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Not sure if this is relevant, or not - What we do when we are charging our EV overnight is to set the Battery 'minimum SoC' to a higher value (e.g. 30%). This means that we use half battery draw and half grid until the battery get down to 30%. We only have a 3.7 Inverter.

First thing in the morning ...

Our smart meter includes the daily standing charge, so will always display a charge. Also, the Fox ESS Inverter usually draws a few Watts from the grid, just to monitor that the Grid is still functioning.

Hopefully, that helps

Hi Dave,

You are a superstar - Thank you very much.

Will give that a go.

Hope you had a great holiday
regards

Update - It looks like the setting is covered by the third item in the file 'Advanced-configuration.pdf' - available in the FoxESS downloads section of their website.

Have asked our installer to do the change (needs installer login and not user, by the looks of things).

Hoping that it works

Latest update....

DNO measured our voltage and reported that - Yes, it 'spikes' over 250v but is within limits and therefore will do nothing about it.

Our inverter has been tripped for 3 hours this morning.

No luck yet from FoxESS or our supplier on how to adjust the Inverter (H1-3.7-E) to trip ...

Update.....

Managed to get our DNO, SSEN, into action.

They will be installing a voltage monitor - to check the grid voltage. he recorded 244v this morning. However, the guy said that as we were reporting less than the maximum 253v - they might not do anything about it (the highest our Inverter ...

Hi Dave,
Thank you so much for your quick reply.
We will do as you suggested.
kind regards
Ian

Hoping for any advice,

We have a Fox H1 3.7Kw Inverter, 3x Fox ESS 4.03 batteries and 10x Trina Vertex 425W PV. Installed for about 4 weeks now.

All seems to be working fine - Apart from in the last few days, Our Inverter has stopped with the Error Code 28 - 10 Minute Average Grid Voltage Fault ...

Hi - Our App says the following (for Inverter H1-3.7-E and 3x4100 Batteries):-

Master Version - 1.37
Slave version - 1.02
Manager Version - 1.36

Hello everyone,

We have just had our System installed - 10x Trina Vertex 425W Panels, Fox ESS H1/3.7 inverter and 3x4100 Fox ESS Batteries.

Very happy so far, but so glad we found this forum, as it answered the problem we were seeing, where the Batteries were charging from the grid at 500W ...