing the output of the generator, always opt for ratings that are approximately 25% - 30% higher than the load. For example, if your total wattage is around 20 kilowatts, then choose a generator that is 25 kilowatts. The Generator Power Consumption Calculator that Sulekha offers helps you calculate the accurate size of your generator.

It is important to buy the right sized generator to avoid many problems. You should be careful not to buy a generator that is too big for your needs or too small for your needs. An incorrectly sized generator produces unwanted noises and causes much damage to the electrical devices connected to it.

• It causes severe damage to all the electrical systems.
• It leads to unwanted operational costs.
• It fails to produce efficient power.
• Consumption of more fuel.
• High maintenance costs.

• It gets easily damaged due to excess power usage.
• It gets overheated quickly.
• There is not a sufficient or reliable power supply.
• Failures in security systems.
• There is a constant voltage drop and a slow current supply.

There are numerous ways to calculate the KVA of a generator based on the values you have.

• When the voltage and current rating are known, then use the formula P(KVA) = VA/1000
• When the voltage and output resistance is known, then use the formula P(KVA) = (V^2/R)/1000
• When the power in watts and the power factor are known, then use the formula P(KVA) = P (watts)/pf

If you are still confused, use Sulekha's generator power consumption calculator to clear all your doubts.

The fuel consumption can be calculated by multiplying the energy consumed (kWh) by 0.27. Generally, the fuel consumption for a small diesel generator would be around 0.3 liters per kWh, and for a high-speed, diesel modern generator with over 900 KW, then the fuel consumption would be approximately 0.26 liters per kWh.

To calculate the generator power, you need to check the power rating in watts for each appliance using which you could easily calculate the total generator power requirement for your house. Instead of the power, if you step on the current rating, you could use Sulekha's generator power calculator to estimate the total generator power you will require for the house.

The wattages given here are the approximate values subject to change as per usage and circumstances.