New FoxESS AC Inverter and Battery Meter 2 showing combined solar and battery output

[jblackburn]

Hello,

I have a new system: Fox AC1-5.0-E-G2 Inverter with 10kWh battery. There's separately solar using Enphase microinverters.

I have a strange issue where the data looks wrong, and the Fox ESS app appears to be over-reporting house consumption. The issue appears (to me) to be that meter 2 is measuring combined solar output and battery output. The main clamp appears to be correct, such that it's correctly balancing the house demand vs the grid. And the battery discharge output looks correct too.

For example, this morning my solar is generating 0.7kW, the Fox is discharging at 1.8kW, leading to a house demand of ~2.4kW. However the FoxESS app is showing house load of 4.1kW. i.e. the "Gen" is double counting the battery discharge.
Similarly when charing the battery the app is showing the house as negative load - which I believe is also incorrect.

Any tips on how to resolve?

[Will]

Morning,

Ct2 must only be connected to the ac output of the third-party solar inverter; if it is also seeing the output of the fox system, it will cause data issues in the app. Good news is that the battery charging and discharging is controlled by CT1 so shouldn't hurt the system while you get it fixed.

[jblackburn]

Thanks - my thoughts exactly. Not a big problem for the system - just the data looks weird. Will have a look…