Solar inverters are an important tool in generating electricity. When putting on a kettle to make a cup of tea, it is uncommon for people to think any further than their plug socket as to how the electricity is generated to enable the kettle to boil. By generating electricity from the free and unlimited power supply available from the Sun, solar inverters create a simple arrangement that allows people to operate commercial, household appliances with the use of solar power.
This guide will talk users through what solar inverters are, provide information on different specifications of different solar inventers, and inform users how to purchase the most suitable type from eBay at an affordable price.
How Solar Inventers Work
This section of the guide will cover all the technicalities into how solar inverters work. It will also provide explanations of some of the important components, to ensure clarity for buyers.
A solar inverter converts variable direct current, also referred to as DC output of a photovoltaic, also referred to as PV solar panel, into something called a utility frequency alternating current, also referred to as AC. This AC can then be used by a local, off-grid electrical network, or fed into a commercial electrical grid. Without a solar inverter, the use of ordinary commercial appliances would be impossible in the photovoltaic system. They have special functions for the use of photovoltaic arrays.
· Direct Current (DC) – A direct current is a flow of electric charge that flows constantly in one specific direction. Direct currents are produced by sources such as batteries and thermocouples as well as solar cells.
· Photovoltaic (PV) – This is simply the name for the method of generating electrical power by converting solar radiation into direct current electricity.
· Utility Frequency Alternating Current (AC) – The utility frequency, also known sometimes as both line frequency and mains frequency, is the frequency of the oscillations of alternating current in an electric power grid transmitted from a power plant to the end user; the end user being anyone using their commercial appliances.
· Off-grid – A stand alone network that is not connected to the main or national transmission grid in electricity.
Types of Solar Inverters
There are a small number of different types of solar inverters, each of which makes the transfer of solar energy into electricity differently. This section will specify the types of solar inverters and the way in which each of them work individually:
Grid Tied Solar Inverters
A Grid tied solar inverter is designed to disconnect from the grid if the utility grid goes down for some reason. This requirement ensures that any energy being produced in the event of a blackout will be shut down. This avoids any potential harm to the line workers fixing the power grid. Some grid tied solar inverters use low-frequency transformers; others use high-frequency transformers. Some use no transformer at all.
These convert direct current from one solar panel to alternating current. Several micro-inverters are combined and their electric power is sent to consuming devices. When faults occur in micro-inverters, they are able to be identified to one point. This makes the isolation of a fault easier. They are small in size and power rating, and produce one-to-one control over a single panel, allowing it to isolate and tune the pane’s output.
A charge controller may be used to power the direct current equipment with solar panels. They provide a regulated direct current output and store any excess energy in a battery. Additionally, it monitors that battery to prevent under or over charging, preventing the reduction of life span. Charge controllers can be sold as standalone devices, or be integrated into a circuit.
Solar Pumping Inverters
With these, direct current voltage from the solar array is converted into alternate current voltage to drive submersible pumps without the need for any other energy storage devices. Solar pumping inverters regulate output frequency, controlling the pump’s speed, saving the motor from damage.
Other Important Factors of Solar Inventers
This section will cover additional important factors of solar inventers. These factors address safety, and some specific features of solar inventers:
· Classification – Solar inventers tend to be set out in three broad types, those being standalone inverters, grid-tie inverters, and battery back-up inverters, all of which have already been discussed in detail earlier in this guide.
· Maximum Power Point Tracking – Solar inventers use maximum power point tracking, also referred to as MPPT to get the maximum power from the photovoltaic array possible. The system samples the output of cells and determines resistance. This allows the maximum power to be obtained during any environmental condition. There are three main types of maximum power point tracking, they are incremental conductance, constant voltage and perturb-and-observe.
· Anti-Islanding Protection – The requirement of grid-tie inverters turning off in the event of failure prevents inverters from feeding power into small sections of grids called “islands”. In addition to preventing risk to line workers, it contains power output to drift from tolerances required by customer equipment connected within an island.
· Failure – There are a number of reasons as to why a solar inverter may fail or have a short life span. Some of these reasons are as follows;
o Capacitor Failure – Including voltage stress, current stress, improper charge and discharge rates, and vibrations.
o Inverter Bridge Failure – Including thermal shock, thermal overload and usage beyond the operating limit.
o Electro-Mechanical Wear – Including component stress, contamination and extreme temperature conditions.
Buying Solar Inventers on eBay
The section will cover the way the most suitable solar inventers can be found and purchased using eBay.
· When buying solar inventers on eBay, consider which type of solar inverter is required or desired. Think about potential safety issues and special features. Bring those considerations to eBay and start the search.
· In the instance of solar inverters, start by selecting the Electronics category. From the second list of categories, select Solar. Then finally, Chargers, Inverters. Within this category will be a list of all relevant items available.
· Utilize additional filters such as condition, item location and format. Users are able to choose whether or not they would like brand new or used solar inverters, whether solar inverters are being sold locally or worldwide, and whether they would like to bid in an auction, or buy a solar inverter instantly, at a fixed cost.
· Feel free to communicate with a seller. If unsure about a solar inventer of interest, or require additional information, use the option to directly message sellers.
· Be safe. Before committing to a purchase, be confident about a seller. Check their feedback statistics and read any negative comments left by other buyers. When confident with a solar inventor and its seller, use PayPal for a quick and secure financial transaction.
Solar Inventers are a complicated but extremely sufficient device. It is important to be knowledgeable of how they work, what different types there are, and issues surrounding safety before searching for the most suitable device. Use the world of information that the internet provides at a person’s disposal, research necessary considerations, such as type, for example, grid tie.
Using eBay’s simple and clear search categories and filters, whittling down to a solar inventor that meets all the desired requirements will not be a problem. When ready to buy from a reliable seller, use PayPal to make the payment. On receipt, leave feedback that honestly reflects the transaction. Be familiar with eBay’s terms and conditions.