Solis inverter settings

Hijacking this thread if that’s ok. My battery discharges to 0% every night. I presume this is not great for the battery. Does anyone know where I can find the setting in a Solis inverter to tell the battery not to discharge fully?

Well this should not be the case if battery and inverter communicate properly and the settings are correct.

What battery are you using? The below instructions are only if the battery manufacture is supported by inverter.

Go to Advanced Settings>Battery Select>Choose the battery that you have>set OverDischg SOC, this should not be less than battery DOD(20% is safe bet)>Set ForceCharge SOC, this is to prevent battery discharge, if it drops below set value it will force charge from grid(if SOC is 20% then set this to 15%) and that should be it.

If you do not find the battery in the list then do not just pick any. You need to check battery settings in the manual and set them accordingly. It could be that your battery is not in the list and the settings are configured are incorrect at the moment and this leads to full discharge. If settings are correct then it could be a problem with battery.

Thanks. It’s a PylonTech battery. The SOC was set to 20% but the FOC was set to 10% so I’ve upped that to 15% and we’ll see what happens.

There is something wrong. Even with 10% FOC inverter should not allow the battery to go below 10%. Does you battery powers off when it goes to 0% and you have to power it on manually as Pylons have trip voltage of 48V when they shutdown? Are there any alarms in the inverter? Where do you see 0%? Is it on inverter? Can you connect battery to laptop to check logs? You just need rs232(serial on laptop) or rs485. This would allow to check battery itself and diagnose. It could still be a problem with communication problem between battery and inverter.

So not sure why it made a difference in the end but since upping the FOC to 15% everything has run smoothly. No more alarms/alerts. Now to figure out peak shaving.

Start with the manual as this is what mine says:

Also you can ask Solis support https://solis-service.solisinverters.com/support/home and then share your findings here :)

I just added another 2.4 pylontech but this morning the pair were only being charged at 180w rate. same thing happened before (only 1 battery then) when I edited and saved the battery storage Time of Use settings in the Solis inverter, a full shutdown and start up sorted it that time.. anyone know why this happens?

thanks a mil, hadn't thought of selecting the battery again, will try it tomorrow if the system recycle today didn't do the trick (charging on night rate tonight)

I have a Solis 6kwh hybrid 5G and you should have seen the Reserve SOC value as soon as you clicked Backup mode like this:

Maybe you have different generation/firmware?

I have self use on, then the choice of time of use or charging from grid.

If i want this to stop charging at the times i have set for winter - then i change run to stop.

But maybe you have a different model or firmware to me.

@KeRbDoG what exactly is the issue you are seeing?

So what i've seen is that any excess solar the house doesn't need, is being exported and not being pushed into the battery pack.

I've selected 'Self Use' and the above are the timings - am I missing anything silly?

Do i need to go into 'Backup' and ensure that is switched 'off' also?

OK, do I put the charge time to 00:01 - 23:59 or no need?

Right now I just want the batteries to take any excess solar during the day and feed that back to the house whenever there is demand. Not using night rate (yet).

Unfortunately the unit doesn't allow that - 'save&send' comes back with 'failed' :(

Set the charge time as above midnight to 8am. Set discharge to 00 00 and save. Make sure itsset to stop.Thenyou should get that you need.