Hi,
I have a FOX ESS system with an EP12 battery and a 5 kW hybrid inverter installed on 18th December. It was sold with the idea of overnight off-peak charging from Ovo, but I was later informed this option is no longer available.
The system is set to Self Use mode with a minimum SOC of 10%, 10% battery reserve, and grid charging turned off. However, I’ve noticed the system exporting to the grid while the battery is only around 38%, and importing power even when solar generation is active. Overnight, the battery also charged above the reserve level, which I didn’t expect.
Can anyone briefly explain how Self-Use mode is supposed to behave, and whether it’s possible to access or adjust more advanced settings beyond the basic controls?
Thanks.
Normally Self-Use mode is as follows: The Solar (PV) will first supply the house Load, then any excess will fill the battery up, then once the battery is full, it will then export the remaining PV.
Example, 5kW of PV, and a house load of 1kW, the battery would charge at 4kW until full, and once full, the 4kW becomes export to the grid.
If OvO tariff is pants, or is causing your grief, it might be an idea to look at Octopus.
Here is Will's referral code post viewtopic.php?p=3#p3
Example, 5kW of PV, and a house load of 1kW, the battery would charge at 4kW until full, and once full, the 4kW becomes export to the grid.
If OvO tariff is pants, or is causing your grief, it might be an idea to look at Octopus.
Here is Will's referral code post viewtopic.php?p=3#p3
Ever since I updated the app to the newer version I have experienced the same thing. the older version charges the battery first then start sending the rest to the grid but it seems to send the electricity to the grid first instead. Also when I force to discharge the battery to sell to the grid, it does it but even when it has enough charge left in the battery, it uses electricity from the grid instead of discharging from the battery. The new update has been really annoying.
Well I’ve made the mistake of Upgrading the Fox 2.0 App and it looks like I’m now on v2.2.2.
With this came the availability to Upgrade firmware on some of the hardware and I think the batteries and the WiFi dongle were showing as needing an update, so I duly obliged and completed the update.
Since then it’s been a disaster .
The Mode schedule I had been using without incident for over 12 months was rendered useless!
The main culprit seems to be that in Self Use mode, ie during the day when I want to Discharge the batteries to supply the House load, the Inverter is switching into Backup mode and trying to constantly charge the batteries to 100% from the Grid and supply any House load from the grid, ie the opposite of what you want when the Tariff is at its highest level in the day.
So far no luck with Tech support on this firmware change cock-up!!!!!!!
With this came the availability to Upgrade firmware on some of the hardware and I think the batteries and the WiFi dongle were showing as needing an update, so I duly obliged and completed the update.
Since then it’s been a disaster .
The Mode schedule I had been using without incident for over 12 months was rendered useless!
The main culprit seems to be that in Self Use mode, ie during the day when I want to Discharge the batteries to supply the House load, the Inverter is switching into Backup mode and trying to constantly charge the batteries to 100% from the Grid and supply any House load from the grid, ie the opposite of what you want when the Tariff is at its highest level in the day.
So far no luck with Tech support on this firmware change cock-up!!!!!!!
No idea if this will help, but like most electronic devices in this world, sometimes during updates they get screwed.
Have you tried switching your system off then rebooting it ?
I’m seeing a number of users frustrated with changes to previously working systems, that after updates are now not working as required, whereas others (myself included), have no issues after updating the app and fw.
My friend had similar issues to yourself, and after suggesting a power down and back up, his system reverted to working normally.
It cannot all be user error, so something else is in play.
The standard 3 pin reset cures a lot of ills in the tech world.
For what it’s worth my app is 2.2.2. and is set as image below, and works exactly how most people want it to, house load, charge battery then export when full and solar excess available.
It grid charges every night as set.
Have you tried switching your system off then rebooting it ?
I’m seeing a number of users frustrated with changes to previously working systems, that after updates are now not working as required, whereas others (myself included), have no issues after updating the app and fw.
My friend had similar issues to yourself, and after suggesting a power down and back up, his system reverted to working normally.
It cannot all be user error, so something else is in play.
The standard 3 pin reset cures a lot of ills in the tech world.
For what it’s worth my app is 2.2.2. and is set as image below, and works exactly how most people want it to, house load, charge battery then export when full and solar excess available.
It grid charges every night as set.
Thanks for the reply and it gives me some hope that there is a solution to this.
I’m away from the house for a couple of days, so no chance for powering down/up the system to reboot everything.
It would be nice if that’s all I have to do when I return.
For now I’m manually changing the Import power setting to 0kW during “Self Use” mode times, hence the system cannot draw any power from the Grid and the system has to then use Battery power to supply House load.
Later on at night when Force charge times are set (23:30 to 05:30), I set the import power back to the usual 6kW level (inverter Max power), then the batteries charge at Off peak periods.
So for now this is my workaround, but it is so frustrating.
I’m away from the house for a couple of days, so no chance for powering down/up the system to reboot everything.
It would be nice if that’s all I have to do when I return.
For now I’m manually changing the Import power setting to 0kW during “Self Use” mode times, hence the system cannot draw any power from the Grid and the system has to then use Battery power to supply House load.
Later on at night when Force charge times are set (23:30 to 05:30), I set the import power back to the usual 6kW level (inverter Max power), then the batteries charge at Off peak periods.
So for now this is my workaround, but it is so frustrating.