How to request firmware update by support?

[AndySimpson]

Sorry I feel like I’m missing something obvious but how do I request the firmware upgrade from fox support?

I have a H1 Legacy Inverter it appears and the firmware is quite old thanks.
H1-3.7-E
Master 1.48
Slave 1.02
Manager 1.50

Cannot see a support request in the app. Only a contact us with email addresses.

[Dave Foster]

If you have a gen 1 inverter, whilst there is newer firmware available, the general advice is unless you are suffering problems or missing a function it’s better to run with what you have (if it is gen1 with those firmware versions you will be missing the v1 scheduler); many of the newer features have been added to generation 2 of the inverters and sadly not gen 1.

You can ask Fox to update your system in the V2 app, click ‘Me’, Contact Us, Support - fill that in and when you submit it will raise a ticket (or you can email them but include your inverter serial number in your request)

[AndySimpson]

Thanks for the quick reply. Basically with the new App they have now removed the options for forced charged so I can no longer set times to charge the battery from the app. I can still do via the Web portal.

Do you know if Firmware upgrade to Gen 1 will then allow schedules to be used in App ?
And is it worth the risk of firmware upgrade…..

Thanks

[Dave Foster]

Thanks for the quick reply. Basically with the new App they have now removed the options for forced charged so I can no longer set times to charge the battery from the app. I can still do via the Web portal.

Do you know if Firmware upgrade to Gen 1 will then allow schedules to be used in App ?
And is it worth the risk of firmware upgrade…..

Thanks

Ahh ok, yep the latest gen 1 firmware is stable, and does support schedules albeit it doesn't let you control the charge power but it will do exactly what the charge periods did.

Alternatively the old v1 app does still work for charge periods, but much better is Energy Stats by Al Priest (works on iOS and Android)

[joezhouq]

I recently had a KH9.9 installed and noticed that an updated master firmware v1.60 is available for the inverter, while the current version installed is v1.68.

Is there a release note available that we can review to determine whether an upgrade is necessary? For example, it would be useful to know whether the update addresses issues such as the inverter operating temperature reaching up to 90 °C during Brisbane summer conditions.

Our installer is currently very busy and has not been responding to requests. Is it possible for the owner to perform the firmware upgrade via Wi-Fi, rather than using the installer’s dongle, which we do not have access to?

Thank you for your advice.

[evilbunny]

Is there a release note available that we can review to determine whether an upgrade is necessary?

Yes, https://fox-ess.tech/firmware-release-notes/

For example, it would be useful to know whether the update addresses issues such as the inverter operating temperature reaching up to 90 °C during Brisbane summer conditions.

I'd be very surprised if that were accurate because that's the sort of temperatures in engine bays and electronics in there need to be made to a much higher spec.

Does your inverter or battery get hit with direct sunlight by any chance?

Is it possible for the owner to perform the firmware upgrade via Wi-Fi, rather than using the installer’s dongle, which we do not have access to?

There should only be the 1.

As to how to get full access to the battery you bought and supposedly own:

https://foxess.evilbunny.org/doku.php?i ... er_account

[joezhouq]

Thanks for the reply, evilbunny.

The latest release note from the link you referred to shows: 2025/12/23 – Master updated from V1.55 to V1.58. Is there any information about changes from V1.58 to V1.60?

The battery and inverter are installed in my garage. The inverter temperature can reach around 90 °C during peak solar irradiance, which has also been confirmed by another Fox ESS owner experiencing the same behaviour:

https://www.foxesscommunity.com/viewtopic.php?t=2844

The good news is that I started using a fan to blow air across the inverter yesterday, and the situation improved—the highest temperature today was 63 °C.

I’m also not quite sure what you meant by “1” regarding the firmware upgrade. Did you mean that the firmware can now be updated via Wi-Fi?

[evilbunny]

The latest release note from the link you referred to shows: 2025/12/23 – Master updated from V1.55 to V1.58. Is there any information about changes from V1.58 to V1.60?

