What is the differance between KVA and KW in electrical terms ?

In AC power systems, capacitance and inductance can affect the synchronicity of the voltage and current phases. When these values are out of phase with one another, three types of power arise. Let us think about it as legs to a right triangle. The adjacent leg (or x-component) would be the actual power consumed by the load, called the real or true power. The opposite leg (or y-component) would be the reactive load caused by any capacitance or inductance in the circuit. This is called the reactive power. Real load is measured in Watts, while reactive load is measured in VA, or volt-amperes. When these two components are vectorially added, we get the apparent power of the load, also measured in VA. The K is simply the abbreviation for the prefix kilo-.