14/08/2026
ENGINEER, this is one of the most misunderstood things in solar, especially now that many Itel inverters are rated in kW while many traditional inverters are rated in kVA.
The short answer is:
kW (kilowatt) tells you the real power the inverter can deliver to appliances.
kVA (kilovolt-ampere) tells you the apparent power, which includes both useful power and reactive power.
Let me explain it the Mama Amanda way.
Engineer, Why Is One Inverter Rated in kW and Another in kVA?"
One afternoon, Mama Amanda called me again.
“Engineer, I saw two inverters.
One says 5kW.
The other says 5kVA.
Which one is bigger?”
I asked:
“What appliances do you want to power?”
She replied:
“Freezer, lights, TV, fan, and maybe a pumping machine.”
I smiled.
“Mama Amanda this is where many people get confused.”
Because in electricity:
kW and kVA are not the same thing.
Think of a Truck
Imagine a truck carrying bags of rice.
The truck has a total carrying capacity.
But not everything it carries is useful cargo.
Some space is occupied by packaging, ropes, and containers.
The total carrying capacity is like kVA.
The actual rice delivered is like kW.
What kVA Means
kVA means kilovolt-ampere.
It is the apparent power.
It represents the total electrical power flowing through the inverter.
This is why many traditional inverter manufacturers - especially industrial and transformer-based brands - rate their inverters in kVA.
What kW Means
kW means kilowatt.
It is the real or useful power that actually does work.
This is the power that runs:
Your freezer
Your TV
Your fan
Your lights
Your pumping machine
Modern high-frequency and lithium-focused brands, such as many Itel inverters, often rate their products directly in kW because that is easier for customers to understand.
The Hidden Relationship
The connection between them is:
kW = kVA × Power Factor
For many inverters, the power factor is 0.8.
So:
5kVA × 0.8 = 4kW
3kVA × 0.8 = 2.4kW
This means a 5kVA inverter may actually supply only about 4kW of real power.
Why Many Itel Inverters Use kW
Many newer Itel inverters are designed with a power factor close to 1.0
That means:
5kW ≈ 5kVA
3.6kW ≈ 3.6kVA
Instead of advertising apparent power,
they advertise the actual usable power.
This makes comparison easier for homeowners.
A Practical Example
Suppose you have:
Freezer = 400W
TV = 100W
Fan = 80W
Lights = 120W
Total load = 700W
A 1kW inverter can comfortably handle it.
A 1kVA inverter with power factor 0.8 can supply only about 800W.
Notice that 1kVA is not equal to 1kW.
Quick Comparison
| Inverter Label | Real Power Available |
| 1kVA | About 800W |
| 2kVA | About 1.6kW |
| 3kVA | About 2.4kW |
| 5kVA | About 4kW |
| 5kW | About 5kW |
Final Answer
Some inverters are rated in kVA because manufacturers are specifying the inverter’s apparent power capacity, while many modern inverters such as Itel are rated in kW because they are specifying the actual usable output power.
When comparing two inverters, always check the power factor and the real output power, not just the number printed on the front.
A 5kW inverter is generally more powerful than a 5kVA inverter with a power factor of 0.8, because the 5kW unit can deliver about 1kW more usable power to your appliances.
I am BAKO SIMON SAJO
On a mission to Transform Power Challenges into Reliable Light in Africa.
Follow me If you want to avoid expensive mistakes and learn how solar really works, real-life tips, explanations, and insights on solar and renewable energy.
No noise just real knowledge.
If you find my teaching helpful comment "I'm Learning" and press the share button to benefits others. Let's Learn and grow together.
God bless you.
BAKO SIMON TECHNOLOGIES SOLUTIONS