That's all there is unfortunately.

The battery and inverter are installed in my garage. The inverter temperature can reach around 90 °C during peak solar irradiance, which has also been confirmed by another Fox ESS owner experiencing the same behaviour:

https://www.foxesscommunity.com/viewtopic.php?t=2844

The good news is that I started using a fan to blow air across the inverter yesterday, and the situation improved—the highest temperature today was 63 °C.

The picture in that thread shows their inverter and/or battery could be hit with direct sunlight and direct sunlight makes temp sensors read much higher than actual.

If your inverter/battery is sheltered and isn't exposed to direct sunlight then you may need an even bigger fan.

I just checked the stats for mine and even though I only have 4kW of panels the inverter only hit 49.8C today during peak solar production and only slightly higher at 53.5C when forced discharging at 5kW and I have no fan on it.

Today wasn't a cool day here, my PWS recorded 35.1°C just before 3pm AEDT, BoM says Brisbane only hit 32.7C about noon AEST and due to altitude (~615m) heat dissipation should be a bit worst due to slightly thinner air compared to sea level.

Even the nearest BoM site recorded a fraction higher than Ipswich did today at 33.8C by 3:30pm AEDT which is located 30km east of here, but that town is on a river and is always a degree or 2 cooler than where I live.

So I'm at a loss as to why your inverter would have hit egg frying temps.

I’m also not quite sure what you meant by “1” regarding the firmware upgrade. Did you mean that the firmware can now be updated via Wi-Fi?

Only 1 data logger/WiFi device, and it can be told remotely to download new versions and update itself like Fox have been triggering.

Installer accounts can trigger updates too, and it's worth timing updates with cheap power times cause when the battery restarts the house imports from the grid.

[joezhouq]

I believe the higher temperature may be due to the following factors:

Reduced efficiency at high output power by derating. When the inverter operates near its peak output (around 9.9–10 kW in my case), even if efficiency is nominally highest in this region, the absolute power loss, especially produced by rerating generating much more heat across the electrical system. This requires properiate heat dissipation from the heatsink design. The current cooling arrangement may not be sufficient under sustained high load. Additional forced airflow inside the enclosure, such as a fan to assist heat removal may be neccessary.

Garage ventilation. The inverter is installed in my garage, where airflow may be limited. I am currently using a Vornado 660 Whole Room Air Circulator Fan (30.5 cm) positioned about 200 mm in front of the inverter to improve airflow. However, I am considering a more direct approach, such as attaching two PC case cooling fans to the inverter heatsink.

Could you confirm whether my KH9.9 uses a single data-logger/Wi-Fi device based on the attached screenshot showing the “Upgrade Now” option in the app? I would like to proceed cautiously with firmware updates to avoid any risk of bricking the device, and that is why I am looking for thre release note for the version 1.60 in case it is not essential to do.

[evilbunny]

The inverter is installed in my garage, where airflow may be limited.

Out of curiosity, what temps are being reported from your battery?

Also it looks like the reported ambient temperatures from my system isn't right since it's only up to 24.8C today.

Code: Select all

variable: ambientTemperation
min: 36.7℃
max: 45.0℃

However, I am considering a more direct approach, such as attaching two PC case cooling fans to the inverter heatsink.

I've seen a post about someone describing doing that.

Could you confirm whether my KH9.9 uses a single data-logger/Wi-Fi device based on the attached screenshot showing the “Upgrade Now” option in the app? I would like to proceed cautiously with firmware updates to avoid any risk of bricking the device, and that is why I am looking for thre release note for the version 1.60 in case it is not essential to do.

If you can see data in the app and/or web portal, then AFAIK it can be remotely updated.

If you aren't feeling particularly brave you may need to hang out for a bit until someone posts about their experience when they did ok the update, or if the update was was triggered by Fox and they had no choice in the matter.

As for bricking it, if it's an official update and not some hacked third party version, you should be covered under Australian Consumer law, although it'd still be an inconvenience until it was fixed.