I’m a bit confused at some of the specification items.
Cont. output power at 25 °C is 6400 W / 6.4kW - i’m assuming that’s the AC side, so that is 26A at 240v.
What then is the peak power of 15000W / 15kW? - is the above sustained and this is for short periods of time?
So is that 6.4kW output limit the max output for any loads across both AC outputs and any discharge through AC IN?
(Do you need additional protection to make sure you don’t exceed that 26A, or does it have that internally?)
What then is the 100A transfer switch and 100A max AC input current ?
What is the 50A “Auxiliary output” ?
The battery charge current is 110A - I assume that is at the 48v DC? - so that’s 5,280W, which is 22A at 240v AC?? (if there was no efficiency loss) - so it can draw a max of 22A from the grid to charge the battery?
So that’s around 6 hour charge time if you were to go from 0 to 100% (which you obviously wouldn’t) at 22A AC?
It can start a short duration load with that peak (think a big pump).
This is all it can invert from batteries.
It can passthrough much more.
This is what it can passthrough to loads so you can have loads on the ac2 out (which is switchable) and have solar and possibly some power assist from the battery to contribute to it.
This is the ac2 out capability (non critical loads) mentioned above that is switchable/programmable.
Pretty decent understanding. And the 22A is included in the transfer ability of 100A.
The only thing i’m still a bit confused about is this seems to be a contradiction?
I read this as AC OUT 2 can support a max of 100A of load and 6.4kW (~26A) can come from the battery + the rest will be drawn from AC IN?
This however seems to contradict the above?
So is it that AC OUT 1 + 2 can both support 100A of load - 50A each ??
It can then, using a grid meter back power the house by discharging the battery, but only with what’s left from the 26A max after AC OUT 1 & 2 have been powered?
Is AC OUT 1 (critical loads) therefore limited to 26A? - as otherwise in the event the grid feed disappears, it would not be able to support the load from the battery alone.
Yes also known as power assist. Although ideally if you needed that amount of power you would have a much larger system.
Most people would be using to shave 8kVa off the incoming service entrance, not adding to when it is that large.
Or you have a small service entrance such as 20A and are now adding the 26A to the 20a connection, or reduing their gird load.
No the full inverting power is possible on either one or both.
If the gird is available yes it can be used to power assist on the ac input. If you are using the ESS assistant.
AC OUT 1 can switch 100A straight from AC IN and stays on during grid loss.
AC OUT 2 can switch 50A - but goes off in the event of grid loss.
But if you are drawing 50A and loose the grid, what happens, when you can only draw 26A from the battery?
Will it “trip out”?
I am actually hoping to get the 48/10000/ 140-100, which does 8kW out - but i’ve applied for G99 and they may give an export limit and have implied that’s likely from the initial assessment.
If they do, is it possible to get a bigger inverter to support more load (particularly critical loads if the grid goes out) but then have an export limit using the grid meter to make sure it will never export more than a set amount to the grid?
(I’m not planning on exporting to the grid from battery - the only grid export is my solar excess - but I assume that if a high load suddenly gets turned off, it may take a bit of time for the grid meter to see that and the inverter react and stop discharging the battery, resulting in a spike for export going to the grid?
Yes pretry much, so it makes sense ro have rhat which you don’t want to be inverter supported on the ac2 out or on the input with the grid meter idea you had earlier.
Yes it is possible to limit export. There are several methods for it.
If there is a huge load and solar to cover it, and the load suddenly drops off, yes sometimes there is a bit of back feed. But it is less than a second worth. It is not normal for it to be the case from battery fed loads though.or at least hasn’t been so in my experience.
It is actually fairly normal for shoot back (back emf) from loads even in a non inverter system.
And does the inverter have ample protection for it’s outputs?
So you only need to provide normal over-current protection for any circuits based on cable - you don’t need to over-current protect the total to protect the inverter?
The inverter has no switch gear. While switch gear that is added is there to some degree for inverter protection, it is really there (and sized for) for wiring.
You need fusing for battery cables, and switch gear for cables installed on the inverter input, output and for bypassing. This would be regulation necessary anyway. For safety reasons.
The inverter does have its own protections are there.
For example it will shutdown if overloaded.
Will shut down of there is an ac wiring short circuit.
Will refuse/reject grid connection if there is a neutral and line mixup.
