What is the difference between AC & DC Coupling? (AUS)

𝗪𝐡𝐞𝐧 𝐦𝐢𝐠𝐡𝐭 𝐲𝐨𝐮 𝐰𝐚𝐧𝐭 𝐭𝐨 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭 𝐚𝐧 𝐀𝐂 𝐨𝐫 𝐃𝐂 𝐂𝐨𝐮𝐩𝐥𝐢𝐧𝐠 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧?

Sebastien Ng & Patrick Pragasam from our sales team help you explain to your customers 𝐰𝐡𝐚𝐭 𝐭𝐡𝐞 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞𝐬 𝐚𝐫𝐞 𝐛𝐞𝐭𝐰𝐞𝐞𝐧 𝐀𝐂 & 𝐃𝐂 𝐜𝐨𝐮𝐩𝐥𝐢𝐧𝐠 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 by clearing up common misconceptions and we also showcase some of the best use cases to help you design systems for your valuable customers

Are there are any other topics you'd like us to cover? Please let us know in the comments
___

For more Fronius updates and insightful video content please follow us on our social media channels!
___
0:00 – Introduction
0:16 – How does a Solar System work?
1:24 – DC Coupled Solution
2:20 – AC Coupled Solution
3:56 – Benefits of a DC Coupled Solution
6:44 – Benefits of an AC Coupled Solution
7:39 – Conclusion – Like, Comment & Subscribe for more!

[aatirehrarsiddiqui]

By far the best explanation on the subject.

[samykumar]

Very clear explanation. Thank You Fronious team

[Electronzap]

Good info. That'd be cool if there was a unit that fed AC to the grid while also feeding DC to the battery. Maybe split the power 50/50.

[andrewfernandez]

Your AC Coupled you explained is actually a Grid Parallel solution. Your DC COupled solution is just an inverter charger.

AC Coupled is when your string inverter is on the ouitput of the inverter charger (not like you showed).

A DC Coupled solution is when you have your solar panels connected directed to your batteries using a MPPT or PWM charger.

Your sizing is incorrectly explained also. Yes, you can have 150% of solar to your inverter nominal rating but you will only ever provide its nominal power at most. That is, despite having 7, 5kW of solar panels on a 5kW inverter, you will only ever get 5kW max out of it.

Fronius is a great brand but I'm dissapointed with the incongruencies in this video.

[thulanidngubane]

I wish my technician can watch this brilliant presentation....

[davidh]

Great clear simple explanation!!! Thx!!

[tariqusman]

Please tell us. Is it possible that without batteries and without grid, the inverter can supply the AC load? If possble how the inverter will tell us to manage loads according to the power delivered by the Inverter?

[cbflazaro]

Can you charge a DC coupled battery from grid ?

[bootangy]

with ac coupled mictoinverters whats best ups inverter?

[jameshind]

Dc coupled your are limited by the hybrid inverter size. So at night time if your battery lets say 19.2kwh of storage which can supply 7kwh and your hybrid inverter is 5kwh your Max power to the home from the battery will be 5kwh. This is important on single phase especially if you are a high power user at night. Ac coupled works differently as your not limited by the hybrid inverter as it doesn't affect the power draw as the power comes directly from the battery. So if you had 2 x tesla powerwall 2 and each provide 5kwh of power you would have 10kwh of power available. On Dc coupled with a single phase house it doesn't make any difference how many batteries you have and the total kWh available as you will always be limited to 5kwh of the hybrid inverter. Another advantage of Ac coupled is that you are not affected as much when your solar system breaks down as Ac coupled batteries can still charge from the grid even when the solar isn't working which is good if your on a time of day tarrif. Dc coupled require the hybrid inverter to be working to charge the battery from the grid.

[larryk]

This explanation does not address the use of micro inverters as an ac coupled solution

[SanaagSomaliland]

Can you have both DC coupled and AC coupled in the same system?

[torbenjacob]

I find it very difficult to actually buy a Fronius inverter. They seam to be out of stock everywhere I look. When do you expect to be able to keep up with demand? I live in Denmark.

[michaelswart]

I have a 5 KW system using Enphase IQ7+ micro inverters and enlighten for monitoring - Unfortunately the Enphase battery solution is not available in my country, so i was wondering if you can recommend me a few ac coupled battery solutions that i can use with my system. I quite like the Huawei Luna modular battery system, but not sure if it will work with my set up.

Would appreciate any advise you can give.

[salarhadi]

Please can you explain that dc coupling is more stable than ac coupling in output waveform of inverter.

[willo]

4:04
i'm interested in DC coupled system where an inverter takes in battery directly.
in this case, does it mean, PV panels with 6.6kW DC out to a 5kW-inverter, generating 5kW AC to the grid, while the remaining 1.6kW DC from PV can be stored in the battery?

[myherdem]

Do we need charge controller for DC coupling systems?

[dansas]

Are the two methods of coupling batteries only for offgrid systems or they can be applied to ongrid systems as well? How can be configured an ongrid system when using energy stored in batteries not to inject in the grid, for example during night?

[sergesicard]

I don't have a grid but I have 2 grid tied inverter of 6kw and a hybrid inverter of 6 kw
Can I feed the grid tied inverter with the hybrid to simulate the grid and have a total of 18 kw

[naeemjanamin]

Sorry but I could not help but think that it was an oversimplified presentation. There was NO mention of net-metering and the effects of power outage on either DC or AC coupled systems. But one of the biggest issues was what happens when a power outage takes place in the day time? Why can't the solar panels provide energy to the household with the use of an auto transfer switch that cuts power from being fed back to the grid? The present hybrid solutions rely on the battery bank during outage, which means that the power generated by the panels is NOT BEING USED? I request the Fronius Team to give a complete solution with effects of outage during day time. Looking forward to a fruitful discussion.