question

Fredrik Häggblad avatar image
Fredrik Häggblad asked

ESS Throttling MPPT's to zero, when Grid Feed In is active.

Hello ALL!

(I'm a newbi in posting to this community, please be kind to me
If I doesn't "present" my problem in the short, clear and detailed way. :-)
)

I see a lot of posts related to MPPT's that are holding back there power.
But none of them seems to be an exact match for my problem.

In my ESS configured system i have a feed-in limit set to 12kw, witch I cant reach at the moment.
But i have seen 10+kW.

My house is supplied by 3-phase 16A grid.

I have one Multiplus-II 5000 on L1 and another on L2 configured as 2-phase..
In front of my Multi's I have a SMA TriPower 7kW.

Could someone please help me to understand, and help me fix the problem I have.
More detailed info you will find in supplied PDF.
My ESS issue 21-09-07 with feed-in Active.pdf

Please post me if additional info is needed!
I really want to solve this issue asap.

Br
/Fredrik

Multiplus-IIESSMPPT SmartSolar
my-ess-issue-21-09-07-with-feed-in-active.pdf (182.9 KiB)
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Fredrik Häggblad avatar image Fredrik Häggblad commented ·
Some additional info.

Before summer 2021. I upgraded my fully functional installation, same components as I have now. But I rewired my 24V batterybank to 48V and changed my Multiplus 24/5000 to two Multiplus-II 48/5000.

It is after this change I got my problem with MPPT power throttling.

Br

/Fredrik


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Salim Naufal avatar image Salim Naufal Fredrik Häggblad commented ·
I am facing the same issue. I have a 12.5 kilowatt solar capacity but when the grid is present, the MPPTs throttle down to 200 Watts and all the consumption comes from the grid which is super expensive.
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shaneyake avatar image shaneyake commented ·
Have you tried removing the feed back limit to see if that fixes it?
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Fredrik Häggblad avatar image Fredrik Häggblad shaneyake commented ·
I don't have a configured feedback limit set in my system.


/Fredrik


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1 Answer
hardy-tuner avatar image
hardy-tuner answered ·

which kind of gridmeter you use?

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Fredrik Häggblad avatar image Fredrik Häggblad commented ·

I use the Energy Meter EM24, over RS485.

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