Hey guys,

I just had a PV system installed at home and use a Sunsync 5kw inverter with 5000w of solar panels and a 10.1kw battery connected up to it.

Im confused about what to set on the Work Mode 1 page under the System settings section.

As far as possible id like to not charge the batteries from the grid but also like to set the batteries to not get low enough that the inverter shuts down (not sure if it will do this as I am connected to the grid as well), as well as wanting to supliment the power load from the battery if the solar isnt handling so as not to pull that excess power from the grid.

I have currently set the inverter to shut down at 10% battery and to restart at 25% if this makes any sense to do.

Refering to the attached settings page, if anyone has got some insite into this id appreciate it, its a bit confusing to me

Also I cant untick "Use time" for some reason as well, maybe thats not an option when you have a battery?

Edited December 12, 20213 yr by MakoShark

Mako, you need to set the work mode time to look something like this (ignore Power as I'm on a 5kw Deye system).

Basically the system is running on battery from 8pm in the evening to 8am in the morning. As soon as the sun comes up PV starts charging the battery and powering essentials.

Untick Grid Charge and tick Use Timer.

MdF

Edited December 12, 20213 yr by MdF

Thanks MDF, thats helpful!

For the Power feild is that inverter power or battery power? I assume inverter

Alo why wouldnt you want your batteries to go down lower than 40% SOC? In case of loadshedding?

38 minutes ago, MakoShark said:

Thanks MDF, thats helpful!

For the Power feild is that inverter power or battery power? I assume inverter

Alo why wouldnt you want your batteries to go down lower than 40% SOC? In case of loadshedding?

Yes, the power field is the capacity of your inverter. This refers to the maximum amount of power the inverter will output during each of those time session. I have kept mine below 5000w just to be safe the system doesn't overload.

Batteries were setup by the installer and he recommended not below 40% SoC. To be honest, we have not gone below 45% when running on batteries at night.

MdF

57 minutes ago, MdF said:

Yes, the power field is the capacity of your inverter. This refers to the maximum amount of power the inverter will output during each of those time session. I have kept mine below 5000w just to be safe the system doesn't overload.

Batteries were setup by the installer and he recommended not below 40% SoC. To be honest, we have not gone below 45% when running on batteries at night.

MdF

Thanks for the info! 

I tried to set mine lower than 25% for the battery but it's as low as it goes. 

I have set mine as below so hoping it's good. I assume these settings only have an affect if you have the grid on, if the grid is down the battery should go down to your shutdown %? 

Hi Mako, those settings look good. Give it a try for the next couple of days and see how it works out for you.

Yes, re there being no grid, the battery will proceed to set SoC and then shutdown.

1 hour ago, MdF said:

Hi Mako, those settings look good. Give it a try for the next couple of days and see how it works out for you.

Yes, re there being no grid, the battery will proceed to set SoC and then shutdown.

Awesome! Thanks for the help 

Any idea why I cant set my SOC lower than 25% on the work mode settings? Id like to be able to use it down to at least 20% if possible but it doesnt allow me

11 minutes ago, MakoShark said:

Any idea why I cant set my SOC lower than 25% on the work mode settings? Id like to be able to use it down to at least 20% if possible but it doesnt allow me

Check the battery page settings, its probably set to 25% on the Shutdown page so it won't allow it on the work mode to go lower than 25%

Edited December 15, 20213 yr by Leshen
...

7 minutes ago, Leshen said:

Check the battery page settings, its probably set to 25% on the Shutdown page so it won't allow it on the work mode to go lower than 25%

Nah I have it set to 10% for shutdown

1 hour ago, MakoShark said:

Nah I have it set to 10% for shutdown

And the rest?

25% for low battery and 25% for restart, I can try set them lower and test... Could be that 

1 minute ago, MakoShark said:

25% for low battery and 25% for restart, I can try set them lower and test... Could be that 

Yes it would be

Yeah it's that... Thanks! 

