Inverter for on grid solar

Types of Inverters for On-grid Solar

When it comes to selecting a solar inverter for an on-grid system, one must consider the compatibility, cost, and features of the different options available. In solar energy systems, inverters play the role of converting the direct current (DC) generated by the solar panels into alternating current (AC), which can then be fed into the local energy grid or used on the premises.

There are three main types of solar inverters.

String inverters

Are the most commonly used inverters in the industry. They work by having several solar panels connected to one inverter, also referred to as a string. Therefore, in a case where one panel has shading, the rest of the panels will still be able to work.

A string inverter is a suitable choice for homes that have a south-facing roof with no shading throughout the day. If the solar installation is going to be in a commercial or industrial building with a large, open roof space, a string inverter for an on-grid solar system will be the most cost-effective solution.

Microinverters

Are small inverters that are installed on each solar panel individually. Their main advantage is that they optimize the energy production of each panel separately. Even if one panel is shaded or dirtied, the other panels will still produce maximum energy.

Micro inverters are ideal for residential systems where shading occurs on some panels but not on others. They also come in handy when the client intends to expand the solar installation in the future.

Hybrid inverters

Are inverters that can work both with and without a battery. They allow an on-grid inverter system to store energy in a battery for later use. Hybrid inverters are suitable for those who want battery backup during power outages or who live in areas with high electricity prices.

Industrial and Commercial Applications of Inverters for On-grid Solar

Inverters for on-grid solar play a critical role in commercial and industrial operations, maximizing energy production, lowering costs, and promoting sustainability.

Lowering electricity costs

Inverters enable C/I businesses to use solar energy for their electricity needs. This reduces the amount of electricity purchased from the grid, leading to significant cost savings over time. In areas with high electricity prices, the financial savings can be very significant.

Maximizing energy production

On-grid solar systems can capture and convert all available sunlight, even when conditions are less than ideal, with the right inverter. Whether it's a cloudy day or early in the morning or late in the evening, advanced inverter technology ensures that energy production is maximized.

Grid compliance

In high-power commercial and industrial environments, maintaining grid compliance is critical. Inverters help achieve this by ensuring that the energy fed back to the grid is of the same voltage and frequency as the grid. This maintains stability and reliability.

Scalability and flexibility

Most inverters come with scalable designs that allow for the easy expansion of on grid inverter systems as a business grows. New solar panels and inverters can be added without a complete system overhaul. This makes it a flexible long-term solution for dynamic commercial and industrial environments.

Product Specifications and Features of Inverters for On-grid Solar

Technical specifications/key features

• Maximum power point tracking (MPPT)

  MPPT is a feature found in most modern solar inverters that help maximize energy harvest. It works by constantly adjusting the operating point of the solar panels to ensure they are producing as much energy as possible, no matter the weather conditions or time of day. It's like having a smart system that optimally manages the energy generation throughout the day to get the best results.

• Grid-tie capability

  This means the inverter can connect and work with the existing power grid. It allows solar energy systems to feed extra generated electricity back into the grid, which helps power homes or businesses without needing a battery for energy storage.

• High efficiency

  With an efficiency rating of 97% or more, this inverter ensures nearly all sunlight converted into DC electricity is transformed into usable AC electricity. This means less energy is wasted, resulting in more electricity for home or business use.

• Automatic grid detection

  This feature allows the inverter to automatically detect and adjust to the existing power grid's voltage and frequency. It makes installation simple and ensures the inverter operates smoothly without manual settings or adjustments.

• Remote monitoring

  Many modern inverters are equipped with remote monitoring capabilities. This allows users to easily check their solar system's performance from a smartphone or computer. It means no need to go outside or check physical displays to see how well the solar power system is generating electricity.

How to install the product

• Safety first

  Ensure all safety precautions are followed before starting the installation. Turn off any electrical power in the area, use safety gloves and glasses, and follow all safety guidelines from the inverter manufacturer.

• Select an installation location

  Choose a suitable spot for the inverter installation. It should have easy access to the solar panel array on the roof and connection points for both the AC home's electrical system and the DC solar panels.

• Mount the inverter

  Securely attach the inverter to a wall or mounting bracket using appropriate tools. Ensure a steady and safe mounting position for the inverter to work correctly without any hindrance.

• Connect the solar panels

  Carefully wire the solar panels to the inverter as per the manufacturer's instructions. Be sure the positive and negative wires are correctly connected to the right terminals to ensure proper functionality.

