Hi all.
I have a sunsynk 5kw inverter.
How do I limit the feed from battery for non essentials like Geyser?
During the day the inverter will use 50% solar and 50% from grid.
But at night it uses 100% battery at 4200W, until the battery reaches the the set SOC level. 

Is there a setting to limit the battery to never feed, for example, at more than 2000W? I can't imagine that it is good for the battery to supply power at 4200W or more

55 minutes ago, JohanFourie said:

Hi all.
I have a sunsynk 5kw inverter.
How do I limit the feed from battery for non essentials like Geyser?
During the day the inverter will use 50% solar and 50% from grid.
But at night it uses 100% battery at 4200W, until the battery reaches the the set SOC level. 

Is there a setting to limit the battery to never feed, for example, at more than 2000W? I can't imagine that it is good for the battery to supply power at 4200W or more

On the Deye machine one can specify the Genport input as a Smart load.  It provides a couple of options in controlling the connected devices.  It will require you to connect the geyser to this port. This wil give you the control you need.  I am sure that a Sunsynk inverter would have the same option, but with different terminology and GUI. 

Edited August 6, 20232 yr by CobusK
Expanded on connection

17 hours ago, JohanFourie said:

Hi all.
I have a sunsynk 5kw inverter.
How do I limit the feed from battery for non essentials like Geyser?
During the day the inverter will use 50% solar and 50% from grid.
But at night it uses 100% battery at 4200W, until the battery reaches the the set SOC level. 

Is there a setting to limit the battery to never feed, for example, at more than 2000W? I can't imagine that it is good for the battery to supply power at 4200W or more

I had the same issue and solved it by setting the “Power” values on the System Mode - System1 screen to the maximum watt value I wanted for those times of day. Now during those times, non-essentials (like the geyser) only draw up to that value as a maximum, easing the strain on the battery.

 

Just note that during daytime this will limit solar as well since it acts as a grid-present inverter maximum which combines both battery and solar; so I use it only at night. EDIT: ZaydS mentions below that this doesn't impact PV at all - I've tested and he's right! - so it's safe to set throughout the whole day.

 

I’m also pretty sure that this could be done on the Battery Type screen by reducing “Discharge Amps”; but my understanding is that would affect grid-down (i.e. load shedding) as well which I didn’t want in my case.

Edited August 7, 20232 yr by JayMardern

4 hours ago, JayMardern said:

Just note that during daytime this will limit solar as well since it acts as a grid-present inverter maximum which combines both battery and solar; so I use it only at night.

I have a Sunsynk and it doesn’t limit PV. 

4 hours ago, JayMardern said:

but my understanding is that would affect grid-down (i.e. load shedding) as well which I didn’t want in my case.

Operates like UPS during load shedding. Limit is what’s set in battery settings/BMS. 

8 hours ago, JayMardern said:

I had the same issue and solved it by setting the “Power” values on the System Mode - System1 screen to the maximum watt value I wanted for those times of day. Now during those times, non-essentials (like the geyser) only draw up to that value as a maximum, easing the strain on the battery.

 

Just note that during daytime this will limit solar as well since it acts as a grid-present inverter maximum which combines both battery and solar; so I use it only at night.

 

I’m also pretty sure that this could be done on the Battery Type screen by reducing “Discharge Amps”; but my understanding is that would affect grid-down (i.e. load shedding) as well which I didn’t want in my case.

Awesome.  I was hoping that was what I could do.  I couldn't find anything on YouTube explaining that I can use it like that.  Great to hear that is possible.  Sure my BAttery will also be grateful 

3 hours ago, ZaydS said:

I have a Sunsynk and it doesn’t limit PV. 

Operates like UPS during load shedding. Limit is what’s set in battery settings/BMS. 

Thanks for the clarity.  All this helps to get the most out of the equipment you pay a lot of money for!

11 hours ago, CobusK said:

On the Deye machine one can specify the Genport input as a Smart load.  It provides a couple of options in controlling the connected devices.  It will require you to connect the geyser to this port. This wil give you the control you need.  I am sure that a Sunsynk inverter would have the same option, but with different terminology and GUI. 

Thanks.  I'll take a look at all the options on the app.  It's not always super clear what each setting does.  This will help a lot as starting point

7 hours ago, ZaydS said:

I have a Sunsynk and it doesn’t limit PV.

