How to Choose Solar Panels

View：1252026-11-11 13:43:24　From: Looking for Solar Panel Production Line?

Introduction to Solar Panels

A solar panel is a device that absorbs sunlight and converts solar radiant energy directly or indirectly into electrical energy through the photovoltaic effect or photochemical effect. Most solar panels are mainly made of silicon, and their primary function is power generation. Many people have trouble choosing solar panels. This article briefly introduces relevant knowledge for selecting solar panels for your reference.

Classification of Solar Panels

Currently, solar panels on the market fall into amorphous silicon and crystalline silicon types. Crystalline silicon is further divided into polycrystalline silicon and monocrystalline silicon. In terms of photoelectric conversion efficiency: monocrystalline silicon (SunPower, up to 22%) > polycrystalline silicon (18%).

How to Select Solar Panels

1. When purchasing solar panels, the key indicator to focus on is the power of solar cells. Generally, the power of a solar panel is proportional to the area of its solar cells. The area of solar cells is not equivalent to the overall area of the encapsulated panel. Some panels look large in size, yet the gaps between cells are wide, so they may not deliver high power.
2. Higher power is not always better. High-power panels generate larger electric current under sunlight and can charge the built-in battery quickly. In practice, however, you need to strike a balance between power output and portability.

Tips for Selecting Solar Panels

With the wide application of various solar products, solar panels are increasingly used in daily life. Faced with numerous types of solar panels on the market, how should we choose? Below are practical selection tips.

1. Selection of Battery Capacity for Solar Panel Systems

Since the energy input of a photovoltaic power generation system is unstable, a battery energy storage system is generally required for normal operation. This also applies to solar lamps. The capacity of batteries directly affects system reliability and cost. The general principle for battery capacity selection: on the premise of meeting night power demand, store as much electricity generated by solar modules in the daytime as possible, and reserve sufficient power for night use during consecutive rainy days. If the battery capacity is too small, it cannot satisfy nighttime power consumption. If the capacity is excessively large, the battery will stay undercharged, which shortens its service life and causes unnecessary cost waste.

2. Selection of Solar Panel Power

The rated output power of a solar panel is measured under standard test conditions (STC): irradiance of 1000 W/m², air mass AM1.5, and cell temperature of 25℃.

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