Insights & guides

OneCalc Blog

Practical guides on conversion, calculation and engineering design. New articles published regularly.

How to Size a Solar PV System Correctly

A step-by-step engineering walkthrough covering load assessment, peak sun hours, performance ratio and module selection.

Understand how exact SI base-unit factors keep conversions precise across length, mass, energy and pressure.

How modern browsers can convert images, PDFs, audio and video without ever uploading your files to a server.

Levelised cost of energy, ROI and payback period — what each metric means for a real project.

Voltage drop limits, derating factors and IEC-aligned conductor selection made simple.

Where live exchange rates come from and how to interpret them for real transactions.

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