A 3 phase solar inverter is an essential device that converts the Direct Current (DC) electricity generated by solar panels into Alternate Current (AC), effectively distributing it across a three phase power system. This technology is particularly popular in commercial settings, where high power outputs are necessary.
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Understanding the Cost of 3 Phase Solar Inverters
One important aspect to consider is that 3 phase inverters typically cost $300 to $500 more than a comparable single phase solar inverter. For those looking to make an informed decision, we provide a curated list of the best 3 phase inverters at the end of this article.
Do You Need a 3 Phase Solar Inverter?
The necessity of a 3 phase solar inverter largely depends on your power supply situation. If you have access to 3 phase power, it’s generally recommended to employ a 3 phase inverter over a single phase inverter, as this helps mitigate potential voltage rise issues. However, if your system operates on a single phase, using a 3 phase inverter isn't necessary.
Here are two important considerations:
- Using a single phase inverter won’t lead to financial loss.
- A 3 phase inverter minimizes the risk of voltage rise.
Net Imports and Exports with Single Phase Inverters
It's a common misconception that using a single phase inverter means you'll incur losses when tied to a 3 phase power supply. In fact, if you consume electricity across different phases while exporting solar energy through a single phase inverter, your meter calculates the total imports and exports. This operation is facilitated by a 3 phase digital meter, commonly known as the Atlas EDMI polyphase meter.
How Does This Work?
- Phase 1: Solar energy is redirected to the grid.
- Phase 2: A large air-conditioner is in operation.
- Phase 3: An instantaneous electric hot water system is utilized.
In this scenario, using a large air conditioner and an instantaneous electric hot water system simultaneously on different phases—while exporting solar energy via a single phase inverter—demonstrates efficient energy use.
Typically, you might see a feed-in tariff of about 10 cents for surplus solar energy, contrasted with rising costs between 18 to 40 cents for buying electricity from the grid. Therefore, it’s important to optimize your net balance.
If you're looking for insight on three phase battery storage, don’t hesitate to reach out to us!
Lucky for you, the 3 phase meter zeroes out your total imports and exports. This means that you can effectively use a single phase inverter while self-consuming electricity generated from your solar panels, even if it’s utilized on a different phase.
Understanding Voltage Rise
Voltage rise occurs when there is a difference between the grid voltage and the voltage produced by your inverter. In typical scenarios in Australia, grid voltage varies between 216 to 253V, with an approximate average of 230V. Most inverters will output slightly higher voltage, usually around 235V, ensuring sufficient energy is sent back to the grid.
The Risks of Voltage Rise
When numerous solar systems are in operation, grid voltage may peak during optimal solar production times. If the grid voltage rises excessively, the inverter may disconnect to safeguard itself, resulting in system shutdowns.
Mitigating Voltage Rise Risks with a 3 Phase Inverter
If you work with 3 phase power, employing a 3 phase solar inverter can help manage voltage rise effectively by distributing energy back to the grid through three lines rather than just one. Hence, if you have access to 3 phase, investing a bit more in a 3 phase inverter is often wise.
If you don’t have 3 phase power availability, increasing the cable size may help reduce resistance and lower the overall voltage.
Top 3 Phase Solar Inverters
There are numerous manufacturers that produce effective 3 phase inverters. The list includes brands synonymous with quality and reliability:
- Fronius Symo: 3kW to 20kW
- SMA Sunny TriPower
- SolarEdge Three Phase inverter
- SunGrow 3 Phase Hybrid inverter
Enphase micro inverters are also an option for those needing a flexible solution with a 3 phase supply, despite not being specifically designed for that configuration.
Exploring Hybrid Solar Inverters
The SunGrow 3 Phase Hybrid inverter is recognized as an exceptional choice amongst hybrid options in Australia. If you’ve got specific needs regarding OEM hybrid solar inverter for home supplier, our knowledgeable sales team is more than happy to assist you in identifying the options that will best meet your requirements.
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