KH10.5 grid charge limitation issue

Can · Tue Jul 09, 2024 9:29 pm

Hi,

Has anyone raised the "GridChargeCurrentLimited" issue with FoxESS UK? This feature creates soft limit to the maximum current draw as measured by the CT. The range offered on the web configuration is capped at 50A (~12kW) however this significantly throttles the KH battery charge rate when other loads are present. Charging an EV at 7kW + baseline is causing the FoxESS battery charge rate to regulate at ~4kW.

Whilst this is not a practical issue during the summer, this is going to pose huge issues during the winter months.

Will, have you experienced this?

https://i.ibb.co/mNVJF8h/Screenshot-202 ... -21-31.png

Fri Jul 12, 2024 9:19 am

Are you charging the EV off the Inverter (solar/battery) itself ?, if not it’s better to keep the EV charger in front of the inverters CT so that it doesn’t see the load.

I’m not sure on the gridchargelimit - I can see why it’s a good idea for the European markets with PeakShaving etc.. (i’ll give Will a nudge)

Fri Jul 12, 2024 8:45 pm

GridChargeCurrentLimited on a K series is the battery amps limit when you charge from grid, not a dynamic grid load limiter as you suggest so would have no impact on your ev charger. Are you sure the EV charger isn't doing it's own load limiting?

Can · Sat Jul 13, 2024 10:21 am

Will, this is 100% a bug for FoxESS. Note the effects of the EVSE starting near 00:30. 12kW is grid volts at 50A which is the ceiling for that setting.

Dave, I need to have my CT config as is for many reasons inc solar divert.

Latest FW etc.

Can · Tue Aug 27, 2024 10:18 pm

Dave Foster wrote: ↑Fri Jul 12, 2024 9:19 am Are you charging the EV off the Inverter (solar/battery) itself ?, if not it’s better to keep the EV charger in front of the inverters CT so that it doesn’t see the load.

I’m not sure on the gridchargelimit - I can see why it’s a good idea for the European markets with PeakShaving etc.. (i’ll give Will a nudge)

Finally got around to reconfiguring my incoming supply. I’m now running a modbus meter and CT with the EVSE charger downstream of the inverter. On CT the inverter cannot see the EVSE as a load, but can using the modbus meter.

Not overjoyed with the faffing around but I can still dump l excess into the car (currently have 50kWh @ 450V) as and when whilst maintaining the ability to pull more than 50A overnight.

Fox need to address this.