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PIP-4048MS inverter

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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 11:44am
Originally posted by coulomb coulomb wrote:

The battery voltage has to be more than 0.1 volts below the float setting (setting 27) for 30 minutes.


Unless I read this wrong, this is great news isn't it? It means it will reset to bulk charging overnight (or if there's not enough PV input for 30 minutes)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 1:29pm
The Latest Patched Firmware Description

     

LiFePO₄ and Lead Acid Patched Firmware

This post describes both the LiFePO₄ (LFP, Lithium Iron Phosphate) and Lead Acid patched firmware for PIP-4048MS, Axpert 5 KVA and similar machines with other names. It is based on Voltronic's 72.70 firmware, which is supplied with newer machines that have single (not dual or triple) MPPTs (Solar Charge Controllers) that are capable of solar charging at up to 80 A. We believe that it is safe to use on all single MPPT post-2013 machines.

Warning! and disclaimer. It is possible to set the total charge current to 140 A, which may be beyond the capacity of your hardware. I don't believe that this is a problem, since the Solar Charge Controller (SCC) will limit itself to its own hardware capacity. All our testing has been on an early 2016 machine which came with 72.40 firmware, and no adverse effects have been detected to date, apart from the 60 A current limit noted below in the section headed "SCC Compatibility". So it all should be safe, but caution is advised particularly during initial testing.

This patched firmware has been developed mainly to overcome a bug in the charging algorithm for these machines. The bug manifests itself as not charging the battery fully. When charging from solar, the charge will often transition from bulk/absorb stage to float stage far too early, often in the first few minutes of charging.

The reason has been traced to a minor bug in a function far removed from the main charge control function, which is presumably why it escaped detection for so long. It's also why we thought that the manufacturer was ignoring the battery voltage termination condition. In fact, they weren't ignoring it; the typographical error (less than instead of a greater-equals) means that they compare against the float voltage setting less half a volt instead of the bulk/absorb (CV) voltage setting less half a volt, which makes the voltage criterion ineffective.

Our patch fixes this typo, which effectively re-introduces the battery voltage termination criterion: the battery voltage must be near the bulk/absorb voltage setting (parameter 26 on the LCD menu) as well as the charge current being at the low value. This means that the absorb stage cannot complete until the battery is close to or above the required absorb voltage. This bug is more likely to be seen when the maximum charge current setting is high; as a result, it seems to be less commonly seen with lead acid batteries (which typically charge at C/10 to C/6.7).

For those interested in the exact new charge terminating conditions, here they are. Others can skip this somewhat complex paragraph. The battery voltage must stay at or above a threshold, and the charge current must stay at or below another threshold, for at least 30 seconds. The voltage threshold is the bulk/absorb setting (parameter 26) minus 0.5 V. The current threshold is one ampere below the maximum of two values:
1) the sum of all the Maximum Charge Current settings (parameter 02) for all paralleled machines, divided by 5 (15 for LiFePO₄), and
2) the number of paralleled machines multiplied by 5 amps.
The official firmware is the same except that
(a) the voltage threshold is the float setting less half a volt,
(b) the total of maximum current settings is always divided by five, and
(c) the required time is 10 minutes (72.70 only).
When the new absorb (CV) time setting (setting 32) is set to a number (not "Aut"), the current threshold becomes 2 A, which is practically impossible to achieve. The effect is that when setting 32 is a number, the absorb stage will last for that many minutes.

Example 1: maximum charge current (setting 2) is 100 A, and the Lithium iron Phosphate version of the patched firmware patch is in use. There are two paralleled machines. The current threshold is an amp less than the maximum of (100/15, 2*5) = max(6.7, 10) -1 = 9 A. So the current has to read at or below 9 amps.

Example 2: maximum charge current (setting 2) is 40 A, and the Lead Acid version of the patched firmware is in use. There is only one machine. The current threshold is an amp less than max(40/5, 1*5) = max(8, 5) - 1 = 7 amps. So the current reading has to be 7 A or less.

The patched firmware also fixes a new bug in the case where setting 32 is a number of minutes (not "Aut"). After reaching the absorb voltage setting for 10 seconds, the official firmware doesn't care if the battery voltage goes low again, say due to low solar input. It will still count this as absorb time. We now only increment the counter representing time in the absorb phase when the voltage criterion is met (battery voltage is greater than the CV setting less half a volt).

