Aurora wind grid inveter on off grid system

[Germain tuny]

Hello everybody !

Anyone have test a grid tie inverter on an off grid installation ?

I have an off grid 48v solar pannel installation with a wind turbine controler which charge battery too.

Recently i bought an Aurora PVI-6000 wind, to avoid lost wind energy when battery are full. because it stop my wind turbine when battery are full.

So i would want to use the Autora on my system, to add energy, problem is when i plug on my installation, inverter stop directly when he connect on the off grid.

Somes person say than the voltage will be too high without enought load by the wind inverter and all inverter (solar and wind) stop by security.

Sorry for my inverter i can't enter in service mode to try somes setting on voltage, the seller not give me the service code and to contact power one or abb is not very easy now... i try to plug on grid tie and have same problem, i wonder if the setting are correct inside. Error is same on grid tie and off grid, grid fail.

Thanks !

[Glen Johnson]

I will assume the " aurora " is a grid tie wind inverter... in that case it MUST have a clean sine wave to sync to, within the parameters set in your country.. usually between 215 - 265 volts if single phase..

if you have a reasonably clean wave coming from your " off-grid " inverter and it is transformer based, you can AC couple it ... whatever power above the load will flow back to your batteries. If it is a " high frequency " 2 stage inverter, it will not work and may cause damage...

[Rob Beckers]

Germain, what country is the Aurora inverter made for (the type code should say that, the last two letters are usually a country code)? What country are you in? What's the exact error code (should be "W..." or "E..." on the display with a description)?

I can give you the factory access code, but unless you know what you're doing odds are you'll just do more damage.

As Glen mentioned, for off-grid use you can only make this work in an AC-coupling setup (feeding back the off-grid battery based inverter on its AC side). That only works for certain inverters, the low-frequency ones that have a big and very heavy transformer and a single H-bridge inside. With those inverters, while it may work, you will not get charge control. As long as the grid-tie inverter is supplying power it will keep charging batteries until something breaks. The other thing to keep in mind is that you shouldn't exceed about 80% of off-grid inverter rating in what you try to feed back via AC-coupling.

The Aurora inverters have a Voltage window, exceeding it on the low or high end will cause the inverter to switch off with an error. It's possible to change the Voltage window via the factory menus, but usually going over- or under-Voltage means something else is wrong.

-RoB-

[Glen Johnson]

You can control the charging with a grid tie, here are a couple of methods... ( i hope links ok)

Pwm on gti input,

https://www.anotherpower.com/board/index.php?topic=1270.0 ( use a version of this myself)

Here clockman goes into a few other methods of control..

https://www.fieldlines.com/index.php?topic=150318.msg1054897;topicseen#msg105 4897

Hope this helps..

[Germain tuny]

HEllo,

Thansk for help guys.

Yes it's grid tie inverter.
But i think there is a problem because same plugged on grid, he blows the circuit breaker.

The aurora was installed in France, i'm in France.

The error code is W003 grid fail, but it's normal, just after analyse the voltage, frequency, miso, all are ok, he write connecting in X secs... but when the main relay turn ON, the circuit breaker shut down and sure GRID FAIL W003.

I can't look the setting voltage because i have only the code to set the power curve, not the service code. No problem for me to look the service setting.
I look the ABB note to ask the service code, they ask the some data, i have P/N : 3G38997S000 and SN: 645040

Thanks Glen for your link, but my idea was not to charge battery with grid tie inverter, but to plug grid tie inverer to AC after the off grid inverter.

To explain more :

I have 3 hybrid inverter PIP 5058MK with 48v battery, 1 wind controler 5kw 48v to charge battery.

The hybrid charge battery the night, the battery are full the night. my wind controler stop wind turbine when battery full. So i lost the wind energy the night.

I specify that my batteries are out of order, they are just used for the operation of the whole.

My idea is to use the Aurora controler to plug on the House AC, to use night wind energy. So now i can see than it's impossible, hybrid inverter have no transformer, i already test and all inverter shut down by security.

So i think to plug on grid, just before the hybrid, like the the hybrid use the grid energy supply by grid and aurora inverter.
But my aurora shut down the circuit breaker.... i wonder what is problem.

Thanks

[Rob Beckers]

Germain, I'm not entirely following your story (or what you're trying to do with this inverter).

Regardless of that, my notes from Power-One tech support state that W003 should always be one of three things: Over/under voltage (+8%, -10%window), over/under frequency, or split-phase imbalance. You don't have split-phase in Europe, so that last one is likely not applicable. Of course, if you pop the breaker there's no Voltage and you get a W003 because it is (severely) under-Voltage, with 0V on the AC side...

How is your Aurora inverter connected? The DC input goes to the 48V DC battery bank? And the 230V AC output goes to your actual grid (as in the France national grid)?

-RoB-