Luxpower SNA5000 Issue

Mav86Mike

Mav86Mike

Active Member
Joined
May 25, 2023
Messages
33
Reaction score
12
Location
Port Elizabeth
Morning all

As the title says, I have an issue with my install and hoping someone can assist? I have a Luxpower SNA5000 and 1x Dyness BX51100 Battery. Working fine during loadshedding, and also when power is on. When selecting the "PV&AC Take Load Jointly" option something weird happens with my incoming/eskom supply. Everything running on the inverter works 100%, for some reason my eskom supply shuts off, so no supply to inverter, or anything connected from DB (AC Supply). It keeps shutting down my AC supply without tripping any breakers on my main DB. I checked that I do have incoming AC, but not goint to my appliances. This only happens on the joint load function. I also have deselected the export so that cant be an issue. I really hope I can fix this as Im wasting my solar panels and only using AC for loads at the moment.
 
Grid feeding trips prepaid meter

So i would check that the CT coil is working/connected properly

As that is what it uses to calculate blending
When it is blending the source and he output is linked so if it
It determines ratio incorrectly

It may push to grid

If there is a minimum flow like the sunsynk has ie the 20w then you can also try make that higher until the problem disappears
 
leon.davibe said:
Grid feeding trips prepaid meter

So i would check that the CT coil is working/connected properly

As that is what it uses to calculate blending
When it is blending the source and he output is linked so if it
It determines ratio incorrectly

It may push to grid

If there is a minimum flow like the sunsynk has ie the 20w then you can also try make that higher until the problem disappears
Click to expand...
Forgive me but I have no idea what a CT coil is? Isnt the Luxpower a sealed unit? Where can I check?
 
CT Coil
Mav86Mike said:
Forgive me but I have no idea what a CT coil is? Isnt the Luxpower a sealed unit? Where can I check?
Click to expand...

CT Coil should have been installed between your Inverter and the Grid which is there to measure the flow of power both in and out and what ultimately controls it.

www.sunsynk.org

Using a CT Coil

Basic understanding of using a CT coil it is used to control the export or import of the power from the grid this is very important and care must be taken when using CT, to ensure it is wired correctly Note Black is NEUTRAL
www.sunsynk.org www.sunsynk.org

Called a CT Clamp in Luxpower speak it seems.

luxpowertek.com

Luxpower inverter CT Clamp -

Specification
luxpowertek.com luxpowertek.com
 
SNA5000 does not have a CT Coil only the larger LxP one has one. Also check that the Export to Grid setting is disabled and the Export power is set to 0%

IMG_5412.jpg
 
Mzezman said:
SNA5000 does not have a CT Coil only the larger LxP one has one. Also check that the Export to Grid setting is disabled and the Export power is set to 0%

View attachment 1635971
Click to expand...

Wouldn't that mean it can't be approved for a solar installation?

(At least not in Cape Town anyway)

Is it one of those "off grid" inverters and not truly hybrid then?
 
SauRoNZA said:
Wouldn't that mean it can't be approved for a solar installation?

(At least not in Cape Town anyway)

Is it one of those "off grid" inverters and not truly hybrid then?
Click to expand...
I know CPT is stricter - and i am not sure if its on their new approved list. I think it uses some software / internal magic to restrict backflow vs the full hybrid LXP which has an external CT and is on the CPT list
 
The SNA5000 is Cape Town City approved. Also as mentioned Export has been disabled. According to Luxpower SA you dont need a CT Clamp if you not exporting. They are busy setting up my system remotely at the moment. Lets see what the outcome is
 
Mav86Mike said:
The SNA5000 is Cape Town City approved. Also as mentioned Export has been disabled. According to Luxpower SA you dont need a CT Clamp if you not exporting. They are busy setting up my system remotely at the moment. Lets see what the outcome is
Click to expand...
But without a CT coil it is impossible to manage your non-essentials (those circuits not connected to the inverter). With inverters equipped with a CT coil you can power those circuits using excess from solar or your battery.

Here is an example :
1703064025111.png
 
Stonemason said:
But without a CT coil it is impossible to manage your non-essentials (those circuits not connected to the inverter). With inverters equipped with a CT coil you can power those circuits using excess from solar or your battery.

Here is an example :
View attachment 1636003
Click to expand...

Exactly my thinking, what he wants to do is having non-essentials running from excess solar which can only happen with a CT Coil or some other trick of measuring the excess.
 
So there will be a setting in your SNA inverter that speaks to Power Offset. This figure needs to be tweaked based on solar power coming back to your meter (see comment below where i highlighted the blue ?). Your meter thinks it is being tampered with so it shuts down. You need to see the value hitting your meter in watts and put that value into this field.

I don't you will have access to this item as a user. You might need an installer account.

There is good information here ... https://powerforum.co.za/topic/2520...-meter-going-into-tamper-mode/#comment-190918


1703077390098.png
 
SauRoNZA said:
Wouldn't that mean it can't be approved for a solar installation?

(At least not in Cape Town anyway)

Is it one of those "off grid" inverters and not truly hybrid then?
Click to expand...
If it isn't proper hybrid it won't be able to trip prepaid meter
 
The SNA is a hybrid "light". You can enable PV&AC take load jointly and also enable export to grid.

1703085113049.png
 
If there is no way to measure to ensure only to export enough for load (CT clamp/coil) , then maybe having load that exceeds max possible PV. Or if a person can say battery charging takes priority then the export amount would be less , thus less likely to exceed load and trip the meter
 
Daft did not suggest this

Put all your load on the inverter, geysers everything
(Naturally not exceeding the cable carrying capacity they used to and from inverter)

The inverter will then blend ie whatever the solar can't carry

It will blend eskom to make up the difference

You will then have to play around with the settings regarding battery , ie so the inverter blends solar/battery/eskom in a way where you always have the amount of reserve battery you need as a minimum ie the value in which it stops using battery power for blending and only uses eskom in addition to pv

No clue about luxpower menu /operation

Would look at charge time setting and to grid voltage

Edit without a CT setup as some say this model does not have that feature , this is the only way to use the blend ability to make the savings as high as possible
 
Last edited:
Sorry for the delayed response.

I had excellent backup tech service from Luxpower right after I posted here. They accessed my inverter remotely via wifi, and changed a few settings to make it work. System now works as intended, and only uses eskom power if the panels cant provide enough power. Menu setting 23, CT offset can be set to make this feature work.
 
Not really an issue but related to the SNA5000.

Turns out my box never came with the CAN cable for Pylontech (according to their site it should have).

Anyone that has made up a cable before and can give some guidance?

Tx
 
acidrain said:
Not really an issue but related to the SNA5000.

Turns out my box never came with the CAN cable for Pylontech (according to their site it should have).

Anyone that has made up a cable before and can give some guidance?

Tx
Click to expand...

yeah its easy peasy, do you have the blue dip switches or the red dip switches on the inverter next to the can and rs ports?

edit: either way here is the info you need: https://powerforum.co.za/topic/13672-luxpower-inverter-battery-compatibility/ look at the 8th post
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X