Solar Energy Blog

Long-form technical articles for PV designers, engineers, consultants and serious learners. Each article explains the concept, the calculation logic, the design checks and the common mistakes.

Electrical Design

AC & DC Voltage Drop — Complete Engineering Guide

Formulas, R/X, power factor, temperature, phases, voltage-drop limits and worked examples.

Read detailed guide →Cable Engineering

DC & AC Cable Sizing — Complete Design Workflow

Design current, derating factors, ampacity, voltage drop, material and final verification.

Read detailed guide →System Design

PV System Sizing — From Energy Bill to DC Capacity

Daily energy, daytime load, PSH, PR, losses, DC/AC ratio and design sanity checks.

Read detailed guide →Solar Resource

GHI, DNI, DHI, GTI & PVOUT Explained

What each resource variable means and how to document it for PV modelling.

Read detailed guide →GCC Engineering

Soiling in Gulf Solar Projects

How dust changes yield, loss assumptions, cleaning strategy and design review.

Read detailed guide →Software

PVsyst vs HelioScope — How a Designer Should Use Both

Layout, stringing, simulation, assumptions and cross-checking between tools.

Read detailed guide →Saudi Arabia

Solar PV Design in Saudi Arabia

Heat, soiling, rooftop constraints, resource, electrical and documentation considerations.

Read detailed guide →System Architecture

DC/AC Ratio — Why PV Arrays Are Oversized

Understand clipping, inverter loading, energy yield and project-specific optimization.

Read detailed guide →