Inverter

Solar inverter

A solar inverter is a device capable to convert direct current (DC) into alternating current (AC) electricity. Inverters are one of the most important components of solar power systems since solar panels generate DC electricity and most devices used in homes and offices operate on AC voltage. Inverter technologies have advanced significantly, such that in addition to converting DC to AC, they provide a number of other capabilities and services to ensure that the inverter can operate at an optimal performance level, such as auto-wakeup, Maximum Power Point Tracking (MPPT), over voltage & over current handling, remote monitoring, monitoring weather parameters (humidity, wind, velocity, insolation level, temperature), etc. [Source: Youtube] [Publisher: EnergyX: Sustainable Energy: Design A Renewable Future] Like this:Like Loading... Read more

What are different kinds of inverters used in solar power plants?

Broadly, the solar inverters can be categorized in the following types: Grid Connected Inverters Grid connected inverters are simply inverters which are connected to the grid. These inverters produce a sine wave that is congruent with the AC waveform produced by the grid. They allow you to send surplus solar electricity, your system has generated back into the grid. Grid connected inverters have Anti-islanding feature which allows the inverter to realize the sudden change in system frequency, voltage, rate change of frequency, increase in kW beyond normal levels, or a change in kVAR and shut down the inverter. When the inverter shuts down your system is no longer producing electricity for the safety of the people who will be working on the grid to repair it. Grid connected inverters are sub categorized as follows: Central Inverter: These inverters are typically used for large scale projects (usually above 250kW). They are huge, have their own rooms with exhaust, etc. They are  are cheaper than string inverters & requires low maintenance due to lesser terminations on AC side. String Inverter: This is the most commonly used solar inverter for homes and business consumers. They are much lighter and resistant to harsh atmospheric conditions. String inverters are based on modularization, each PV string goes through an inverter, with maximum power tracking peak at the DC terminal, and grid-tied at the AC side. Micro Inverter: Micro-inverters are small sized inverters attached to individual solar panels. They use power point tracking,  which means essentially if […] Read more

How can I check whether my rooftop solar plant is operational?

You can check whether your solar plant is operational or not by following options: The inverter has indication lights which shows the status of operation (One can refer the inverter manual to understand the signals from indication lights)  and via display panel of the inverter or remote monitoring a person can check the generation from the plant. Learn more about how to view instantaneous generation of my solar rooftop plant: http://139.59.61.50/2018/08/10/where-can-i-view-instantaneous-generation-of-my-solar-rooftop-plant/ By reading the value from Solar Meter which records the no. of units generated by your plant. Like this:Like Loading... Read more

What is clipping in inverters?

The DC to AC ratio (also known as the Inverter Load Ratio) is an important parameter when designing a solar project. The key driver here is the “clipping loss”. When the DC power feeding an inverter is more than the inverter’s capacity to, the resulting power is “clipped” and lost. Adding 20% extra panel capacity to your inverter is a wise choice: The main reason to oversize an inverter is to drive it to its full capacity more often. As PV modules do not consistently perform at their nominal output rating. The module output power is affected by the weather, the sun’s position during the day/different seasons, local site conditions and array orientation. In addition, module output power may decrease due to aging, soiling and shade. Oversizing the inverter is typically not a requirement, however an experienced PV system designer may choose to oversize the inverter in order to maximize the power production Secondly, additional loading of inverters offers reduction in overall cost of the system. However, in some countries, the local authorities prohibits inverter oversizing. In this case, one has to always follow the local regulations. [Source: Youtube] [Publisher: SolarQuotes] Like this:Like Loading... Read more

Where should the inverter be placed in grid connected solar power system?

The Inverter used in the PV solar system is either to be mounted on the wall or placed on the rooftop depending upon the site features and space availability. Following points should be considered while placing the inverters: Inverters should be easily accessible Away from direct sunlight In an area with at least ½ foot free space on all sides of it Like this:Like Loading... Read more

What is the loading ratio of inverters?

Loading Ratio or DC to AC ratio of an inverter is the ratio of Rated Array Power (DC kWp) to Rated Inverter Output (AC VA). This can be expressed as a percentage value. For example, if array output of 55kWp DC were connected to a 50kW inverter, the Loading Ratio would be: (55kWp / 50kW) x 100= 110%. One can find the Rated Array Power (DC kWp) & Rated Inverter Output (AC VA) of an inverter on the datasheet provided by the inverter manufacturer. Like this:Like Loading... Read more

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