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Ingo avatar image
Ingo asked

Another Inverter Overload with ESS question

For some time I've noticed my inverter give overload warnings. On investigation I found that if my load exceeds the inverter capacity, let's say 5000W then I have an overload warning even when the grid is connected and solar producing power.

My configuration is:

Grid Connected

Quattro 5K, 481

RS450/100 producing +-3000W

Load +-5000W

Battery supply remaining +-2000W

Grid supplying some watts, minor values though.

Both ACOut1 and ACOut2 in use as per normal No Grid Failure scenario.


Why would the inverter give an overload warning when it's maxed out on Inverter power but the connected grid is still connected to provide 'top-up' when needed?

We all know the inverter is at max so while the grid is connected I don't really care. When the grid is NOT connected then YES, then I need to know about it. Can that setting not be amended to not warn me on a daily basis that my inverter is working hard for it's money?


Ingo

MultiPlus Quattro Inverter Charger
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3 Answers
Alexandra avatar image
Alexandra answered ·

@Ingo

A warning is just that. You know you are pulling more than the inverter can invert. It is a warning and in the even of grid faliure it will become an alarm.

The inverter will be trying to carry the whole load if you have set the grid set point down as well and be trying to power assist so working hard.

Have you set the max inverter power in the ess menu? on a 5kva set it to around 4000 or alower if you are in a hotter area. I have seen is make a difference in any case to the warnings. Still get them though.

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Ingo avatar image Ingo commented ·

Thanks @Alexandra I thought of setting the limiter to 4000 but then decided against it. My thinking is: Let the inverter run full taps, it's built for that and why hamstrung the unit down to a smaller value.

The warnings, while grid-connected, just seems pointless to me in this situation as I am not going to lower the load on the inverter. If it needs more power it will just import power from the grid - which I am fine with.

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marv21 avatar image
marv21 answered ·

"The warnings, while grid-connected, just seems pointless to me in this situation as I am not going to lower the load on the inverter. If it needs more power it will just import power from the grid - which I am fine with. "

Thats my thinking too. Iam in the same Situation. Getting spammed with "Overload" Warnings. Its annoying that the Inverter themselfs drive themself that hard to get this Warning. I now just disabled it the Warning. Somewhere I can understand that a Warning is not an Alarm, but ON-Grid its just useless to have it, if there is no Danger ahead.

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ejrossouw avatar image ejrossouw commented ·
Are you using ACOUT for loads? Do you require an essential load function?
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shaneyake avatar image shaneyake commented ·

I like having the warnings because it is letting you know that the inverter is limiting because it is getting too hot. If you increase the cooling or lower ambient temperatures you can get a few more watts out of the inverter. Warning is just there to say hey, I had to reduce power because things were getting hot. You can see the warnings on VRM without getting notified.

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dcsonka avatar image
dcsonka answered ·

Hi,

I wrote a doc on my experience with similar issues. See attached.

Limit inverter power.pdf


limit-inverter-power.pdf (345.7 KiB)
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