 

I stand corrected: I've tested this all day and you're 100% spot-on, the Power Limit is not an Inverter Limit but rather just a Battery Limit - which is even more perfect for OP's purposes. I've subsequently set my own limits during daytime as well; my battery sends its thanks to you for probably extending its life!

 

7 hours ago, ZaydS said:

Operates like UPS during load shedding. Limit is what’s set in battery settings/BMS. 

Yes exactly: I was referring to the “Discharge Amps” setting on the "Battery Type" screen which applies across the board (Grid Up + Grid Down) unlike Sytem Mode-System1 which is Grid-Up only if I'm not mistaken;

 

4 hours ago, JohanFourie said:

Awesome.  I was hoping that was what I could do.  I couldn't find anything on YouTube explaining that I can use it like that.  Great to hear that is possible.  Sure my BAttery will also be grateful 

 

Yeah it's perfect for your scenario; and as @ZaydS mentions, there's no harm in having it specified throughout the day since it doesn't impact PV/solar production.

 

 

 

So to confirm, it's loadshedding and there's need for more power from the battery alone than the amount set, will the inverter trip or just draw it anyway?

Referring to the "power" setting in the time of use menu.

10 minutes ago, solazzz said:

So to confirm, it's loadshedding and there's need for more power from the battery alone than the amount set, will the inverter trip or just draw it anyway?

Referring to the "power" setting in the time of use menu.

I understood the power setting was just the rate of battery discharge to the non essential when there is grid. 

When LS then it has no affect but the % SOC will be followed as per the timer settings. 

 

Ah ok, then I misunderstood.

I was looking for a setting to set battery discharge lower (say 100A or 5kw), but when there's no grid/solar then up to the max (say 150A or 7.5kw) is fine.

At the moment I have the max discharge set to 150A but when there's grid then I would prefer it just discharge 100A and fetch the rest from grid. Not a big deal as this hardly happens and doesn't last long but just feels healthier for the battery.

2 hours ago, solazzz said:

So to confirm, it's loadshedding and there's need for more power from the battery alone than the amount set, will the inverter trip or just draw it anyway?

Referring to the "power" setting in the time of use menu.

 

2 hours ago, Scorp007 said:

I understood the power setting was just the rate of battery discharge to the non essential when there is grid. 

When LS then it has no affect but the % SOC will be followed as per the timer settings. 

 

The inverter will cover the scenario @solazzz describes:

Under all circumstances, the “Discharge Amps” specified in the Battery Setup screen will govern maximum battery draw. 
 

When the grid is up, the Power stipulated for that time slot in System Mode- System1 (as long as it’s lower than “Discharge Amps”) takes priority. So the battery will be discharged at a maximum of the watt value stipulated there; but capped at the Discharge Amps. 
 

Likewise the SOC % values per timeslot are only adhered to if there’s grid at that time.
 

When the grid goes down, the timeslot values in System1 fall away and the only limit is Discharge Amps, and the Battery Setup “ShutDown” percentage; which will power the output down at that percentage, and trip the inverter above Discharge Amps.
 

This means that you can go easy on the battery when the grid is up and harder when the grid goes down. I’ve set mine to do this, with an 80A (around 4kW) limit in grid-down, but just 2.7kW when there’s grid.

That is great, will give it a test this week

15 hours ago, JayMardern said:

 

The inverter will cover the scenario @solazzz describes:

Under all circumstances, the “Discharge Amps” specified in the Battery Setup screen will govern maximum battery draw. 
 

When the grid is up, the Power stipulated for that time slot in System Mode- System1 (as long as it’s lower than “Discharge Amps”) takes priority. So the battery will be discharged at a maximum of the watt value stipulated there; but capped at the Discharge Amps. 
 

Likewise the SOC % values per timeslot are only adhered to if there’s grid at that time.
 

When the grid goes down, the timeslot values in System1 fall away and the only limit is Discharge Amps, and the Battery Setup “ShutDown” percentage; which will power the output down at that percentage, and trip the inverter above Discharge Amps.
 

This means that you can go easy on the battery when the grid is up and harder when the grid goes down. I’ve set mine to do this, with an 80A (around 4kW) limit in grid-down, but just 2.7kW when there’s grid.

Thanks for this detail. I am sure it will serve a lot of members very well. We all have to learn these options as things can just get worse and own management will be very important. 

Part of my essential management is I tie my backup use based on LS. If after 22h at night only my electric blanket uses battery power and only for the time slot that we have LS. Other hours it runs on the grid via a grid monitor.