Grid tie inverter (more usage understanding)

I have little knowledge about grid tie inverters. I know that it can only work or produce power output when it is connected to the grid.,it will sencr the grid for voltage, frequency and stability of the grid power.before it can synchronisely add its power to the grid.
My question is can it be connected to a high frequency or low frequency inverter instead or normal grid?. Can a limiter help in this situation?

Potentially yes but WHY?! You cannot just hook it up because that will kill your gear.

What is it you actually want to do? if you only want to power things get a off-grid inverter or just a normal inverter instead. Both need battery to function as reserve since solar isnt enough.

I have an existing 1kw off grid inverter with 1400w of panels and 1040 cells of powerwall to support the night power..
Now i want an extra power for my freezer during day time and i don't want to change the off grid inverter to a bigger one .
What am thinking is that if i can get a grid tie inverter and 500w of panels to work with grid tie inverter. Then i can connect it with the off grid inverter so that when there is sunlight it will support the off grid inverter it can then power my freezer without problem.

So you are wanting to create a mini grid on the output of an"offgrid" inverter, which is being fed from your batteries (which is currently powered by yourmain grid tie inverter) by using another grid tie inverter and more panels ?

Sean said:

So you are wanting to create a mini grid on the output of an"offgrid" inverter, which is being fed from your batteries (which is currently powered by yourmain grid tie inverter) by using another grid tie inverter and more panels ?

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It's only a regular inverter that i have presently
No grid tie inverter yet.
I am planning to get agrid tie inverter to support the regular inverter.

ibikunle said:

No grid tie inverter yet.
I am planning to get agrid tie inverter to support the regular inverter.

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.... you've allready got one grid tie inverter ? (you said that previously)

Get A bigger inverters from the start. The extra inverters wont help you to Power the freezer as such. IF your Main inverters cant start the freezer from the beginning you need to sort that. There Will be clouds or No Sun eventuellt.

IF you just need more solar get A charge controller for solar.


A grid tid inverters need a place where to send the excess. Your inverter wont like that. Even with a sensor you Will get issues.


Potentially doable but not for someone that asks The question better to get proper Gear or an inverter that can handle parallel operation.

Or get an inverter for freezer only

All a grid tie inverter is a supplement to the "Grid" poweryou receive.(not fromaninverter)
Let's say you are pulling 1000 watts from the grid and you have a 500 watt grid tie inverter the inverter will supply the 1st500 watts and the grid will supplement the rest. Now if you have a low frequency inverter that is capable of producing 2000 watts of true sine wave output and you add a 500 watt grid tie inverter to it that should theoretically give you 2500 watt output right? Well yes and no. First of a goodinverter is designed to take surge loads of about twice its rated capacity for about 20 seconds and survive. Not so with a grid tie, The grid takes the surge while the grid tie will just plug along with its 500 watt output it is not designed to take the surge. A grid tie will respond to demand in its own time as the reserve needed is supplied by the grid or batteries as daromer said.

As far as supplementing an inverter with a grid tie inverteris kind of silly as the frequency may change slightly on the inverter and the grid tie would drop out whenever that happens to resync. Probably would not last long either as both the grid tie and inverter would fight each other.Also if the inverter goes offline so will the grid tie with its anti islanding feature. My suggestion would be to get another inverter and stack if you have a model that allows that or get a bigger inverter for your main loadsand have the present inverter power just the freezer.

A cheap grid tie will cost as much as a cheap inverter.
Just saying

Wolf

Sean said:

ibikunle said:

No grid tie inverter yet.
I am planning to get agrid tie inverter to support the regular inverter.

Click to expand...

.... you've allready got one grid tie inverter ? (you said that previously)

Click to expand...

I said that if i can get a grid tie inverter and 500w of panels to work with the grid tie inverter that i want to buy..
I have not bought any grid tie inverter yet.

I say forget the grid tie inverter setup. Get another standard inverter, even a low rated one, and just wire the circuit for the fridge to that one inverter. If price is an concern, this is the way to go. If you have the funds, buy a larger inverter and replace the existing one and the smaller one for lights and such for backup, or for a second building/circuit.

Using a grid-tie with a standard inverter that is not designed for it will destroy the standard inverter. They are designed to output a certain voltage. A grid-tie unit reads the output voltage of the grid and outputs voltage higher than that so that it can feed back. This forced voltage could start causing a lot of popping noises to come from your standard inverter

Thanks to all for your valuable contribution about the issue.
I will get a bigger regular inverter about 3kw that will take all of my loads.then add 500w or more to my panels. I think that will do it.

ibikunle said:

Thanks to all for your valuable contribution about the issue.
I will get a bigger regular inverter about 3kw that will take all of my loads.then add 500w or more to my panels. I think that will do it.

Click to expand...

Good and safe choice

Wolf

ibikunle said:

Thanks to all for your valuable contribution about the issue.
I will get a bigger regular inverter about 3kw that will take all of my loads.then add 500w or more to my panels. I think that will do it.

Click to expand...

That's what we're here for. Hate to see ya get the grid-tie and blow up two devices. Your idea seems good in theory, but in practice it would be a nightmare. Glad you came and asked about it first.

I think thats wise to do! I understand the question but in real life its actually better to go the correct route