PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

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Roman khan
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by Roman khan »

Hi i hope all of you will be fine.
My vmii 3kw inverter has a problem it could not starts by turning ON the on-off button, it starts when i turn on and off button several times.i replace the on-off button but the problem is still exists.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

Roman khan wrote: Wed, 22 Jan 2020, 00:14 Hi i hope all of you will be fine.
My vmii 3kw inverter has a problem it could not starts by turning ON the on-off button, it starts when i turn on and off button several times.i replace the on-off button but the problem is still exists.
That sounds like a minor hardware problem. If you are handy with electronics, there are only a handful of parts that could be involved.

Assuming that the part numbers are the same as for the PIP-4048MS model (they do seem to retain part numbers across models, fortunately), referring to this partial schematic trace, the relevant parts starting with the most likely are
  • C7 (could be leaky or low value)
  • R258, R262, R256, R257, R259 (involved in charging and discharging C7)
  • Q9, (could be low gain or intermittent).
  • U13 (If the diode is shorted, this will affect the discharge time).
If you're not handy with electronics, or know anyone who is, then you'll have to get the board repaired. I suggest trying to find someone local who can understand the above; getting the inverter repaired through your supplier will likely be painfully slow, and they will replace the entire main board, which will cost at least half the cost of the inverter itself. All the parts listed above come to about 1 AU$, and the repair should cost very roughly an hour of labour.

[ Edit: had R259 down twice. Spelling. ]
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by ojeysky »

Hello,

I got a 24v 5.4kwh (25.6v nominal) LFP. I am trying to figure out a charging algorithm on the GK series since there is no settings for lithium on the CC. Attached is my current settings, I like to know if this is okay or whether I should change some of the settings to something else.

Thanks
Edit: I have gone through the previous posts and updated my settings accordingly. The other question now is the cut-off voltage, is there a workaround to increase that beyond 24v? I have 3.2v cells in 8s2p. What will be the SOC of the battery @24v?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by ojeysky »

mufaddalk wrote: Mon, 12 Aug 2019, 19:16 Hi, first time posting, i have a PIP5048GK, i have been reading through the forums trying to grasp as much i can understand. Still not sure how to setup the inverter with the best config and would like your help.

PIP5048GK inverter is recent model (04 2019) I have checked that its not a clone. I have 16 CALB 100ah batteries in series. I have 11 x 185W panels connected in series which gives max 420Vdc. For the software i am using watch power connected via Bluetooth at the moment. I also have connected my grid power to utility.

I have set them up with 56V as Bulk and 54.2V as float. Based on reading this forum the inverter has the float bug. I find it giving 54.2V all the time which is not charging the battery and the battery slowly drains. If i set the float to 56V i can see the battery charging.

So my question is

1. for the batteries i am using what is the optimum bulk and float and any other settings i should set considering the fact that it has the float bug. Also would like advice on back to grid (my settings is 51V) and back to discharge voltage (my settings 53V). Unfortunately i cant change my battery cut off voltage which is set at 48V. I would like to be conservative with my settings, not charge too high to preserve battery life.

2. Can someone explain battery equalization settings, if it can be set for this inverter model and whats the recommended setting for my battery.

Thanks for your help. If this questions is already answered somewhere please point me to the correct post.
I have similar battery though mine is 24v, what was the settings you finally settled for?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

ojeysky wrote: Thu, 23 Jan 2020, 22:36 Attached is my current settings, I like to know if this is okay or whether I should change some of the settings to something else.
Your new settings (the top ones with 27.6 and 26.9 V) are what I would recommend, except that I'd change the equalisation period to 1-3 days (see what seems to charge your battery fully, with your climate, panel orientation, shading, etc). The other settings are more like the recommended settings from the manufacturer. These are far too high in my opinion.
The other question now is the cut-off voltage, is there a workaround to increase that beyond 24v?
The only way is patched firmware (LFP flavour), but there is no 24 V patched firmware. 24.0 V is a dead flat, never approach voltage, so you can't protect your cells from low voltage that way. So you need to find something that monitors individual cell voltages (a BMS), and if one cell gets dangerously low, sends commands to the inverter to go to bypass mode. Ideally you should also have a system whereby if that doesn't work, you open contactors so that the battery doesn't get discharged further.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by ojeysky »

