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Solar Cable Size Calculator

Find the right cable size for your solar system current.

Solar Cable Size Calculator

Solar Cable Size Calculator

Results

Current30 A
Recommended Cable6 mm²
Voltage Drop (est.)1.75 V

About the Solar Cable 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 Cable 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

What cable size do solar systems use?

6 mm² for most DC runs up to 35 A, 10–16 mm² for larger arrays or long runs. Keep DC runs short — voltage drop eats output.

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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GuruAlpha is a comprehensive digital platform offering live financial markets, free calculators, online tools, Islamic content, SIM packages, sports updates and celebrity profiles for Pakistan, Gulf countries and worldwide audiences.

Is GuruAlpha free to use?

Yes, GuruAlpha is completely free. All calculators, tools, market data, prayer times, Islamic resources and content are available without any subscription or sign-up.

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Yes, GuruAlpha provides live market data including USD/PKR exchange rates, gold prices, cryptocurrency prices, stock market indices and commodity prices sourced from reliable financial data providers.

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GuruAlpha offers over 1,200 calculators including Pakistan income tax, salary tax, PTA mobile tax, electricity bill, gold price, currency converter, Zakat calculator, property tax and many more.

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Yes, GuruAlpha provides accurate prayer times for over 100 cities worldwide including Fajr, Dhuhr, Asr, Maghrib and Isha times. We also offer Qibla direction, Islamic calendar and Zakat calculator.