Solar Inverters

NAGPUR SOLAR

Solar Inverters

A Solar Inverter is a device that converts the direct current (DC) from the solar panels into alternating current (AC) which is used by domestic and commercial appliances. It is one of the most critical components of the solar power system as it converts power from the sun into more useful energy and is often referred to as the brain of a solar system. Solar inverters are a crucial part of a solar system since power from the sun cannot be directly used to run electrical appliances. Starting out as just boxes converting DC into AC, today, solar inverters have evolved to become much more smart and intelligent units, performing other functions such as data monitoring, advanced utility controls, etc.

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What is 'VA' in inverter?

VA defined the rating of Inverter. Most of the electrical rating defines in terms of voltage and current (VA) because of AC power factor of current is decided by the load connected. AC Power = V X I X pf. Since the load power factor is not known while the Electrical equipment is manufactured, that’s why the rating of Transformer and other equipment is defined in VA instead of Watt.

Inverter Market Size & Trends

In India, approximately 1crore inverters are selling every year in India. Inverters are being sold which have both normal inverters and solar inverters. A normal inverter means that it will be used for charging of the battery by using electricity only, whereas a solar inverter has the facility of both electricity and solar charging of the battery.

How does Inverter work?

An inverter is like a converter of the power supply DC power into AC power supply. It will take 110V / 220V DC input voltage and convert into AC power supply of 230V, 50 Hz. The inverter also may be three phases or Single phase output AC supply type and also can operate under & voltage condition up to a range of minimum 190V and a maximum of 250V for single phase Inverter.

Basically, a Full bridge or Six pulse converter is used to convert DC voltage into AC voltage The device can produce output voltage, and frequencies are controlled by the inversion process & the output voltage is connected to a transformer matching system it is feeding power into. Thyristor bridges are designed with a combination of diodes/rectifiers in forwarding & revere mode or blocking mode.

Types of Solar Inverters

Based on the required load and space availability for Solar System, you can choose the Solar Inverter. There are the following Solar models described here to understand the working function & that will help you out to choose or invert on the solar inverter.

Basically, three models are there to understand the solar function.

  • Grid-Interactive/ Connected System
  • Off-Grid System
  • Hybrid system

Inverters can be broadly classified into three major types:

i) Off-grid/ Standalone inverters– works independently off the grid and requires battery storage

ii) On-grid/ Grid-tied inverters– are dependent upon the grid

iii) Hybrid inverters – incorporate both battery and grid connection and have an inbuilt solar charge controller

Grid-tied solar inverters are further categorized into micro, string, and central inverters.