• Connect to the electrical system

  Link the inverter to the home's electrical system by connecting the AC wires to the inverter. It's important to follow the proper procedures so that there is no danger to the user's health or home.

• Turn on the inverter and check

  Flip the power switch on the inverter to start it up. Confirm that the inverter is running properly by looking at the display panel for system status and checking that all settings are correct before starting to use the device.

Maintenance and repair

• Regular inspection

  To keep the inverter working its best, regularly check it for any damage, like loose wires or signs of overheating. You can also look at the display to see if there are any error messages or performance issues that need to be addressed.

• Cleaning

  Dust can build up on inverters and their surroundings, which may cause them to not work as efficiently. Lightly dust the inverter and area around it every few months and use a damp cloth to wipe it clean.

• Monitor the performance

  It's important to keep an eye on how well the inverter is doing its job. By checking the energy output regularly, one can spot any dips in production that may indicate a problem with the inverter or solar panel system. Most inverters come with mobile apps or online tools that make performance tracking very simple.

• Check the firmware

  Many modern inverters have software that needs to be updated every now and then. This helps maintain the inverter's efficiency and security. Check the manufacturer's website for any new updates and follow their instructions to install them.

• Servicing schedule

  Some components may require replacement or deeper maintenance after a while. Refer to the manufacturer's guide to know when to take care of these things. For any big repairs or questions about what to do next, reach out to certified technicians or the inverter company for help.

Quality and Safety Considerations of Inverters for On-grid Solar

Solar inverters play a critical role in transforming and regulating solar energy, so quality and safety considerations are vital. These ensure reliability, longevity, and risk prevention in solar energy systems.

Electrical safety

• The materials of solar panel inverters must withstand high voltages, such as the electric current from the solar panels. This helps prevent dangerous situations like short circuits, electrocution, or fire.
• They must also be resistant to electrical surges. They are frequent during storms. Their design must also ensure that any electric current does not harm people or damage other devices connected to the building's power network.

Performance quality

Inverters need to operate very well when conditions are not very favorable. Features like MPPT help them to produce energy even in low-light or cloudy situations. When storms are common, high-quality inverters are durable enough to withstand harsh weather, like strong winds or heavy rain.

International quality standards

• Quality solar inverters are certificated by international standards like IEC and UL. These regulations have specific tests for solar inverters to make sure they are safe and work well globally.
• Local and regional standards also exist, like CE in Europe and CEC in Australia. These rules are based on concerns for that environment and how residents use electricity.

Overheating prevention

Other cooling systems also help them avoid overheating when they operate in hot weather or for many hours continuously. This ensures they do not fail or cause safety problems when they get hot from working hard.

Collision avoidance

Those made of robust materials ensure that the inverter can avoid internal component collisions. This is especially when it has to deal with external shocks and vibrations, like during transportation and installation.

Q&A

Q1. What is an inverter for an on-grid solar system?

A1. An inverter for an on-grid solar system is a device that converts the direct current (DC) electricity generated by solar panels into alternating current (AC) electricity. The AC electricity can then be used to power the client's home or business. Any excess electricity generated can be fed back into the electrical grid, allowing the client to receive credit on their utility bill.

Q2. How does an inverter for an on-grid solar system work with battery backups?

A2. The inverter's role in solar systems with batteries is to first convert the DC electricity from the batteries into AC electricity for use in the client's space. It also allows the batteries to charge by converting AC electricity from the grid into DC electricity to store in the batteries.

Q3. What is the difference between a string inverter and a microinverter?

A3. A string inverter connects multiple solar panels in a series (or "string") and acts as a single inverter for the group. This type of inverter is best for areas with uniform sunlight exposure. A microinverter is a smaller inverter that is attached to each individual solar panel. This allows each panel to operate independently, which can be very useful in situations where some panels might be shaded, or there are varying levels of sunlight on different panels. This ensures that each panel generates the maximum amount of electricity possible, regardless of the conditions.

Q4. What maintenance does an inverter for an on-grid solar system require?

A4. The maintenance mainly consists of regular inspections to check for any issues, such as error messages on the display or signs of damage. Keeping the inverter clean from dust and debris is also important. The client's solar installation performance energy output should be monitored. Firmware updates may be needed for inverters with software. For larger repairs or any major issues, certified technicians should be contacted.