By installing a Selectronic Certified inverter as part of your grid-tie solar system you have the reliability and performance of a European inverter with the ability to upgrade at a later time to a fully functional Solar Hybrid or Grid Support power system. Contact online >>
By installing a Selectronic Certified inverter as part of your grid-tie solar system you have the reliability and performance of a European inverter with the ability to upgrade at a later time to a fully functional Solar Hybrid or Grid Support power system.
System sizes range from 3kW to 20kW single phase (with up to 30kW of PV solar), 6kW to 40kW split phase (with up to 60kW of PV solar) and 9kW to 60kW three phase (with up to 90kW of PV solar).
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By Finn Peacock, Chartered Electrical Engineer, Fact Checked By Ronald Brakels
Most solar systems installed today are connected to the national electricity grid. And for good reason. The electricity grid can be thought of as an enormous and very cheap battery. When your solar power system generates more than your home can use, the grid will take your excess electricity. When you need more electricity than your solar panels can generate, the grid will happily top you up with all the electricity you need.
Grid connected solar systems need grid tie inverters. These are special solar inverters that will synchronise with the electricity grid. They produce grid compatible 240V AC (sinewave) electricity from the DC voltage that your panels produce. The electricity from a grid tie inverter is indistinguishable from the grid’s electricity. In fact, often it’s actually better quality power than the grid’s!
Here’s what a grid-tie inverter looks like in case you haven’t seen one before:
A grid tie inverter produces sinewave AC electricity that matches the voltage and frequency of the grid exactly. Did you know that the grid’s voltage and frequency varies considerably from day to day? This means that your grid tie inverter actually has to monitor the actual grid frequency and voltage and then adjust its output to match the grid’s imperfect waveform at any given time.
This allows the inverter to feed electricity back into the grid, which exactly matches the electricity being delivered by the utilities.
Most grid tie inverters will shut down if the grid goes down, and they will also shut down if the grid’s frequency or voltage gets too high or too low, such that they are outside of the inverter’s operating limits.
This is a lot more likely to happen if you live near the end of a transmission line or near a factory that draws lots of electricity and hasn’t invested in good power factor correction equipment.
If this does happen, the inverter may, depending on the model, either switch back on automatically when the power quality improves, or if it is a really cheap and nasty inverter, require a manual restart.
Every grid tied inverter you can buy will have an Ingress Protection (IP) rating.
This number tells you how well sealed the inverter is and where it can be installed:
IP21 – Indoor use onlyIP42 – can be installed outside but must be covered and enclosed.IP65 – can be installed outside, uncovered
The best place to put your inverter is in a cool garage. The worst place to install a solar inverter is in direct sunlight, as high temperatures will reduce the lifespan of your inverter considerably and also reduce its efficiency.
Ideally your grid tied inverter will be as close as possible to the meter box, but your top priority should always be to have it in a cool place. If that means that your inverter is a long way from the meter then so be it. You just need to ensure that your installer uses extra thick cable to connect the inverter to the grid. The thicker the cable, the lower the resistance, and the lower the power losses. If your grid tie inverter is more than a few meters away from your electricity meter, then insist on a cable size that reduces power losses in the AC cable to less than 1%. If you want to know more about this issue I’ve written a blog post where I talk about wire thicknesses and inverters in a lot more detail.
Rooftop PV, solar farms or add energy storage with an SP PRO bi-directional inverter and you will have a system that is flexible enough to tackle On Grid or true Off Grid.
City to the country, and backed by one of the world’s longest-established Inverter companies.
BR0014_02 SelectSun Data Sheet October 2018 (PDF 1.23 MB)
BR0016_01 SelectSun Accessories October 2018 (PDF 1.42 MB)
Xantrex Technology develops and manufactures high quality solar inverters forcommercial and home grid connect solar power markets. Xantrex inverters offer excellentthermal performance, high efficiency and outstandingenergy harvest in a small modular design
Established in 1983, Xantrex Technology employs around 300 staff and has been arecipient of the Frost & Sullivan Award for Growth Strategy Leadership in World Inverter Market.
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