SunSynk load schedules - and pulling from the grid...

[Mzezman]

Shot in that dark, do you have Grid peak shaving turned on?

 

[shadow_man]

Shot in that dark, do you have Grid peak shaving turned on?

Nope.

 

[shadow_man]

I don't recall, isn't there also a setting where you can configure the system to prioritize charging battery over other things?

Yep priority load or priority battery. I always prioritize load then what’s left goes to battery.

 

[SauRoNZA]

I don't recall, isn't there also a setting where you can configure the system to prioritize charging battery over other things?

Yeah but even then it would only prioritise up to the set SOC and not beyond that.

And still wouldn’t use grid if disabled.

 

[shadow_man]

AND we're back to this magically breaking itself.

Only things that changed:

1.) On the weekend I set 2x 95% SOC slots due to bad weather, once battery had charged I reverted them back to 25% - this ran fine for the following (this) week.
2.) I had a sparky install geyser timers last night - and for this the mains were dropped for a few minutes.
3.) Looking at the graph the grid usage seems to coincide with this drop / the mains coming back up (coincidence?)

I'm getting kind of annoyed at this level of inverter malfunction as it's costing me money. At this point I'm considering just leaving the mains tripped (I would if it were summer as I'd generate far more than I need)...

 

[AchmatK]

Firmware update done by Sunsynk - still the same issue.

@AchmatK tagging you here in case you have any input (fine if you don't, just saw an old post of yours on PowerForum discussing the topic).

How long has this system been in use? Had it worked before?

Share some of your other battery setting and inverter setting pages.

If your battery is at 90% then it should use the solar to supply loads.

Edit

Only saw this post now. Seems MyBB tagging is not working as it should. Didn't receive any notification on my phone when you tagged me.

 

[shadow_man]

How long has this system been in use? Had it worked before?

Share some of your other battery setting and inverter setting pages.

If your battery is at 90% then it should use the solar to supply loads.

4 months - and yes, very smoothly.

Firmware update didn't fix --> factory reset did.

It started randomly malfunctioning shortly before I started this thread - and yes it should be using PV and not the grid right now.

It's just stopped working again now. It SHOULD NOT be pulling from the grid unless SOC drops to 25% or below - not on the 90 odd% it's trying to now (for ref the last tweak I did to SOC was 95% last weekend, so I wonder if that's somehow remembering that).

 

[Mzezman]

I'm struggling to comprehend the issue... morning and all that - probably not you, but could you elaborate what the issue is here?

Issue is at 6:35pm, when SOC is 97%, he wants the system to pull the load from batteries, but the system is pulling from grid (load is approx 600w). His time of use settings seem fine but something is not working

 

[zeb]

What happens if you disable the Grid Charge time slots? Not Time Of Use, just the 6 underneath that.

 

[shadow_man]

What happens if you disable the Grid Charge time slots? Not Time Of Use, just the 6 underneath that.

I’ve done that per time slot, disabled time of use and adjusted soc AND a firmware update. NOTHING works until I do a factory reset (and then in this case it’s fine for a week or two, then breaks randomly…)

 

[Speedster]

Not sure if this has been checked - but what is your max discharge rate set at? I'm not too familiar with the SunSynk menus (I have a Deye), but it should be somewhere under battery settings.

 

[TedLasso]

I’ve done that per time slot, disabled time of use and adjusted soc AND a firmware update. NOTHING works until I do a factory reset (and then in this case it’s fine for a week or two, then breaks randomly…)

I am certain I experienced the same last week (in the first few days of inverter use). Grid was ticked (but my SoC was 100%) and in my case PV refused to charge the battery, even where there was enough capacity to charge the battery.

Now Grid is unticked on all of them (see my thread on my install with all my questions) and the SoC is 20 for all slots. Having done this, the system is now working and using all spare capacity to charge battery and if load is too high, then also takes from battery but not grid

This is what it's doing right now (solar assistant stats) since it looks like my Sunsynk Logger went offline about an hour ago.


When we had load shedding last night scheduled for 8pm - I set the Grid Charge on and 70% SoC for 6pm slot and the inverter did what it needed to do. This is the history for yesterday to today (right now)



So I would recommend that 1 :-

1. Turn of grid charge on all slots and see what happens (assuming your setting is load priority) and timer is set.
2. Wait 30 mins and see what happens
3. Then drop your SoC to 50% for all slots and see what happens

I also suspect the app may be corrupting data sent to the inverter if you make changes via the app (just a thought) <- So do the above on the inverter itself - as a form of another test.

 

[shadow_man]

Not sure if this has been checked - but what is your max discharge rate set at? I'm not too familiar with the SunSynk menus (I have a Deye), but it should be somewhere under battery settings.

 

[shadow_man]

I am certain I experienced the same last week (in the first few days of inverter use). Grid was ticked (but my SoC was 100%) and in my case PV refused to charge the battery, even where there was enough capacity to charge the battery.

Now Grid is unticked on all of them (see my thread on my install with all my questions) and the SoC is 20 for all slots. Having done this, the system is now working and using all spare capacity to charge battery and if load is too high, then also takes from battery but not grid

This is what it's doing right now (solar assistant stats) since it looks like my Sunsynk Logger went offline about an hour ago.
View attachment 1351902

When we had load shedding last night scheduled for 8pm - I set the Grid Charge on and 70% SoC for 6pm slot and the inverter did what it needed to do. This is the history for yesterday to today (right now)

View attachment 1351904

So I would recommend that 1 :-

1. Turn of grid charge on all slots and see what happens (assuming your setting is load priority) and timer is set.
2. Wait 30 mins and see what happens
3. Then drop your SoC to 50% for all slots and see what happens

I also suspect the app may be corrupting data sent to the inverter if you make changes via the app (just a thought) <- So do the above on the inverter itself - as a form of another test.

Thanks - i've done all of this several times. I KNOW how it should work. It works as it should for a time, but then breaks - once you've had to change the SOC once or twice for bad weather or severe load shedding.

I can reset it --> use exact same settings --> and it works. It will just randomly break at some point.

SunSynk support out of India are next level useless.

They keep asking for the same settings over and over again - and i'm about to just pull a warranty claim and swap it for another brand. As at this point it's costing me money, as it keeps trying to use the grid whenever it damn well feels like.

 

[AchmatK]

Can you take pic of the second system mode screen.

 

[Speedster]

@shadow_man those battery settings look correct (remembering the only ones that matter are lithium). Something else I noted, assuming you have an earth/neutral bond set up for islanding mode, "signal island mode" should probably be on.

 

[shadow_man]

Can you take pic of the second system mode screen.

 

[AchmatK]

I'll try and assist when I get home but from these screens you should be using the battery instead of grid. Only excess pv should go to charging after supplying loads

 

[shadow_man]

I'll try and assist when I get home but from these screens you should be using the battery instead of grid. Only excess pv should go to charging after supplying loads

Correct - I'm lucky enough to have some arb software bug. I'm not lying when I say I can factory reset the inverter --> RE-USE THE SAME SETTINGS --> and it will work as intended...

The only problem is getting SunSynk support to give a rats ass

 

[AchmatK]

Correct - I'm lucky enough to have some arb software bug. I'm not lying when I say I can factory reset the inverter --> RE-USE THE SAME SETTINGS --> and it will work as intended...

The only problem is getting SunSynk support to give a rats ass

Maybe request a specific software version.

Some of my screens and software version.