coulomb wrote: Fri, 24 Jan 2020, 06:48
ojeysky wrote: Thu, 23 Jan 2020, 22:36 Attached is my current settings, I like to know if this is okay or whether I should change some of the settings to something else.
Your new settings (the top ones with 27.6 and 26.9 V) are what I would recommend, except that I'd change the equalisation period to 1-3 days (see what seems to charge your battery fully, with your climate, panel orientation, shading, etc). The other settings are more like the recommended settings from the manufacturer. These are far too high in my opinion.
Yes the other settings are close to the manufacturer settings which indicates up to 3.60v(28.8v) charge rate. I have noted your comments on the equalisation part. Thanks
The other question now is the cut-off voltage, is there a workaround to increase that beyond 24v?
The only way is patched firmware (LFP flavour), but there is no 24 V patched firmware. 24.0 V is a dead flat, never approach voltage, so you can't protect your cells from low voltage that way. So you need to find something that monitors individual cell voltages (a BMS), and if one cell gets dangerously low, sends commands to the inverter to go to bypass mode. Ideally you should also have a system whereby if that doesn't work, you open contactors so that the battery doesn't get discharged further.
The battery comes with its own BMS though I really don't know at what voltage the low battery trigger as it has not gotten lower than 26v thus far.

Update: It's 10am and my inverter is already indicating a float status(both on my logging server and on the GK itself), I am very sure that the battery has not gotten enough juice yet. It seem the system is ignoring the bulk settings and may not move past the float voltage. Even though the battery is still receiving over 20A at float, is this fine or should I be worried?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by data »

Has anyone on here the 5048GK / Axpert VM III and is as annoyed as I am about the standby power consumption?

Since switching to ECO mode sending POPLG02 does not work, I am considering to modify the on/off switch so that
it can be remote controlled. Has anyone done this already or a better idea?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by ojeysky »

Please I have an emergency, I am getting a error 32 communication failure!!!! I am off-grid and really need this to come back on!
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by Roman khan »

ojeysky wrote: Sat, 25 Jan 2020, 20:54 Please I have an emergency, I am getting a error 32 communication failure!!!! I am off-grid and really need this to come back on!
Please check ethernet cable between controller card and mppt side.also wire between display panel and controller card.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by ojeysky »

Roman khan wrote: Sun, 26 Jan 2020, 02:02
ojeysky wrote: Sat, 25 Jan 2020, 20:54 Please I have an emergency, I am getting a error 32 communication failure!!!! I am off-grid and really need this to come back on!
Please check ethernet cable between controller card and mppt side.also wire between display panel and controller card.
I checked all those and they are all fine. If the inverter is bad can it also cause the communication not to happen with the remote? How do I confirm if the problem is not a bad inverter itself? Once I turn on the inverter, it just throw up the error 32, the inverter fan does not even roll.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by TitchRSA »

Hi @coulomb
I would really appreciate (and with me some others I know with a 5048MG) if you could patch this firmware (for LFP)! 8-)

As it happens, Weber and I are not particularly interested in the models with 450 V max SCCs. However, we are in communication with a German forum user who may be able to take on the patching of these models, starting with version 71.71. So there is hope!
So I am back to the fault 8 on the one 5048MG (3 in parallel) - worked fine for 2 days and then happened again last night. Have you had any feedback from the German forum regarding flashing a 5048MG with 71.71?

The 5048MG's being used are 71.70.