Patched firmware version 72.70b also fixes a new bug, whereby in official firmware version 72.70 is it now *too hard* to exit absorb stage and enter the float stage. This is because they increased the "qualification time" when the battery voltage has to be above a threshold and the battery current has to be below a threshold, from 30 seconds to ten minutes. This was perhaps a misguided attempt to fix the original charge bug, which you will recall is that it was *too easy* to go to float (and it did so much too early).

Having gone to the trouble of devising the patched firmware, some other changes became desirable. Some of the 7 segment character renderings leave something to be desired, particularly letters "r" and "k". Weber devised a set based on what others have done, and a desire to have most character renderings distinct. In the end, he decided that "S" and "5" need to use the same rendering. Some letters like "M", "W", "X" and "k" you can't do much with, but I think he's chosen good compromises.

When more than one machine is parallelled, one is designated the master, with "HS". This was presumably because they thought their rendering of an H looked more like an actual M than their rendering of an M did. In this firmware, we've used a different rendering of an M. After a while, you get used to reading the three separated segments as an M. Try to imagine it's like this:


It's also desirable that the patched firmware be readily identified, yet software such as Watchpower should not be confused by a version it's never heard of. Therefore, the U1 main version display screen has been replaced with either an LF1 (lithium iron) or Pb1 (lead acid) display screen, still with 72 in the middle, but now with 70b on the right. Subsequent versions of the patch will be labelled 70b, 70C and so on. Enquiries such as QFVW (main firmware version enquiry) still return 00072.70 as before, so that Watchpower still works properly (with the limitations described at the end of the following post).

LiFePO₄ patched firmware only

All changes from here on are made to the Lithium Iron Phosphate (LiFePO₄) version of the patched firmware only. For other common lithium chemistries the "lead acid" patched firmware should used, typically with 14 cells in series.

For LiFePO₄ batteries, the most important other desired change is the battery low cutoff voltage, where the battery will be effectively disconnected to protect it from under-voltage. The maximum that this voltage can be set to in the official firmware is 48.0 V, which is unsuitable for lithium iron phosphate batteries. We have added 4.0 V to the manufacturer's range of 40.0 to 48.0 V, allowing cutoff voltages of 44.0 to 52.0 V. This assumes 16 cells in series.

In cases where the battery low cutoff voltage defaulted to 42 V, it now defaults to 44 V.

The battery low warning used to happen at 2 V above the battery low cutoff voltage, and reset at 4 V above the battery low cutoff voltage. They now happen at 0.5 V and 1 V above.

The transition from the "float" charging stage to the "bulk" charging stage was set at 4 V below the float setting. This has been reduced to 1 V below.

It also makes sense for parameter 12 (back to utility voltage) to be increased. This is the battery voltage below which the loads will switch back to the utility. This is used when output source priority (parameter 01) is set to Sbu or SoL. Now, the range of this setting has been increased by 2 V, so it is now 46 V to 53 V.

Change Summary
LiFePO₄ and Lead Acid Patched Firmware
* The repaired voltage criterion for transitioning from absorb stage to float.
* For non-automatic absorb stage timing, only time when the battery voltage is near the CV setting counts as being "in absorb".
* "Font" improvements, and HS -> MS for Master units.
* Firmware revision display screen contains patch revision.

LiFePO₄ patched firmware only
* The bulk/absorb to float transition occurs with a different current threshold: (sum of maximum charge current settings) divided by 15.
* Low battery cutoff voltage range changed from 40-48 V to 44-52 V.
* Back to utility voltage range changed from 44-51 V to 46-53 V.
* Float to bulk charge stage transition occurs at 1 V under the float setting.
* The battery low warning occurs at the cutoff voltage plus half a volt, and returns at cutoff plus one volt.

SCC firmware compatibility

The Voltronic main firmware version 72.70 normally coexists with SCC firmware version 04.10. If you use either the original 72.70 or our patched 72.70b with any earlier version of the SCC firmware, the inverter refuses to charge from solar unless you set the maximum total charge current (parameter 02) to 60 A or lower.

