PIP-4048MS and PIP-5048MS inverters

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Tue, 19 Feb 2019, 09:15

swagner2018 wrote:
Tue, 19 Feb 2019, 01:27
Prolific PL-2303TA chip and driver version 3.2.0.0 and 3.6.81.357
OS: Windows 10 Pro 64Bit
For what it's worth, mine (which has done many firmware updates) is a PL2303 RA and the driver is 3.8.12.0. Windows 10 home, 64 bit.
It looks like your Prolific driver could do with updating. I found Win_Driver_Prolific_3_2_0_0.exe in my downloads folder; that sounds like the same executable that you found.
The Connection to Watch Power via USB to RS232 works without any problems either with the FTDI or Prolific.
That's good sign, though I note that firmware updating happens at 9600 bps, but WatchPower and all other commands operate at 2400 bps. It's very unlikely to make a difference.

As already mentioned by jdavies1994, make sure you exit WatchPower via the tray executable, not the File/Exit menu:

Image
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-4048MS and PIP-5048MS inverters

Post by swagner2018 » Sat, 23 Feb 2019, 17:44

Hi All,

I have tried now 4 different Laptop with different Windows 10 version and german and english OS version and still not possible to update the Firmware.
WatchPower communication via USB to Serial works without any issus on all OS.
When I try to update the Firmware I can see the LED on the USB to Serial adapter is flashing 3-4x but then it stops and create the already mention messages, ReflashTool "Can not open serial port"
WatchPower was deinstalled and I disabled on 2 Laptops which used "IPMI Serial over LAN (SOL) which used COM1" in the BIOS / UEFI and deleted all installed unused driver version.

I guess it's the Inverter Type or maybe it's a Clone, can somebody let me know if this PCB is used in other Inverters and if the Firmware update works on them.
PCB_Serial.jpg
PCB_Serial.jpg (414.53 KiB) Viewed 1925 times

The Inverter is a Steca 5000-48 with the following Label
Steca_5000_48.jpg
Steca_5000_48.jpg (975.25 KiB) Viewed 1925 times

The Current installed Firmware is 72.10

Many thanks for your help and best regards,

Stefan

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Re: PIP-4048MS and PIP-5048MS inverters

Post by swagner2018 » Sun, 24 Feb 2019, 01:59

Just tried it now with Windows XP, it's the same... so I guess now there are just two options.
1. Both USB to Serial adapter are not usable with the update software even when WatchPower works.
2. Firmware update is not possible with the Steca PLI 5000-48

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Re: PIP-4048MS and PIP-5048MS inverters

Post by dapsaille » Sun, 24 Feb 2019, 02:36

Hello everyone,
i'm bored with a clone that cannot be upgraded, ...and i've just received 2 others units that cannot be upgraded too, even if the seller sells them for Voltronic models (it will be easy to return them).

Sorry if this is not the right thread but do you think that this one is a REAL voltronic, the seller claim to be an officiel MPPS Solar distributor but ... i don't trust anyone anymore :D
https://www.ebay.fr/itm/solaire-onduleu ... 2746191559

PIP-5048MS 1.0PF 64v, as far as i've read the topic, is eligible to the super/giga firmware ? ;)
Thanks for any info.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by lopezjm2001 » Sun, 24 Feb 2019, 07:54

dapsaille wrote:
Sun, 24 Feb 2019, 02:36
Sorry if this is not the right thread but do you think that this one is a REAL voltronic, the seller claim to be an officiel MPPS Solar distributor but ... i don't trust anyone anymore :D
https://www.ebay.fr/itm/solaire-onduleu ... 2746191559
I bought mine from maximum solar on Ebay on January 2015. Still works. It is genuine, not a clone.
2016 BMW i3 94AH
13.08 Batt.Kapa.max 29.7 kWh

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Sun, 24 Feb 2019, 08:39

swagner2018 wrote:
Sat, 23 Feb 2019, 17:44
I guess it's the Inverter Type or maybe it's a Clone, can somebody let me know if this PCB is used in other Inverters and if the Firmware update works on them.
It certainly looks genuine to me, and I hope you don't mind but I've used your sticker as an example of a presumed genuine model with a custom sticker, in the Do I Own a Clone? post. [ Edit: your serial communications board looks identical to the 2017 model in this post. ]
The Current installed Firmware is 72.10
Are you totally sure it's 72.10, not perhaps 74.10? I say this because there doesn't seem to be any indication on the label that this is a 64 V model. If it was a non-64 V model (max 58.4 V charging), then I'd expect exactly this behaviour not being able to update, but I'd also expect to to come with main firmware version 74.XX. (But I note that this page presumably describing the same model as yours, lists the maximum battery voltage as 66 V).