I haven't flashed any of these inverters before but now it seems I need to enter this domain and a little nervous as I do not work for the company using these units.
Any suggestions on how to get started with 'flashing'?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

TitchRSA wrote: Mon, 03 Feb 2020, 15:28 So I am back to the fault 8 on the one 5048MG (3 in parallel) - worked fine for 2 days and then happened again last night. Have you had any feedback from the German forum regarding flashing a 5048MG with 71.71?
Sorry, no news there. Last contact was mid November. Wow, has this been going that long?
I haven't flashed any of these inverters before but now it seems I need to enter this domain and a little nervous as I do not work for the company using these units.
Any suggestions on how to get started with 'flashing'?
Read the reflash instructions carefully. The most important thing is probably a USB to serial adapter that is likely to work; see the link to the post about the PL2303 chip. Read the last paragraph, re "bricking" the inverter. It's rare, but when it happens it can be scary as hell, but you can recover from it if you don't panic and haven't done something stupid like flashing with the wrong firmware version. Flashing 71.71 over 71.70 is very low risk.

Also remember that you have 3 comms cards, so if one proves unreliable at 9600 bps for flash writing, you can swap with one of the other ones. In day to day operation, the comms board only works at 2400 bps, which is a lot less demanding of inexpensive opto couplers. Hopefully, you won't have to go to that trouble.

Make sure that you have a D9 to RJ-45 cable which would have come with the inverters. If you've lost them, there are instructions on how to make one.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by TitchRSA »

Hi @coulomb
Any suggestions on how to get started with 'flashing'?

Read the reflash instructions carefully. The most important thing is probably a USB to serial adapter that is likely to work; see the link to the post about the PL2303 chip. Read the last paragraph, re "bricking" the inverter. It's rare, but when it happens it can be scary as hell, but you can recover from it if you don't panic and haven't done something stupid like flashing with the wrong firmware version. Flashing 71.71 over 71.70 is very low risk.

Also remember that you have 3 comms cards, so if one proves unreliable at 9600 bps for flash writing, you can swap with one of the other ones. In day to day operation, the comms board only works at 2400 bps, which is a lot less demanding of inexpensive opto couplers. Hopefully, you won't have to go to that trouble.

Make sure that you have a D9 to RJ-45 cable which would have come with the inverters. If you've lost them, there are instructions on how to make one.
Excellent - thank you.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rezydent »

I have a question, where can I find the schematic PIP-5048MG? and otherwise, I would like to buy spare transistors and capacitors for this model. What types would you recommend to me.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

rezydent wrote: Sat, 22 Feb 2020, 03:28 I have a question, where can I find the schematic PIP-5048MG?
There are no schematics that I'm aware of. The closest I have found are block diagrams and simplified snippets in various service manuals. I have found no service manual dedicated to the PIP-5048MG / Axpert MKS II. So the closest things are my partial schematic captures for the PIP-4048MS, in the PIP inverter repairs and hardware modifications topic.
I would like to buy spare transistors and capacitors for this model. What types would you recommend to me.
The closest thing is again the PIP-4048MS part recommendations, now fairly old, but I believe it's still relevant: capacitors and MOSFETs post.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rezydent »

In that case, I will write to the manufacturer's website. Maybe they'll tell me which transistors and capacitors they used. Or maybe they will give a schematics.
I have a second question about the remote management panel ( LCD remote control display for 3024HS 5048HS 3024MS 2424MSX 4048MS 5048MS).
I bought such a panel. I have a distance between the inverter and the panel over 45 m. Is it possible to use converters in some way so that communication is maintained between the inverter and the control panel. I have an optical fiber between the buildings, as well as UTP twisted pair.
What solution would you suggest?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by paulvk »

I have talked to my inverters over long lengths of cable, with rs232 and the CRC you may find it works ok
but you will likely find you need to power the display from a separate supply.
Your other choice if you are capable of some hardware work is using two HLK-RM04 rs232 to TCPIP converters
they can join two rs232 devices together over TCPIP
I can confirm you can control the inverters over the internet , I use a VPN link over 250km to control my units using the HLK-RM04.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rezydent »