So if you need a higher maximum charge current and you want to use this patched firmware, you will also need to update the SCC firmware to version 04.10 (provided below).

Edit: a belated but heartfelt thanks to Weber, who did 99% of the grunt work of implementing the hex file patches with text documents and a hex editor.

Edit 2: removed the word "strict" (it has no meaning with analogue variables like charge current) and made the truncation to a whole number of amps more explicit. Added two examples.

Edit 3: Added a third difference to the official firmware (case (c)). Also "below" -> "at or below" for clarity.

Edited by coulomb - 06 March 2017 at 6:27am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 1:31pm
The Latest Patched Firmware Instructions

dsp_LF1_72.70b.zip
dsp_Pb1_72.70b.zip
SCCMPPTReflash_V4.10.zip (if needed; 1.8 MB)

NOTE: the above V4.10 SCC firmware is for the SCC inside a PIP-4048 / Axpert 5KVA; it is not suitable for use with a PCM60x solar controller. The PCM60x and the SCC have essentially the same hardware, but the PCM60x makes its own decisions about voltage and current, and drives its own display, while the SCC has no display of its own, and relies on messages from the Axpert's DSP to tell it what to do.



You will need a Windows computer and a USB to D9 serial adapter, or an older computer with a real serial port. (You can't use the USB port of the inverter if it has one; that's only for monitoring programs.) Use the serial to RJ45 cable that came with your inverter-charger. Some serial adapters (or possibly the combination of serial adapter and Windows version) seem to be more suitable than others;
see earlier posts on this.

Power up your inverter charger by connecting the battery. Turn on the inverter switch. Make sure that your computer has power that won't go off during the reflash process.

Download and unzip the appropriate zip file above. The zip file does not have a folder inside it. (Version 72.70A was different; sorry about that inconsistency. ) Use the Windows File Manager "Extract All..." context menu item (right click menu) and follow the prompts to extract into a new folder. Make sure you are not running any software that could be using the serial port, in particular, exit the WatchPower application. Don't just close the application; use the right mouse button on the WatchPower system tray icon, usually at the bottom right of Windows:



The file name the reflash tool looks for is fixed, it's always "dsp.hex" in the same folder as the reflash tool. In the zip file, dsp.hex is already a copy of the patched firmware.

Finally, double click on the ReflashTool_Xseries.exe icon. It should bring up the small reflash application. If necessary, change the serial port selection to the one that connects to your inverter.

Click on the Update button, and answer Yes to "Are you sure". Nothing will appear to happen for 10-20 seconds, so don't panic. Eventually, new text should start appearing in the box under the progress bar, saying that erasing has been successful and so on. It will take some 8 minutes to complete the flash programming. At the end, just click OK and exit the reflash application.

If you get an error to do with the serial port (e.g. invalid serial port, or the serial port doesn't appear in the drop down list), it's probably because you have something running that is keeping the serial port in use. Double check that you have exited WatchPower and any terminal emulation programs like TeraTerm. You may need to change the com port used by the USB to serial adapter to be named COM1 through COM9 for the reflash tool to see it (Device Manager, Ports, Properties, Advanced).

The standard instructions say you should revert all the settings to standard, then change them to suit your needs. As long as you had been running a recent firmware (52.30 or later), this should not be necessary. But if you were running an earlier firmware, or if the settings seem strange after the update, use WatchPower to reset to default settings, then change them to suit your needs.

The instructions say to turn off the inverter after the firmware update. This doesn't seem to be necessary.

If something goes wrong, see the If you think your inverter is bricked post.

Using Watchpower

WatchPower comes for free and allows basic interaction with the inverter(s). However, many find that it does not meet all their needs. In this case, consider some of the many other monitoring programs available. A few of them are referenced from the index at the start of this thread.

WatchPower is not aware of the changes to the range of the battery low cutoff voltage and the back to utility voltage parameters. You will not be able to change these values with WatchPower outside their original range. Instead, you can use the LCD buttons, or any software that changes these settings via the PSDV or PBCV commands.


