How Solar Panels Work — The Complete Guide

Inside a Solar Cell

Every solar panel is made up of multiple solar cells. A standard 400W panel contains 60–72 individual silicon cells. Understanding what happens inside a single cell explains the entire technology.

A solar cell is a sandwich of two types of silicon:

The junction between these two layers creates an electric field. When a photon (light particle) hits the cell with enough energy, it knocks an electron loose.

Types of Solar Panels — Which is Best for India?

For Indian rooftops — particularly in Hyderabad where summers are intense — monocrystalline panels from Tier-1 manufacturers (Trina, LONGi, Jinko, Waaree, Adani) are the right choice.

The Inverter — Brain of the System

The inverter is arguably the most important component after the panels themselves. Its job is to convert the DC electricity from your panels into AC electricity your home can use.

The most common type. All panels are connected in a series "string" to a single inverter. Cost-effective and easy to maintain. Works best when panels are all in the same orientation without shading.

Each panel has its own small inverter. Much more expensive but eliminates shading losses — one shaded panel doesn't affect the rest. Good for complex rooftops with multiple orientations.

Combines a solar inverter with a battery charger/manager. Allows you to add battery storage now or in the future. More expensive upfront but essential for hybrid systems.

Panel Lifespan and Degradation

Solar panels are designed to last 25–30 years. However, their output gradually decreases over time — this is called degradation.

The inverter typically lasts 10–15 years and may need replacement once during the system's lifetime. LavishRays specifies inverters with 5–10 year warranties and advises on expected replacement timing upfront.