The kva are a unit of power that is equivalent to a thousand amps.
When we have the power in kva, we are giving the sum between the “useful” power (kW) reactive power, which indicates the consumption or total power input.
How many Kva i need?
First of all we have to know the consump units and the equivalent to Kva
The consump units: This units indicates us the electricities need of every electrodomestic, most of them has a consump table
Watios (w) y los kilovatios (kw)
Watt (w) and kilowatt (kw)
Exanple: 200W= 0,2 Kw
To convert Kw to Kva, divide it by Cosine Fi (Φ) which is 0.8:
0,2/0,8= 0,25 kva
Knowing these equivalences we can know that the average power required according to the average consumption calculated by http://shrinkthatfootprint.com
For medium family in France we will need at least 8 Kva
We recommend to have a Margin of 20% so for this example it is necessary to acquire a team of 9,6 kva
How to know my consump?
To calculate the exact consumption of a house is necessary to know the consumption of the electrodomestic
In our house we have
The total is 2400 W or 2.4 Kwa
What equals 3 kva, under our recommendations for ideal would be to buy at leat a 3.6 kva generator