Hi,
I have a FoxEss H1 G2 6kW inviter with 3x EP4800 batteries for just under 15kWh capacity. It only seems to discharge at a maximum of 3.6kW, even if none of it goes to the grid (e.g. I'm using around 4kW in the house at night for a brief period and I require grid import to top up around 400W. Why is this and how can the battery discharge increase close to the 6kW inverter limit?
I can pull the peak values as I have a Modbus device connected to the home assistant FoxEss integration.
Max battery discharge: 3.6kW
Max battery charge: 3.6kW
Max Feed in: 5.6kw
Thanks
Liam
Can you look at your modbus information and see what Modbus Max Charge & Discharge rates are set to ?
3 * EQ4800's only have a nominal voltage of 134V, from memory the G2 has a 40A charge/discharge limit - so max power should be 5.3kW (at 25C) but that will reduce at lower SoC's and temperatures.
3 * EQ4800's only have a nominal voltage of 134V, from memory the G2 has a 40A charge/discharge limit - so max power should be 5.3kW (at 25C) but that will reduce at lower SoC's and temperatures.
Hi, I've posted a screenshot of the rates which are set. Should the discharge current be higher?
Yes, the recommended (continuous) charge/discharge current is 30A, but they have a maximum of 50A.
The H1 G2 has a maximum (default) of 40A.
If you are not looking to have long sustained high discharge periods (as some users do that dump their batteries to the grid), I would suggest going with the default setting of 40A for both charge and discharge.
The H1 G2 has a maximum (default) of 40A.
If you are not looking to have long sustained high discharge periods (as some users do that dump their batteries to the grid), I would suggest going with the default setting of 40A for both charge and discharge.
Are you on a G99 fast track DNO? With that one can only export 3.68 kwh. There is a G100 restriction in place. Maybe not that but this is happening to me.
If it was G98/G100 restriction you wouldn't set that using the battery charge/discharge current controls, it would have to be the Export Power limit instead (Settings, on-grid) to be G100 compliant.GarethArch wrote: ↑Tue Jul 07, 2026 4:26 pm Are you on a G99 fast track DNO? With that one can only export 3.68 kwh. There is a G100 restriction in place. Maybe not that but this is happening to me.
Yes I do that the G99 fast track DNO. I didn't realise this was a limit of 3.68kW... I thought G98 was a 3.68kW limit? Is this impacting your grid export as I'm exporting over 4.5kW on most days in full sun. Also I didn't think the DNO limit would apply to battery discharge within the home... This would be the export power limit which is a different setting?GarethArch wrote: ↑Tue Jul 07, 2026 4:26 pm Are you on a G99 fast track DNO? With that one can only export 3.68 kwh. There is a G100 restriction in place. Maybe not that but this is happening to me.
Sorry I didn't read your post before sending mine! Pretty much in line with what you saidDave Foster wrote: ↑Tue Jul 07, 2026 4:40 pmIf it was G98/G100 restriction you wouldn't set that using the battery charge/discharge current controls, it would have to be the Export Power limit instead (Settings, on-grid) to be G100 compliant.GarethArch wrote: ↑Tue Jul 07, 2026 4:26 pm Are you on a G99 fast track DNO? With that one can only export 3.68 kwh. There is a G100 restriction in place. Maybe not that but this is happening to me.
Hi,
Apologies I was only talking about export to the grid. My installer limited the export to approx. 3.68 kwh due to the DNO G99 fast track requirements not to exceed 16 amps. However, the FoxCloud app does not cope with it well as it just adds the surplus to my usage. Above 3.68kwh my usage fluctuates in line with solar panel generation at the moment.
Apologies I was only talking about export to the grid. My installer limited the export to approx. 3.68 kwh due to the DNO G99 fast track requirements not to exceed 16 amps. However, the FoxCloud app does not cope with it well as it just adds the surplus to my usage. Above 3.68kwh my usage fluctuates in line with solar panel generation at the moment.