Author: Salvesolar

A Single Line Diagram (SLD) is one of the most important engineering drawings in any solar photovoltaic (PV) project. It provides a simplified representation of the complete electrical system using a single line instead of showing every conductor individually. An SLD serves as the backbone of the electrical design and is required during engineering, procurement, […]

High Tension (HT) cable sizing is one of the most critical aspects of solar power plant design. An undersized cable can result in excessive voltage drop, overheating, increased power losses, and even failure during fault conditions. Conversely, an oversized cable unnecessarily increases project cost. In utility-scale solar power plants, HT cables are generally used to […]

A transformer is one of the most critical components in a solar power plant because it enables the efficient transfer of electrical energy from the inverter output voltage to the grid voltage. While solar modules generate DC power and inverters convert it into AC power, the electricity produced is typically at a low voltage such […]

Objective of LT Cable SizingThe objective is to select an XLPE Armoured Aluminium AC Cable that can safely carry inverter output current to the Inverter Duty Transformer (IDT) while satisfying: Thermal limits Voltage drop limits Power loss limits Short circuit capabilityThe sample calculation in the PDF considers 1C × 400 mm² Aluminium XLPE Armoured Cable […]

How to Optimize Solar PV Array Layout (Step-by-Step Guide) Optimizing a solar PV array layout is one of the most important tasks in utility-scale and commercial solar design. A well-optimized layout increases energy generation, reduces project cost, minimizes shading losses, and improves construction efficiency.This guide follows the workflow used by professional solar design engineers. Step […]

What is an HT Panel? In every electrical power distribution system, electricity passes through different voltage levels before reaching consumers. Two of the most important electrical distribution panels are the HT (High Tension) Panel and LT (Low Tension) Panel.Whether it is a solar power plant, industrial facility, commercial building, or utility substation, HT and LT […]

Introduction:Selecting the correct DC cable is one of the most important tasks in solar PV system design. An undersized cable increases voltage drop, power loss, and overheating, while an oversized cable unnecessarily increases project cost.In this article, we’ll learn how to calculate solar DC cable size step by step . The cable selection is based […]

INTRODUCTIONAs solar power plants continue to grow in size and complexity, efficient DC power collection and protection become increasingly important. Components such as the String Combiner Box (SCB), String Monitoring Box (SMB), and Array Junction Box (AJB) play a crucial role in ensuring that energy generated by photovoltaic (PV) modules reaches the inverter safely and […]

Introduction Junction boxes play a vital role in ensuring the safe and reliable operation of solar photovoltaic (PV) systems. They provide secure electrical connections, protect circuits from environmental conditions, simplify maintenance, and improve overall system safety. In utility-scale ground-mounted solar power plants, several types of junction boxes are used, each serving a specific function within […]

String Calculation in Solar PV Systems: A Complete Beginner-to-Professional Guide What is String Calculation? String calculation is the process of determining how many solar modules can be connected in series (called a string) without exceeding the inverter’s voltage and current limits. It is one of the most important steps in designing a safe, efficient, and […]