 

Was the low battery that did it... Not restart which I would have thought was the one 

Edited December 15, 20213 yr by MakoShark

5 minutes ago, MakoShark said:

Yeah it's that... Thanks! 

 

Was the low battery that did it... Not restart which I would have thought was the one 

Glad you came right

On 2021/12/12 at 8:25 AM, MakoShark said:

Hey guys,

I just had a PV system installed at home and use a Sunsync 5kw inverter with 5000w of solar panels and a 10.1kw battery connected up to it.

Im confused about what to set on the Work Mode 1 page under the System settings section.

As far as possible id like to not charge the batteries from the grid but also like to set the batteries to not get low enough that the inverter shuts down (not sure if it will do this as I am connected to the grid as well), as well as wanting to supliment the power load from the battery if the solar isnt handling so as not to pull that excess power from the grid.

I have currently set the inverter to shut down at 10% battery and to restart at 25% if this makes any sense to do.

Refering to the attached settings page, if anyone has got some insite into this id appreciate it, its a bit confusing to me

Also I cant untick "Use time" for some reason as well, maybe thats not an option when you have a battery?

 

You might find my post on this subject useful:
https://powerforum.co.za/topic/8896-sunsynk-8kw-no-output-on-load/#comment-112092

 

20 minutes ago, system32 said:

You might find my post on this subject useful:
https://powerforum.co.za/topic/8896-sunsynk-8kw-no-output-on-load/#comment-112092

 

Thanks will check it out 😀

I noticed my inverter had 2 ground points on it but my installer didn't ground it but ground the panels, is this correct or should the inverter also be grounded? I assume so as it has the points for it 

Also the inverter is rated to 5500w but set as max 5000w, can this be set higher safely or should it be left at 5000w

Edited December 16, 20213 yr by MakoShark

49 minutes ago, MakoShark said:

I noticed my inverter had 2 ground points on it but my installer didn't ground it but ground the panels, is this correct or should the inverter also be grounded? I assume so as it has the points for it 

Also the inverter is rated to 5500w but set as max 5000w, can this be set higher safely or should it be left at 5000w

The body of the inverter should be earthed. 

18 hours ago, Leshen said:

The body of the inverter should be earthed. 

Another thing my installer did wrong... 

The inverter is in my garage, I'm not sure what I should earth it to, does it need to be one of those rods in the ground? 

@MakoShark, as I understand it there are "3 different earths" at play ...

1. The PV panels should have that 1.2m copper rod as close as possible to the panles, preferably at a gutter downpipe where the ground is more likely to be wet
2. The inverter AC side should be earthed throught the municipal supply - no earth rod required, or is it?
3. Batteries must be earthed to the inverter (using the "small earth" as the installer called it)  

All three should be at 0V so I dont know why they are kept separate ... maybe someone with a better understanding of electricity can chime in?

Edit r.e. my last question ... the manual shows the chassis of the inverter must be earthed (to the municipla feed). This is the same earth that the batteries are connected to, so then only the PV panles has a seperate earth - probably to deflect lightning strikes.  

Edited December 17, 20213 yr by Scubadude

Thanks for the info!

Some answers \ info:

1. The PV panels should have that 1.2m copper rod as close as possible to the panles, preferably at a gutter downpipe where the ground is more likely to be wet - This was done
2. The inverter AC side should be earthed throught the municipal supply - no earth rod required, or is it? - Not sure if this was done \ required as you said
3. Batteries must be earthed to the inverter (using the "small earth" as the installer called it) - Not sure if this was done but will check

I see in the manual it says its mandatory to earth the inverter but mine definately doesnt have any wire connected to that currently

Has anyone set thier Synsynk 5kw to run at 5.5kw under work mode settings? Wondering if its safe to run it over 5kw or should it not be put under so much stress?

or is the max of the UPS output (essential loads) 5kw?

Never mind this setting is for the battery and not inverter... So how much battery power can be pulled 

3 hours ago, MakoShark said:

Never mind this setting is for the battery and not inverter... So how much battery power can be pulled 

That depends on your battery. What is the battery brand and model?