Edited by coulomb - 03 March 2017 at 2:48pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote weber Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 2:12pm
Originally posted by andys andys wrote:

Unless I read this wrong, this is great news isn't it? It means it will reset to bulk charging overnight (or if there's not enough PV input for 30 minutes)

Didn't it go back to bulk overnight with previous firmware, based on the existing criterion of going more than 4 volts below the float setting (or 1 V below for our LFP patched versions)?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 2:14pm
Originally posted by weber weber wrote:

Originally posted by andys andys wrote:

Unless I read this wrong, this is great news isn't it? It means it will reset to bulk charging overnight (or if there's not enough PV input for 30 minutes)

Didn't it go back to bulk overnight with previous firmware, based on the existing criterion of going more than 4 volts below the float setting (or 1 V below for our LFP patched versions)?

Mine doesnt drop 4V overnight. And I don't use patched firmware - I was holding out for an official fix
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Post Options Post Options   Thanks (0) Thanks(0)   Quote weber Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2017 at 7:47pm
Fair enough. So yes, it should let Lithium batteries return to bulk overnight, without requiring our patches.

But they still haven't fixed the bugs that let it go prematurely from bulk to float. Our patched firmware remains the only fix for that, whether for lead-acid or LFP.

Edited by weber - 24 February 2017 at 10:32pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JvdSpoel Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2017 at 1:12am
How do I upload use manual for Axpert version 70.70? I got the original pdf with all relevants comments.

It also gives the complete equalisation procedures.

Edited by JvdSpoel - 25 February 2017 at 1:16am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2017 at 6:37am
Originally posted by JvdSpoel JvdSpoel wrote:

How do I upload use manual for Axpert version 70.70?

Just use the Post Reply button under the last post of the page, and use the File Upload toolbar button (yellow folder with the G-clamp around it, ) to start the file upload dialog. Just hit the Choose File or Browse button, locate your file, and follow the prompts. You can add text to the upload as well.

The file size limit is 3 MB. If it's larger than that, or not a usual file format (.pdf, .zip. .rar etc) then you'll have to upload to a third party storage site and post a link.

[ Edit: it seems that new members don't get upload privileges, until they have made a certain number of posts. ]

I'd be interested to know where you obtained the file, if you're willing to say.

[ Edit: added Post Reply button image. Some browsers have a Browse button in place of a Choose File button.]



Edited by coulomb - 25 February 2017 at 6:26pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2017 at 6:55pm
JvdSpoel was kind enough to email me his copy, since he doesn't have upload privileges yet.

You can access it from this Google Drive link. It's viewable from there, but I find it more convenient to download it (3.9 MB) and view locally with a PDF viewer.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JvdSpoel Quote  Post ReplyReply Direct Link To This Post Posted: 27 February 2017 at 4:36pm
Hi All,

Error Code 51

I got a couple of Axpert 5MKS inverters which I have replaced with new one's for customers which gave me a Error 51. The inverters still work but will come up with the error intermittently.

I would like to repair these one's so that I can use them for swopout units - anybody who have had these problems and repaired the mainboard who can assist? Which components are the probable cause - the IGBTs or Mosfets. Since they are working I assume that it could be component failure which is busy to happen.

The service manual does not give a lot of information about the error and what needs to be replaced. Like a error 09 I know that the IGBTs and mosfets had gone.

Thanks
Johan

   
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 27 February 2017 at 9:07pm
Originally posted by JvdSpoel JvdSpoel wrote:

Error Code 51

I got a couple of Axpert 5MKS inverters which I have replaced with new one's for customers which gave me a Error 51. The inverters still work but will come up with the error intermittently... Which components are the probable cause
   

Error 51 is only set from the two main interrupt routines. I don't have a lot of detail at this stage, but it seems to be associated with an instantaneous current sample exceeding 192 A. Presumably this is on the battery side.

Assuming that there aren't such currents about, even for short periods of time, the fault would seem to be associated with that current measurement. So some current shunt (which may be an area of printed circuit trackwork), or filter components associated with that measurement. Likely there is also an op-amp to amplify the small shunt voltages to the three volts or so that represent full scale on the DSP analogue inputs. Any components around this op-amp could cause such trouble.

This one doesn't seem to involve the MOSFETs or IGBTs.

