0
www.cenergymaxpower.com
FAQS ON
SOLAR INVERTERS
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What is an inverter?
A. An inverter is a device which a DC (Direct Curr...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. Why is an inverter so called?
A. The inverter has got its name from a c...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are the two types of inverters?
A. The two main types of inverters...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What is a solar inverter?
A. A solar inverter is a device that converts...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are off-grid solar inverters?
A. Off-grid solar inverters, as thei...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are grid-tied solar inverters?
A. Grid-tied solar inverters, as th...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are hybrid solar inverters?
A. Hybrid solar inverters, as their na...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are the capacities of off-grid solar inverters?
A. Typically, off-...
www.cenergymaxpower.com
FAQs on Solar Inverters
Q. What are the capacities of grid-tied solar inverters?
A. Grid-tied sola...
www.cenergymaxpower.com
FAQs on Solar Inverters
Thank you!
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FAQs on solar inverters

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This document contains FAQs (Frequently Asked Questions) on solar inverters. The reader will get a very good idea about solar inverters, the different types, and where they are used.

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Transcript of "FAQs on solar inverters"

  1. 1. www.cenergymaxpower.com FAQS ON SOLAR INVERTERS
  2. 2. www.cenergymaxpower.com FAQs on Solar Inverters Q. What is an inverter? A. An inverter is a device which a DC (Direct Current) input and produces an AC (Alternating Current) output. More often than not, the DC input is taken from a battery. However it can also be from solar PV modules in the case of solar applications. The AC output is for running household appliances like tubes, fans, air conditioners, refrigerators, TVs, computers, etc. and also for industrial appliances.
  3. 3. www.cenergymaxpower.com FAQs on Solar Inverters Q. Why is an inverter so called? A. The inverter has got its name from a commutator which originally were large rotating electromechanical devices. They combined a synchronous ac motor with a commutator so that the commutator reversed its connections to the ac line exactly twice per cycle resulting in “AC-in DC-out”. However, if one inverted the connections to a converter, one could put DC in and get AC out. Hence an inverter was an “inverted” converter and that is how it got its name.
  4. 4. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are the two types of inverters? A. The two main types of inverters are: pure sine wave inverters and modified sine wave inverters. Pure sine wave inverters, as their name suggests, produce a pure sine wave output which is identical to the power that we get from the grid. Many household appliances like digital clocks, battery chargers, light dimmers, variable speed motors, and audio/visual equipment require a pure sine wave, and therefore it is advisable to power them with pure sine wave inverters. If you do that, it will ensure that all these “sensitive” loads will work properly and last a long time. Modified sine wave inverters, as their name suggests, do not produce a pure sine wave output; their output is a “stepped wave” which is obviously not as smooth as a pure sine wave. They achieve voltage regulation by varying the pulse width according to the battery voltage and the load. The stepped wave output is not good for “sensitive” loads and can damage them. It also causes a buzzing sound in stereos and ceiling fans. However, modified sine wave inverters should not be underestimated; they are highly capable and by narrowing the waveform they save energy when running only small loads, as happens during most of the day in a typical home. Modified sine wave inverters were successful at one point, and still are to a large extent. However, more and more companies are not coming out with only pure sine wave inverters as the incremental cost to produce pure sine wave inverters reduces with advances in technology.
  5. 5. www.cenergymaxpower.com FAQs on Solar Inverters Q. What is a solar inverter? A. A solar inverter is a device that converts the (constantly varying) DC output of a solar PV module – the input to the solar inverter – into AC. A solar inverter is a necessary part of a solar PV installation or a solar PV power plant. Q. What are the types of solar inverters? A. There are three main types of solar inverters: off-grid solar inverters, grid-tied solar inverters, and hybrid solar inverters.
  6. 6. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are off-grid solar inverters? A. Off-grid solar inverters, as their name suggests, work “off the grid”, which means that they are not connected to the grid. Off-grid solar inverters are also called standalone solar inverters. Q. Where are off-grid solar inverters used? Off-grid solar inverters are used in places where the grid is either unavailable or is very unreliable. Examples of good applications of off-grid solar inverters are farmhouses, telecom towers at remote locations, or street lights at remote locations. One other very important application is local, smart, mini-grids in rural areas for the purpose of electrification. There are many villages in rural India where the grid is not available. Such villages can be electrified using self-contained mini-grids. Off-grid solar inverters play a very important part in this application.
  7. 7. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are grid-tied solar inverters? A. Grid-tied solar inverters, as their name suggests, are those that are connected or “tied” to the grid. Q. Where are grid-tied solar inverters used? A. Grid-tied solar inverters are used in places where the grid is fairly stable. So big cities and urban areas is where grid-tied solar inverters will be used. In the case of residential properties, most of the electricity will be fed into the grid since residential properties do not consume a whole lot of energy during the sunshine hours. In the case of commercial properties, a lot of electricity is required during the day for powering lights, fans, A/Cs, computers, etc. Therefore, most of the generated electricity will be used for self-consumption, and only very little will be fed into the grid, if at all. Utility-scale solar PV power plants are special in the sense that they could be (and in all probability are) located in remote areas but feed electricity into the grid. A transmission line is constructed from the solar PV power plant to the nearest sub-station to feed electricity into the grid.
  8. 8. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are hybrid solar inverters? A. Hybrid solar inverters, as their name suggests, are those that can work in grid- tied mode when the grid is available, and in off-grid mode when the grid is unavailable. Q. Where are hybrid solar inverters used? A. Hybrid solar inverters are used in places where the grid is unreliable. Many Tier-II and Tier-III cities in India have an unreliable grid, and that is where hybrid solar inverters will be very useful.
  9. 9. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are the capacities of off-grid solar inverters? A. Typically, off-grid solar inverters in come small capacities, say 1 kW to 20 kW. The main reason for this is that solar PV is still quite expensive. So nobody goes for big off-grid solar PV systems. When the requirement is high, people usually rely on the grid for electricity.
  10. 10. www.cenergymaxpower.com FAQs on Solar Inverters Q. What are the capacities of grid-tied solar inverters? A. Grid-tied solar inverters come in all capacities, from 1 kW all the way up to 1 MW and even more. The smaller capacity inverters are called string inverters, while the larger capacity inverters are called central inverters. String inverters in small rooftop installations, while central inverters are used in large rooftop installations and in utility- scale solar PV power plants.
  11. 11. www.cenergymaxpower.com FAQs on Solar Inverters Thank you!
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