FoxESS Community - Owners & Installers Forum

Good morning. We have have been away for a week and our daily usage was between 8 and 10 kw.
all we left connected was the fridge freezer, WIFI. tv stand by. Would this be enough to use that amount of kW while
we were away.
Please contact me if you need any more info [we are with Octopus]

Regards Dave Clements.

Your inverter needs energy to run, it uses power to run itself to convert the DC into AC. If you have a battery, there is energy needed there also to run BMS.

It has been warm, so your fridge freezer would work harder, depending on inside temperature of the home. If all locked up, it could have been warmer than if you was at home to open windows.

As we are seeing in another recent thread, depending on your Inverter, this could use 4.8kWh a day for some of them (typically less than this value, but does vary with loads)

If you left heating controls on for say a gas boiler, this will use some, not a lot, but some of course.
If you have an immersion heater, and this was left on, that will use a fair chunk.

Thank you for your quick reply.
Been looking around for ideas, Would I need to set up a schedule for my battery to discharge ,One person has
suggested.

Also do you think 8 to 10 kW a day is a lot to use with a Fridge/freezer, WIFI.tv on stand by
Regards
Dave

8-10 kWh usage for what you are saying was on, is fairly high. But it is hard to know if you had other things on using power, only if you was to investigate deeper would you know.


If you have 5 second refresh rate on your Fox App, then you could turn off circuit breakers and check the energy being pulled, until you discover the culprit.

8kWh a day represents around 333W of average load
10kWh a day represents around 417W of average load

Does your Fox App show this sort of loading for you?
Can you show a graph image for power for a full 24hr period?

does this help. we got home at 2.30am

You need to click on daily production bottom left, select a random full day for stats for when you was away.
Take a picture, then scroll down that page to Statistics at the bottom (press the square on right side to expand)

This will show full day load, and then the Statistics can show either a nice rough baseload, or spikes that need looking at.

attachments below I think

Both same
What was your Daily Consumption for the 14th?

You can probably see that your base load is low (click on 3am for example)
Then if you follow the Load value, it increases as your PV begins to generate.
Again, check say 9pm for house Load and check.

So click 3am, post Load value
Click 12pm, post Load value
Click 9pm, post Load value

So you have before solar load, during and after.
Suspect your Inverter is what is munching your load, increasing your Daily Consumption figures.

on the 14th load consumption was 8.80 from PV and battery 8.70

pv production was 37.20 load to battery 9.10

to the grid was 28.10

MaterialBarracuda48 wrote: ↑Thu Jul 16, 2026 12:25 pm So click 3am, post Load value
Click 12pm, post Load value
Click 9pm, post Load value

Can you find these values for the 14th from your graph you posted please?

on the 15th @ 3am 0.02

on the 15th @12pm 0.84

on the 15th @9pm 0.14
hope this makes sense to you.

just done a screen shot as of now.

Washing machine has been on 4 times today and the kettle.

perhaps im getting a bit paranoid.

davec wrote: ↑Thu Jul 16, 2026 1:44 pm on the 15th @ 3am 0.02

on the 15th @12pm 0.84

on the 15th @9pm 0.14
hope this makes sense to you.

The pattern I was seeing in your 24hr graph, looks like little to no load 00:00 - 06:00.

As the PV begins to generate, your load goes up, as your Inverter is now doing more conversion work, DC -> AC.
As seen by your higher consumption around 12pm

At around 9pm, as the PV is going/gone, your system settles down again.


You can multiply the kW by 1000 to get Watts of course.
on the 15th @ 3am 0.02 = 20W, this is very low... Inverter doing little to no work, and router
on the 15th @12pm 0.84 = 840W, Fridge freezer was maybe running, and some other things, Inverter is doing a bit of work also with that value (hard to say exactly what your house was doing at this time)
on the 15th @9pm 0.14 = 140W, looks around average for a fridge freezer working

I would recommend if you are heading away, to set your Battery max SoC to around 80%, leaving it at 100% for too long will damage the cells long term.


Just seen your recent post, I don't think you are being paranoid, but do look back over the week's logs to check for any big spikes. I think your Inverter was using a fair amount, but that's normal.

would you be able to tell how to set the battery to 80% if its easy to do.

my battery was set on
System min SOC is at 20% should it be at 80%

On your FoxCloud2.0 App, you have 'Quick Settings'
Then find your 'System SOC Range'

System Max. SOC = 80% (holiday mode, 100% otherwise)
System Min. SOC = 10% so that you get the most range of your battery (usable)
Off-grid Min. SOC = 10%

I have mine set as
100%
10%
10%

The first one is what you want to lower when going away for a few days.

thank you for your time today and your patience

Thanks again Dave.

davec wrote: ↑Thu Jul 16, 2026 3:55 pm thank you for your time today and your patience

Thanks again Dave.

You are most welcome Dave,

Here are some great videos made by Will
https://www.youtube.com/@iameccles/videos

In particular, this could be a good starting point for maximum battery life, it is recommended to discharge to 10% and up to 100% to 'exercise' the cells, helps them balance out (from time-to-time)



Enjoy the viewing, any questions fire away.