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Solar Inverter Size Calculator

Calculate the inverter capacity needed for your solar panel array.

Solar Inverter Size Calculator

Solar Inverter Size Calculator

Results

Array Size6.6 kW
Inverter Size6.6 kW
AC Output / Day (Lahore)24.8 kWh

About the Solar Inverter Size Calculator

The inverter is the heart of a solar system — it converts DC power from panels and batteries into the AC power your appliances use. This Solar Inverter Size Calculator sizes the inverter from your peak simultaneous load.

The calculation matches the inverter's continuous rating to your running load, with headroom for surge loads like refrigerators and water pumps that draw more at startup.

In Pakistan, hybrid inverters combine solar, battery and grid input, letting the system switch seamlessly between sources. Sizing must consider both the solar array and the loads it powers.

A common mistake is matching the inverter to the solar array only, ignoring the load. If your peak load is 4 kW, a 3 kW inverter will trip regardless of how many panels you install — size from the load.

How to size a solar inverter

  1. 1

    Enter your peak simultaneous load in watts or kW.

  2. 2

    Add margin for surge loads from motors and compressors.

  3. 3

    Read the recommended inverter rating, updated live.

Frequently Asked Questions

Can an inverter be smaller than the array?

Yes — a 1.1–1.3 ratio is normal. A 12 × 550 W array (6.6 kW) commonly pairs with a 6 kW inverter with minimal clipping.

How do I choose between a 5 kW and 10 kW inverter?

Match the inverter to your peak load, not the panel count. A home with two ACs needs a 8–10 kW hybrid inverter; one without ACs may manage on 3–5 kW. This calculator sizes from your actual load.

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