paulvk wrote: Fri, 28 Feb 2020, 17:06 I have talked to my inverters over long lengths of cable, with rs232 and the CRC you may find it works ok
but you will likely find you need to power the display from a separate supply.
Your other choice if you are capable of some hardware work is using two HLK-RM04 rs232 to TCPIP converters
they can join two rs232 devices together over TCPIP
I can confirm you can control the inverters over the internet , I use a VPN link over 250km to control my units using the HLK-RM04.
I was thinking about this converter. I have a panel power supply, so it won't be a problem.
I have the question.
And the basic question. Should I power this HLK-RM04 from an independent power supply?
Do I have equipment ground connect together, inverter and HLK-RM04? or Don't do this?
Before connecting LCD remote control display, the DIP switch must be changed in the inverter, Is this necessary? Is there nothing to change but connect to the computer?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

rezydent wrote: Sat, 29 Feb 2020, 03:41 Before connecting LCD remote control display, the DIP switch must be changed in the inverter, Is this necessary? Is there nothing to change but connect to the computer?
I believe that this is for being able to turn the inverter proper on and off, i.e. extending the on/off switch. If you don't need this ability, you could ignore that step.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rezydent »

coulomb wrote: Sat, 29 Feb 2020, 06:50 I believe that this is for being able to turn the inverter proper on and off, i.e. extending the on/off switch.
Yes, of course, that's it.
Only one thing puzzles me. When I connect the power supply to the transceiver and provide a common ground, the resistor begins to fry on the plate in PIP-5048MG on the one with the com port.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rddkrn »

Hello all,

This is my first post. I have been reading this forum for about 6 months.

I have two pip5048mg with 3,015 Wp panel each. The panel string is 9s. I use 18s LFP battery. Today I paralleled my two inverters. All works well except for unstable ac output voltage. The voltage changes from around 220V to 235V (for 230V setup) which is read on the LCD display. This caused the lights in my house flickering. This happen when the load is above 2kW and the pv output changes because of cloudy weather. This only happen in parallel, the two inverter have no problem in single mode. I don't know what's the problem and decided to run my inverters in single mode again. Maybe some one have the same problem or experience in parallel mode.

Thank you.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by coulomb »

rddkrn wrote: Sat, 14 Mar 2020, 17:53 This is my first post.
Welcome to the forum.
I use 18s LFP battery.
That's really unusual, if that's not a typo. So the battery voltage would be at 60 V or higher nearly all the time. I wonder if the inverter decides it can't dump power from the bus to the battery to stabilise the bus voltage because the battery is already too full.
Nissan Leaf 2012 with new battery May 2019.
5650 W solar, 2xPIP-4048MS inverters, 16 kWh battery.
1.4 kW solar with 1.2 kW Latronics inverter and FIT.
160 W solar, 2.5 kWh 24 V battery for lights.
Patching PIP-4048/5048 inverter-chargers.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by rddkrn »

Thank you @coulomb for your warm welcome.

Yes, I use 18s LFP and the voltage is around 60V. My unit is 64V battery input, so I though it will be fine with 18s battery setup. The inverter is running well in single mode more than 5 months. Last month I bought a new inverter. I was runing the new inverter same setup as the old one (single mode), and have no issue. But the two inverters have flickering issue in parallel mode.

Any suggestions will be appreciated.
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by Roman khan »

Hi every one i hope all of you will be fine,Please stay home and be safe from covid-19
I have a problem in my vmiii 3.2kw inverter .when there is low load it share with battery and drain battery .when load is increased it is ok. How i can resolve this problem?
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Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)

Post by data »

I just noticed a - what I think - weird bug on the Pip-5048GK ( VM III), most likely also present on the 5048MK (aka KING):

At the moment, there are two pylontech us2000b batteries attached to the inverter. Apparently, these report the max. discharge to the inverter.
In this case it is 50A (25A per module). Today, I noticed that the inverter switched to Line-Mode when power usage increased above 2.5kW. (50V * 50A)
So far so good.

But the inverter remains in Line Mode, even if the batteries are charged. Using the App, I had to switch to utility charging for a few seconds and
then back to solar only in order to get back to SBU mode. In the past we were experiencing the same issue on a 5048MK but did not realize it was
most likely also due to a power draw above the limit communicated by the batteries.

Anybody else noticed this behavior?
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