Inverter Size Calculator for Nigeria
Select the appliances you plan to power at the same time. This calculator considers normal running power, startup surge, power factor and inverter surge capacity.
1. Select Inverter Type
2. Add Your Appliances
Add the appliances you expect to use at the same time. You can change the running and surge watts to match your actual appliances.
Understand Your Inverter Recommendation
The inverter is the part of the system that supplies power to your appliances. The calculator focuses on what you want to run at the same time.
Why did the calculator give me this result?
We consider normal running power and the extra power some appliances need when they start, then compare that demand with practical inverter sizes.
Learn the technical details
kW describes real power used by appliances, while kVA describes an inverter's apparent power capacity. The exact relationship also depends on power factor and the inverter manufacturer's specifications.
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Inverter Calculator FAQs
Common questions about choosing an inverter size for a solar system in Nigeria.
What does the inverter calculator help me work out?
It adds the running power of your selected appliances and considers estimated starting or surge demand to suggest a suitable inverter size. The result is a planning guide, not a final equipment specification.
What is the difference between watts and kVA?
Watts describe real electrical power used by appliances, while kVA describes an inverter’s apparent power capacity. The relationship depends partly on power factor, so an inverter should not be selected by simply treating kVA and watts as exactly the same thing.
Why does my refrigerator or freezer affect the inverter size?
Motors and compressors can draw more power when starting than they use during normal operation. That starting demand can affect the inverter size even when the appliance’s normal running wattage looks small.
Can a 5kVA inverter power everything in my house?
Not necessarily. It depends on the total running load, starting loads and which appliances you want to run at the same time. Large air conditioners, electric cookers, water heaters, pumps and other high-power loads can quickly use a large part of an inverter’s capacity.
Does a bigger inverter always mean a better solar system?
No. An oversized inverter can increase cost without solving the real problem. The inverter should match your expected load, starting demand, battery system and future needs.
What should I check after getting an inverter size?
Use the result as a starting point for the battery and solar panel calculations, then check current inverter prices in Nigeria. Always confirm the final inverter’s continuous output, surge rating, battery voltage and other specifications before purchase.