Solar Cable Size Calculator
Find the right cable size for your solar system current.
About the Solar Cable Size Calculator
Numbers should not slow you down. The Solar Cable Size Calculator does the arithmetic for you and shows the result live, so you can focus on the decision rather than the maths.
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.
The Solar Cable Size Calculator is one of a large, connected suite of Pakistani calculators on GuruAlpha, so if a related figure comes up next, the tool for it is a click away.
How to size a solar inverter
- 1
Enter your peak simultaneous load in watts or kW.
- 2
Add margin for surge loads from motors and compressors.
- 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.