H1-6.0-E: Battery no longer charging on negative grid load after firmware update

[is_battery]

After a firmware update of my H1-6.0-E inverter and the ECS-2900-2 battery stack, the battery is no longer charged when the grid load is negative because of PV (PV is not attached to the H1 inverter, but has its own stack of micro-inverters, so everything is AC-coupled), instead I get (unwanted) grid feed-in. The battery used to be charged by the amount of power produced by the PV before the firmware update. I also did a complete shutdown and restart of the whole inverter/battery system.

Only when the SoC goes way below the min SoC setting the battery is topped up slightly until it reaches min SoC setting.

Are there any settings I would have to change after the firmware update?

Firmware is now:

Master : 1.64
Slave : 1.02
Manager : 1.71

Battery Master: 2.001
Battery Slaves: 1.14

I also contacted my installer, but due to upcoming holiday season I haven't heard anything back yet.

[is_battery]

After both setting a bunch of parameters to the same value that was shown in the web UI, and contacting Foxess support, battery charge on negative load seems to work again.

I'm unsure whether that is now caused by (re)setting the parameters or by something the support did. The parameters all do look unchanged, though, so perhaps it really was resetting the parameters that was required.

[is_battery]

I thought too soon that battery charging works as expected.

It seems that if the battery SoC is at or above minimum on-grid SoC, the battery is charged if there is negative load.

If the battery SoC is below the minimum on-grid SoC, I get feed-in instead of battery charging.

[is_battery]

The problem is definitely related to the minimum on-grid soc setting. If the soc is below that, it feeds-in on negative load, then when I set the minimum on-grid soc to a value lower than the current soc, the inverter switches from feed-in to battery charging.

[Dave Foster]

The problem is definitely related to the minimum on-grid soc setting. If the soc is below that, it feeds-in on negative load, then when I set the minimum on-grid soc to a value lower than the current soc, the inverter switches from feed-in to battery charging.

Can you check that the inverter thinks you have a CT clamp installed (assuming you are using a CT clamp to measure flow and not a meter) - it sometimes becomes unset after a firmware update.

You can check if you go into Settings, Feature, Meter/CT - it should be set to CT, if it is not change it to CT and set it - the inverter will usually restart and hopefully that should be that.

[is_battery]

Can you check that the inverter thinks you have a CT clamp installed (assuming you are using a CT clamp to measure flow and not a meter) - it sometimes becomes unset after a firmware update.

You can check if you go into Settings, Feature, Meter/CT - it should be set to CT, if it is not change it to CT and set it - the inverter will usually restart and hopefully that should be that.

I have a 3 phase meter attached via modbus for measuring the current flow afaics. That is also what is set in the settings at Meter1/CT1 ("3P Meter").