[ Edit: "during one of the two" -> "from one of the two" (main interrupt routines) ]

Edited by coulomb - 27 February 2017 at 9:09pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 02 March 2017 at 9:36am
Does anyone know if the Parallel mode still lets you set all the same parameters as single mode?

eg. User battery mode with custom battery voltages.

The manual has confused me a bit and has me alarmed as I was planning to use parallel mode with a LiFePO4 pack.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 02 March 2017 at 11:28am
Originally posted by andys andys wrote:

Does anyone know if the Parallel mode still lets you set all the same parameters as single mode?

Yes, certainly user battery type and all that. I think the only setting you lose is the one associated with the low power mode, where it pulses the output when the load is very low.


Quote The manual has confused me a bit...

Weber was joking to me recently in email that we need a patched manual
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 02 March 2017 at 1:25pm
Originally posted by coulomb coulomb wrote:

I think the only setting you lose is the one associated with the low power mode, where it pulses the output when the load is very low.


OK, thanks. That reminds me - once paralle mode is set up, is it possible to regularly power down a slave (to save on idle power at night) by turning off the switch at bottom, without stuffing up the parallel mode?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2017 at 2:41pm
Somehow I didn't take notice of the fact that one of the changes in official firmware 72.70 is that the "qualifying time" for transitioning from absorb stage to float stage has been increased from 30 seconds to 10 minutes. It is possible that they did this in a misguided attempt to fix the original charge bug, which allowed a transition from absorb or even bulk stage to float stage too early. The qualifying time is the time that the voltage must exceed a threshold, and the current stay below a threshold, with no exceptions. When utility charging, this is not much of a problem, but when charging from solar (hopefully the common case), the many overshoots and undershoots of battery voltage and current due to clouds, sun, and load changes, makes it exceedingly difficult to meet both criteria for 10 minutes with no exceptions. User Don from the South African Power Forum, has found that his twin Axperts typically won't go to float, bouncing around most of the day near the absorb voltage setting (setting 26), until he switches to utility charging. After utility charging is started, the absorb stage completes in 20-60 minutes.

At about the time I was reading this, I was also having trouble getting from absorb stage to float stage, running patched firmware 72.70A. I thought that this was due to one cell "running away" to over 3.6 V, causing my LyteFyba Battery Management System to turn off the PV contactors. This protects my cell, but stops the charging altogether, and it has to charge back to where it was, and start the 10 minute timer all over again. It occurred to me that if I had the 30 second qualifying time that was used in official firmware version 72.60 and earlier, I would avoid this problem.

Thus was born patched firmware 72.70b, the same as patched firmware 72.70A except for the 30 second qualifying time to transition from absorb stage to float stage. This only applies when the absorb time setting (setting 32) is set to "Aut" (automatic, the default setting).

See this earlier pair of posts for description and download details (these were the 72.70A posts, now updated for 72.70b).

I've tested this at home, and although available solar power has been poor, today it made float quite soon after the current dropped below my threshold (8 amps). Time will tell if this still happens when much more solar power is available.

Edited by coulomb - 03 March 2017 at 2:55pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2017 at 6:04am
Just curious what generator everyone is using with these units.

I have been successfully testing my Honda "tradie" style generator (3.3kVa) at 30A or 40A, but it is not big enough for new system, I'd like to charge at up to 10kW.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote offgridQLD Quote  Post ReplyReply Direct Link To This Post Posted: 05 March 2017 at 5:16pm
I have tested my first PIP4048 with a Kubota J108 8kw diesel generator. Just tested it for a few hrs but only at 3000w or so.

Thanks for the efforts on the new Patch firmware.Today I successfully upgraded the 2nd pip I purchased late last year to the latest patch.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monkeytom Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 12:41pm
yes you can power down the slave whenever and save your idle current at night and day and switch it back on whenever.
I use a Digital Current switch on the inverter output to turn on the second PIP when my load exceeds 2750 watts it switches a timer relay and holds the slave on for approx. 30 minutes, this works well with the oven thermostat, I have had it working like this for over a year now and its going great, I was thinking I will change the Master and slave inverters around soon so they can each share the working load hours better.
2 x PIP4048HS
15S2Px3 45x90Ah TS and
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 18 March 2017 at 1:43pm
Had a brainstorm today and figured out I am happy to just mount the damn units upside down to improve heat transfer, and just flip the display (very easy, only takes seconds) to make it easy to use.

