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akofler avatar image
akofler asked

ESS PV Inverter ac-input not charging battery

Dear all,

I have:
- Multiplus-II 48/8000 v494
- LiFEPO4, Orion BMS via Can, 48V
- PV Inverter parallel to ac-input
- Energy meter EM24 on PV inverter, configured as PV-Inverter
- Cerbo GX v2.84
- ESS & DVCC enabled
- Scheduling charge disabled

Setting up in ESS the mode with or without BatteryLife the charge power is going from 0- 100W, not more, even there is excess PV power:

1647249721381.png

Setting the ESS mode to Keep Battery charges, the charger charges well with the maximum current.

Why are there no dots from the PV Inverter to the Multiplus ? It seems that for some reason / missconfiguraion the excess power is not calculated well.

It seems that the Consumption is almost as high as the PV production.


Do you have any suggestions ?

Many thanks

Andreas



Some config Screenshots:

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1647249925069.png1647249916623.png1647249847706.png

1647249899078.png

1647249941545.png

1647250050266.png


AC PV Coupling
1647249721381.png (28.8 KiB)
1647249847706.png (33.2 KiB)
1647249899078.png (33.7 KiB)
1647249916623.png (30.4 KiB)
1647249925069.png (23.9 KiB)
1647249941545.png (13.1 KiB)
1647249997241.png (25.0 KiB)
1647250050266.png (29.9 KiB)
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1 Answer
markus avatar image
markus answered ·
You will need an additional grid meter for the PV inverter on AC-in to work.
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akofler avatar image akofler commented ·

Dear Markus, sadly the connection PV/Grid is inside a sealed chassis, so i can't install a grid meter. But anyway, Is the option Grid Metering --> Inverter Charger not enogh ?


1647257461973.png


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markus avatar image markus ♦♦ akofler commented ·

Unfortunately, to bring the ESS system to charge from the PV-inverter on AC-in, you would have to reconfigure the system to have 2 energy meters, one measuring PV and one measuring grid.

like this:

1647259809472.png

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