Power of the generator

How to determine the power of the generator set?

The first thing that must do before buying a generator is determining the power that you need. Whichever power you are interested in, prime or standby, if your generator does not satisfy your consumption, this situation will lead your generator to be badly affected. Determining the power of the generator requires some researches on some factors. 

Some terms like monophasic, three phasic, kW, kVA, prime, standby can be confusing. This article has been prepared to enlighten important issues on determining the power of the genset and avoiding you from confusion. Even if, it cannot give information as a certificated technician, it may help you on some key points.

Generator Power Range: Following the innovations on electrical engineering, generators have a wide range. While the industrial generators are 50kW-3 MW; 5kw -50 kW generators are used in houses and offices.  

Generator Power: Many people think that a smaller generator power would be sufficient when it is not used continuously and standby power would be a good choice. Unfortunately, this is one of the mistakes made by customers and it leads both your generator and your equipment to be affected badly. The main point is that the power of the generator must be chosen much than the power needed.


How to choose the right power? : It would be a good start to follow the instructions below, even if it cannot help you like a certificated electrician:


Know your requirements well:  It is not a good way to buy the best or the cheapest generator set from the market. It is better to know your requirements in details. You can do it by following steps:

- List the devices that will be fed by the generator

- Note the standby and continuous power that operates each device

- Calculate the required powers in kVA or kW.


How to determine starting and operating Powers?

Normally, these kinds of information can be found on the plates or user’s manual of the item. 

Ampere - Watt Converting: You usually see the power requirements of the devices in ampere.  You can use the following formulae to convert ampere into watt.

Watt = ampere x volt

Power = (ampere x volt) x power factor