37 minutes ago, biometrics said:

I don't have solar panels but I found this option: Inverter/Inverter Control/Storage Mode/Charge&Discharge Slot and I enabled Slot 1. Let's see if this makes a difference. If this it then it's a pretty well hidden option!

You also need to set the charge times (start and stop) - I see your image still shown it as from 00:00 to 00:00... that won't work until you set a charging time (e.g. 00:00 start to 18:00 stop). Without any PV you should obviously choose a low rate grid period, something like 00:00 to 05:00. Also try to confirm if the "SOC1" % means that the charging will start once the battery discharges to 50% SOC, or that the charging will stop at 50% SOC - perhaps someone on this Forum that actually own a Solis can confirm that... Calling @Pho3niX90

Edited April 7Apr 7 by HennieL
Typo corrected

The soc is the desired end SOC.

If the battery is just there for backup, it's best to enable battery reserve switch, at a 100% soc.

A screenshot of the storage mode screen would probably give good insight.

1 hour ago, HennieL said:

You also need to set the charge times (start and stop) - I see your image still shown it as from 00:00 to 00:00... that won't work until you set a charging time (e.g. 00:00 start to 18:00 stop). Without any PV you should obviously choose a low rate grid period, something like 00:00 to 05:00. Also try to confirm if the "SOC1" % means that the charging will start once the battery discharges to 50% SOC, or that the charging will stop at 50% SOC - perhaps someone on this Forum that actually own a Solis can confirm that... Calling @Pho3niX90

4 minutes ago, Pho3niX90 said:

The soc is the desired end SOC.

If the battery is just there for backup, it's best to enable battery reserve switch, at a 100% soc.

A screenshot of the storage mode screen would probably give good insight.

Like so?

46 minutes ago, biometrics said:

Like so?

Jip.

Remember the screenshot of the storage mode screen

3 minutes ago, Pho3niX90 said:

Jip.

Remember the screenshot of the storage mode screen

1 minute ago, biometrics said:

Bat reserved needs to be 100%, if this battery is meant for backups. 20% actually makes no sense for this mode.

2 minutes ago, Pho3niX90 said:

Bat reserved needs to be 100%, if this battery is meant for backups. 20% actually makes no sense for this mode.

Currently no solar panels so yes it's for backup.

1 minute ago, biometrics said:

Currently no solar panels so yes it's for backup.

Please test the new settings and let us know.

The only other settings to change is not available for owner accounts, but installer accounts.

Just now, Pho3niX90 said:

Please test the new settings and let us know.

The only other settings to change is not available for owner accounts, but installer accounts.

Thanks very much. Will feedback with the next power failure (don't hold your breath).

7 hours ago, biometrics said:

Thanks very much. Will feedback with the next power failure (don't hold your breath).

Way wait - simply switch off your grid power for a few hours, let the battery drop to (say) 70%, then switch the grid back on and observe the charging amps. Given that you will be charging from the grid in any case, you could do this in the late afternoon/early evening when you're at home to observe.

7 hours ago, biometrics said:

Currently no solar panels so yes it's for backup.

I'm a great fan of not discharging batteries deeply unless absolutely necessary (i.e. grid failure), but I also believe that keeping a lithium ion battery fully charged (at 100%) for long periods will negatively affect it's service life. Given that you have a number of charge and discharge time slots available, I would consider partially discharging the battery every day - say down to 70% SOC. If you have varying grid cost rates (i.e. a very expensive peak time rate and a much lower off-peak rate), you could set the system to discharge during the high-rate periods and charge fully again during the off-peak periods - this is known as "grid shaving", feel free to Google this term for more info.

Edited April 8Apr 8 by HennieL

10 hours ago, HennieL said:

Way wait - simply switch off your grid power for a few hours, let the battery drop to (say) 70%, then switch the grid back on and observe the charging amps. Given that you will be charging from the grid in any case, you could do this in the late afternoon/early evening when you're at home to observe.

I'm a great fan of not discharging batteries deeply unless absolutely necessary (i.e. grid failure), but I also believe that keeping a lithium ion battery fully charged (at 100%) for long periods will negatively affect it's service life. Given that you have a number of charge and discharge time slots available, I would consider partially discharging the battery every day - say down to 70% SOC. If you have varying grid cost rates (i.e. a very expensive peak time rate and a much lower off-peak rate), you could set the system to discharge during the high-rate periods and charge fully again during the off-peak periods - this is known as "grid shaving", feel free to Google this term for more info.

Yay, it’s working! Thank you @Pho3niX90 and everyone that commented. Much appreciated. A bit sad that Solis SA support said it’s a battery issue and they can’t help.

Will get solar panels this year and will then set it to use down to 40% SOC overnight. Don’t want to go lower in case of outages or lack of sun.

Edited April 8Apr 8 by biometrics

11 minutes ago, biometrics said:

Yay, it’s working! Thank you @Pho3niX90 and everyone that commented. Much appreciated. A bit sad that Solis SA support said it’s a battery issue and they can’t help.

It's a pleasure - always great if we can solve a problem... And I'm really glad that we could solve your problem 😁

I suppose the Solis support technician made the same wrong assumption that most of the earlier responders to this thread made - that of assuming that the system had been commissioned correctly, and that the user is familiar with the settings - so don't be too hard on Solis support...

It was only after I noticed your low post count, and in your response to my request for more information when you mentioned that the system was installed only six months ago, and only experienced this problem twice (both times after grid power failures depleted the battery) that I put two and two together and wondered if your inverter settings were actually set up correctly... Just goes to confirm again that one can only expect positive assistance if one provides sufficient information...