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2 Deye SUN-10K-SG04LP3-EU in parallel

obus

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Hi guys.
Newbie here on the forum so have patience with my ignorance. I have two Deye SUN-10K-SG04LP3-EU mounted and for the moment working well in single mode without batteries. The idea is to connect them in parallel with two wall mounted batteries later on when I can afford to buy the batteries.
My question is if there is a way to parallel connect my two inverters already now without the battery. I can set the inverters in parallel but as soon as I have the parallel communication working my second inverter (slave) changes from No Battery mode to Use Batt V mode and as a result of this the F56 fault "DC busbar voltage is to low". I presume this is because the inverter is thinking there should be a battery connected.
Any ideas?
 
Hi guys.
Newbie here on the forum so have patience with my ignorance. I have two Deye SUN-10K-SG04LP3-EU mounted and for the moment working well in single mode without batteries. The idea is to connect them in parallel with two wall mounted batteries later on when I can afford to buy the batteries.
My question is if there is a way to parallel connect my two inverters already now without the battery. I can set the inverters in parallel but as soon as I have the parallel communication working my second inverter (slave) changes from No Battery mode to Use Batt V mode and as a result of this the F56 fault "DC busbar voltage is to low". I presume this is because the inverter is thinking there should be a battery connected.
Any ideas?
you CANNOT parallel these inverters without a battery..
full stop.
this is also very clearly in the manual.

what you can do is run them individually as grid-tie inverters
 
I suspected that but c couldn't find anything in the manual myself. Could you please tell me where I can find that information in the manual. (which page)
Thank's for your prompt answer.
 
in my manual it is on page 52-53..
but i have the sunsynk version of the inverters/manual
 
The Deye manual is really poor. There is nothing about this in my latest manual from 2023-03-28.
Anyway thank's for your help.
 
The Deye manual is really poor. There is nothing about this in my latest manual from 2023-03-28.
Anyway thank's for your help.
sorry to hear this ..
maybe if the manual is really poor, you could look at sunsynk's youtube channel..
they have complete installer courses on it..
should help you a lot with the "little things" in setting these inverters up in the best possible way for your situation
 
Wonder if it's possible to flash the SYNK-10K-SG04LP3 firmware on the Deye SUN-10K-SG04LP3-EU inverter. It looks like exactly the same stuff?
 
It IS in your manual. Also in the schema for paralleling units, dont remember which page.
I think you asked this same questions in the Deye user group on FB, amiright?

Batteries ARE necessary for paralleling units - Deye (in the manual) suggest 200ah per inverter.
ONE battery bank to be shared among the units. Keep the batt cables exactly the same length.
 
Wonder if it's possible to flash the SYNK-10K-SG04LP3 firmware on the Deye SUN-10K-SG04LP3-EU inverter. It looks like exactly the same stuff?

The hardware is supposed to be exactly the same yes.
That said...I wouldn't do it. Stick to the Deye software.
Personal point of view: Sunsynk looks like it's created by a indian or pakistani with a love of MANY colors... (yeah, yeah I know, IMO) it doesn't exactly inspire more confidence IMO.
 
Hi again guys new question about batteries.
I've just bought two Sunway SW51B200T wall-mounted batteries. According to Deye's manual Batteries should be connected like this: Sketch_1.jpeg

The culprit for me is that this way of connection will give me problem with equal cable length to DC breakers/Iinverters for preventing unbalanced charge/discharge. My question is if it's possible to instead connect the batteries according to my very very ordinary sketch here:Sketch_2.jpeg
I found this video from Keith on SunSynk jus as a curiosity. It seems he used this way to connect the SunSynk BYD batteries.
.

Any help appreciated!
 
no, for paralleled inverters, both inverters need to be connected to exactly the same battery bank..

use a busbar, and make sure cable to inverters are the exact length..

pos and neg from battery to busbar are of less importance to be same length..
 
no, for paralleled inverters, both inverters need to be connected to exactly the same battery bank..

use a busbar, and make sure cable to inverters are the exact length..

pos and neg from battery to busbar are of less importance to be same length..
Ok I understand and I supposed it to be like that.
Is it ok to use the DC breaker as busbar like this?IMG_0756.jpeg
 
have about the same breakers , and it should work, but it aint pretty, and give the origines of these breakers, i'd spend a little on an aluminium or copper bar
This is a soloution for the moment. Have no busbar at home so I need to order one from Amazon. Thank's for your prompt answer.
 
This is a soloution for the moment. Have no busbar at home so I need to order one from Amazon. Thank's for your prompt answer.
a piece of copper/aluminium can be picked up at your local hw store pretty easily..
drill some holes, tap and you're golden
 
you CANNOT parallel these inverters without a battery..
full stop.
this is also very clearly in the manual.

what you can do is run them individually as grid-tie inverters
Newbie question here, what are the pros and cons for both running them individually in a micro-grid vs parallel connection. Also do you know why parallel connected inverters should run on a single battery bank. On SG04LP3-EU manual apart from parallel connection diagram I could not find information that separated batteries are not allowed. I was checking the SG01HP3-EU-AM2 manual also and there it is stated that:
Note: unlike cases of other hybrid inverter with LV battery, HV battery can only be connected separately to HV hybrid inverters.
Does this mean that with LV battery inverter both separated and single battery banks can be used ?
 
Newbie question here, what are the pros and cons for both running them individually in a micro-grid vs parallel connection.
Load sharing, redundancy
Also do you know why parallel connected inverters should run on a single battery bank.
The deye based inverters use a common battery bank to synchronize to eachother
On SG04LP3-EU manual apart from parallel connection diagram I could not find information that separated batteries are not allowed.
I would read again
I was checking the SG01HP3-EU-AM2 manual also and there it is stated that:
Completely different inverter
Does this mean that with LV battery inverter both separated and single battery banks can be used ?
For the SG04LP3-EU certainly not
 

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