Just wanted to share with anyone thinking of flipping the fans - this seems easier and safer. Sorry if this has been done before :)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulvk Quote  Post ReplyReply Direct Link To This Post Posted: 18 March 2017 at 2:55pm
I still think they need more cooling the fans were slowed down too much, my units (the older ones with external black heatsink) get to over 50C on the inverter heatsink inside the units, so I have external temperature controlled fans to keep it below 40C
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Post Options Post Options   Thanks (0) Thanks(0)   Quote weber Quote  Post ReplyReply Direct Link To This Post Posted: 18 March 2017 at 3:13pm
Originally posted by andys andys wrote:

Had a brainstorm today and figured out I am happy to just mount the damn units upside down to improve heat transfer, and just flip the display (very easy, only takes seconds) to make it easy to use.


Ha! Love it! That's brilliant, andys! It made me lean back in my chair and laugh out loud.
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andys Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2017 at 6:06am
Originally posted by paulvk paulvk wrote:

I still think they need more cooling the fans were slowed down too much, my units (the older ones with external black heatsink) get to over 50C on the inverter heatsink inside the units, so I have external temperature controlled fans to keep it below 40C


I think I found a simple solution for this too: Remove the blue wire to the fans, it causes them to stay at 100% all the time.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote ejb Quote  Post ReplyReply Direct Link To This Post Posted: 23 March 2017 at 10:04am
Originally posted by coulomb coulomb wrote:


Error 51 is only set from the two main interrupt routines. I don't have a lot of detail at this stage, but it seems to be associated with an instantaneous current sample exceeding 192 A. Presumably this is on the battery side.


Not sure if this helps, but...

I have a MPP Solar branded 4048 with an Error 51, for me it must be related to PV input current - as the error doesnt re-occur with PV input switched off, but all other connections active. (and now re-occurs within an hour if PV input is on, even with half the panels disabled)

My setup is 2x 3KW arrays of PV connected to 2x parallel PIP-4048MS into 24x 2v 800AH SLA batteries.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tuly Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2017 at 6:17am
I have two giant branded IPS 4048 inverters connected in parallel. I am trying to connect to auto start a generator that is a 10 kva. http://www.bluedm.com.au/10-kva-diesel-generator-240v/. This has a comair controller with ATS capability closing a dry contact.

Connecting directly to one of the inverters dry contacts will start the generator but once output is from utility the generator stops.

So I connected a latch relay, the generator starts okay but it will not auto stop.

Thinking of putting in a latch delay timer so it will latch and run for a set time. I was wondering if anybody has set up auto start stop on there inverters and how they achieved it?

I am too experiencing the charging problem with max bulk voltage not being reached. I have reverted back to using my outback charge controller.

Thanks


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Post Options Post Options   Thanks (0) Thanks(0)   Quote coulomb Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2017 at 11:38am
I'm taking apart my PIP-4048 to upgrade the MOSFETs and capacitors. It's a slog getting to the main board. The mains connectors to the main board are either very tightly pushed on, or are in fact soldered. So it's necessary to disconnect the mains wiring at the terminal block ends. To get to the lower (AC output) wires, it's necessary to remove the top terminal block.

It took me a while to find the screws allowing me to do that, and I've taken PIPs apart before. So I thought I'd post a photo showing the screws here, in case it helps someone else ,and so I can find it myself in the future.

     

After removing these two screws, the top terminal block can slide out to reveal similar screws to the above, for the lower terminal block. The lower terminal block also has to be removed.

Edit: There is also the "last screw" (nine on the main PCB) holding down the main board. It's hidden underneath one of the date stickers, as shown in the second photo. (Before removal, it's far less obvious that there is even a screw there at all). There is also one between the battery terminals.

[ Edit: lower terminal block has to be removed as well. Also added second photo and last paragraph. ]

Edited by coulomb - 24 March 2017 at 7:57pm
Learning how to repair and re-flash TC/Elcon chargers and PIP-4048 inverter-chargers.
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