Solar Power Panels – How Power Export Works

Have you been thinking about installing a solar PV system? If yes, then you’re likely asking the same question as most interested folks – “how does solar power export work?” How can your solar power system send unused energy into the grid? More importantly, how can you benefit from it? To know the answer to these questions, we will need to understand how a photovoltaic solar system works.

What is a Photovoltaic System?

A solar photovoltaic system works in a straightforward manner. Sunlight that hits the PV panels gets converted into direct current (DC) electricity. Then, the energy generated flows into the inverter, which transforms the energy into AC, a more usable form of energy for appliances and electronics.

Notably, most of the PV solar systems sold in the market today connect to the national power grid. This allows you to send excess energy or draw energy from the grid, depending on how much power the system generates. Essentially, when you send surplus energy to the grid, you can earn rebates in each monthly electricity bill, helping you offset the upfront costs of the PV panel systems.

The Efficiency of your System’s Power Export Relies on the Inverter

But how exactly do your PV panels send power to the national grid? The answer lies in the design of the inverter, especially its component we refer to as the current transformer. Apart from helping you connect to the grid, the inverter constantly monitors energy fluctuation through the current transformer. This way, you get to ensure a smooth flow of energy to and from your system.

It also helps you limit the amount of energy sent to the grid. So, if you set the export limit settings to 3.5kW for a 5 kW PV panel system, this means that no more than 3.5kW of surplus solar energy will get exported to the grid. Additionally, this means that the inverter will only kick in and begin sending excess energy if your household consumes less than 1.5 kWh per day.

Notably, if a problem occurs in the grid, the inverter tends to shut off automatically, helping reduce the risk of electrocution, especially among line workers who need to check and maintain supply lines. Then, when it all goes back to normal, the inverter switches on again, reconnecting you to the system.

What to Remember When Shopping for a PV Panel

Every year, we see more and more NZ households opting for cleaner and carbon-neutral sources of electricity such as solar power. If you’re looking to tread the same path, then we can certainly help you at ESolar. We have a variety of solar panel systems to choose from, depending on your property’s energy requirements.

When you’re trying to choose between the available options, you should remember to look into the following factors:

  • The system’s efficiency and compare it to industry standards (around 16 to 18 percent).
  • The quality and durability of the components such as the panels, inverter, and battery storage units.
  • The design and size of the system, especially if you have limited space in your property.
  • The type of solar cells used (Monocrystalline, Polycrystalline, and Amorphous.
  • The costs involved in installing a specific type of solar power system.

Your Best Source of Solar Power Systems

Are you hoping to switch to a cleaner source of energy? Would you like to know more about photovoltaic panels? Feel free to check out our guide to PV panels here at ESolar. You may also reach out to our team for additional queries or other concerns. We would love to be your partner in seeking clean and sustainable energy sources in NZ. Give us a call at 0508 449 274 or contact us here.

Different Forms of Solar Power For Kiwis

Over the years, experts have established different technologies that help convert sun rays into energy. Photovoltaic technology helps convert sunlight into electricity, while solar thermal heat helps in harnessing the heat. These technologies are standard in New Zealand and across the globe.

Solar energy is widely available to meet your needs. However, the main challenge involves collecting a share of radiant heat and converting it into electricity. Here are the various types of solar power that serve as a viable solution.

1. Photovoltaic Solar power (PV solar)


PV solar power technology helps in converting sunlight directly to electricity. This process uses panels made of semiconductor cells that get the job done. These solar power plants cover large areas; therefore, they can be fed into power grids.

This solar power works by following the electric current occurs in cases where the electrons are displayed principle. Moreover, the photons exited the other atoms of the specific semiconductor element. This panel is made of several cells converting light into current.

Photovoltaic solar powers are reliable and valid for large and small areas.

2. Thermal solar power

Thermal solar power generation systems collect and concentrate sunlight to generate electricity. They are designed. It increases the high temperatures needed for making power. These power systems have reflectors to capture sunlight and focus it on the receiver.

Thermal solar power has tracking systems that allow them to concentrate on focusing the sunlight on the receiver. The feature is essential since the tracker helps reflect the sum to the receiver even as the sun changes positions. They also have advanced technology that increases solar heating.

This solar power has a parabolic trough collector technology important in increasing the rate at which the sunlight is converted into electricity. Moreover, they are designed to last for a long time giving you long term service. After purchase, you will live for long time-saving money that would be used to pay bills.

3. Off grid solar power and ongrid solar power

The ongrid solar power system uses standard inverters connected to the public electricity grid. The excess solar power heat is transferred to the electricity grid. In case your area has a blackout, you cannot generate electricity for safety reasons.

When the solar system stops operating, you will start consuming electricity directly from the public grid.

The off-grid system, on the other hand, is not connected to any electricity grid. For this reason, it requires a battery to aid with the storage. This system is becoming outdated with time; however, it plays an essential role in ensuring cells have enough energy even during winter.

The off-grid solar panels cost $2.96 per watt while the on the grid is much cheaper.

Five hours of light in NZ are enough to charge the batteries or ensure that the on grid solar power operates effectively. These solar panels play an important role in saving thousands, which could otherwise be used for electricity bills.

Bottom Line

Sunlight can easily be converted into electricity using solar panels. They are designed in different ways to help meet your needs. These NZ solar power systems offer potential energy savings for you and are available at low prices.