Hi, I have a Goodwe GW 5048-EM with batteries. I noticed sometimes the inverter starts charging the batteries from grid until the soc reaches 100 % like that:

The graph shows how the batteries are charged from grid at night. How is that possible?

The working mode is set to general, what could cause this?

 

Edited April 16, 20233 yr by Claydol

Strange behaviour at night. Charing to20 % then discharging to 10 %

Edited May 2, 20233 yr by Claydol

Make sure your CT coil is installed correctly and that you did a successful "Meter Test"

What changed between those two screenshots?

The first shows power being drawn from grid, but the battery SOC line doesn't change gradient. The SOC increases at a steady rate, regardless of draw from grid. The draw from grid is to service a load.

In the second shot The SOC increases when there is draw from the grid, but the draw from the grid still mirrors the load. 

The first shot shows a fairly constant charge current being sent to the battery (purple trace). OK... so that explains the slowly increasing SOC. The grid power is servicing a load (geyser?). 

The second shot shows no current either way for the battery during the night, so why is SOC reducing? Very odd.

I would, as @FrancoisV suggests, check the CT coil installation. Also check the settings on the inverter. Don't assume what they are, check them. I can't be more specific than that because yours is a different model from mine, and I don't want to assume that the two have the same interface.

If these are lithium batteries and you have a comms cable between batteries and the inverter, it would be a good thing to get that cable checked too. I have seen incorrectly wired comms cables interfere with the operation of the Goodwe smart meter.

On 2023/05/03 at 3:21 PM, Bobster. said:

What changed between those two screenshots?

The first shows power being drawn from grid, but the battery SOC line doesn't change gradient. The SOC increases at a steady rate, regardless of draw from grid. The draw from grid is to service a load.

In the second shot The SOC increases when there is draw from the grid, but the draw from the grid still mirrors the load. 

The first shot shows a fairly constant charge current being sent to the battery (purple trace). OK... so that explains the slowly increasing SOC. The grid power is servicing a load (geyser?). 

The second shot shows no current either way for the battery during the night, so why is SOC reducing? Very odd.

I would, as @FrancoisV suggests, check the CT coil installation. Also check the settings on the inverter. Don't assume what they are, check them. I can't be more specific than that because yours is a different model from mine, and I don't want to assume that the two have the same interface.

If these are lithium batteries and you have a comms cable between batteries and the inverter, it would be a good thing to get that cable checked too. I have seen incorrectly wired comms cables interfere with the operation of the Goodwe smart meter.

 

On 2023/05/03 at 2:48 PM, FrancoisV said:

Make sure your CT coil is installed correctly and that you did a successful "Meter Test"

I will try, but I checked several times. The fact is this issue doesn't occour every day, but it's happening like once per week or every two weeks. The inverter suddendly starts to charge the batteries from grid, despite enough solar power and/or very low load from the house, untile the soc reaches 100 %....