The other thing is that you need to update to patched firmware version 72.20e (or factory firmware version 72.20), not 72.70c (which sounds like it would be compatible and more recent, but is neither), or 73.00e (sounds more recent, but isn't). Again, attempting to update to either of these two will probably result in firmware update failures exactly like the kind you are seeing.
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-4048MS and PIP-5048MS inverters

Post by coulomb » Sun, 24 Feb 2019, 08:54

dapsaille wrote:
Sun, 24 Feb 2019, 02:36
Hello everyone,
i'm bored with a clone that cannot be upgraded, ...and i've just received 2 others units that cannot be upgraded too, even if the seller sells them for Voltronic models (it will be easy to return them).

... do you think that this one is a REAL voltronic, the seller claim to be an officiel MPPS Solar distributor but ...
https://www.ebay.fr/itm/solaire-onduleu ... 2746191559
That seems to be the French version of the MPP Solar Ebay page, and the seller's name (maximum_solar) is the same one I bought my genuine machine from over three years ago. MPP Solar are definitely a genuine reseller; being based in Taiwan, they seem to have good contact with the manufacturer (Voltronic Power does its R&D in Taiwan but manufactures in China).

So your machine should definitely be able to be updated. Please check all the usual problems.
PIP-5048MS 1.0PF 64v, as far as i've read the topic, is eligible to the super/giga firmware ? ;)
It's eligible for patched firmware version 72.20e and later. Note that the firmware is merely patched; 99.9% of the code is factory original, so I don't think you should expect "giga firmware" improvements.
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-4048MS and PIP-5048MS inverters

Post by dapsaille » Sun, 24 Feb 2019, 14:34

hehehen,
thanks for the return,
i've got a return by mail from the company too.

I will return my 2 fakes and buy from this seller.
Thanks again

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Re: PIP-4048MS and PIP-5048MS inverters

Post by swagner2018 » Sun, 24 Feb 2019, 18:50

Hi Coulomb,

The Steca PLI 5000-48 was sold with Firmware 72.10 and everywhere it's mentioned it's 48V, however the max value for the Batterie listed in Menue 13 is 64V.
To make a looong story short,... I have successfully updated 72.10 ---> 72.20e

The next one who will update a Steca PLI 5000-48 will now find this information :-)

The Hardware and Software I have used:

Inverter: Steca PLI 5000-48
Inverter Firmware: 72.10 --> updated to 72.20e
Value Menu 13: max 64V
PC: Lenovo T430
OS: Windows 10 Pro 64 bit
OS Version: 10.0.17763 Build 17763
USB to Serial adapter: Chipset PL-2303 XA/HXA
Driver version: 3.2.0.0

Many many thanks for your time and help to find at the end the solution, great work I appreciate it.

Best Regards, Stefan

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Re: PIP-4048MS and PIP-5048MS inverters

Post by catalincre » Fri, 01 Mar 2019, 06:15

Hi Stefan, where did you find a cable with that chipset? Please give us a link. I will also try to update my clone.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by lopezjm2001 » Fri, 01 Mar 2019, 06:41

Maybe you need to buy the counterfeit PL2303 chipset to use with the counterfeit PIP....https://owenduffy.net/software/ATB/PL2303.htm :D :D :D :D :D
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Re: PIP-4048MS and PIP-5048MS inverters

Post by zafris » Wed, 06 Mar 2019, 18:41

coulomb wrote:
Sun, 24 Feb 2019, 08:54
dapsaille wrote:
Sun, 24 Feb 2019, 02:36
Hello everyone,
i'm bored with a clone that cannot be upgraded, ...and i've just received 2 others units that cannot be upgraded too, even if the seller sells them for Voltronic models (it will be easy to return them).

... do you think that this one is a REAL voltronic, the seller claim to be an officiel MPPS Solar distributor but ...
https://www.ebay.fr/itm/solaire-onduleu ... 2746191559
That seems to be the French version of the MPPSolar Ebay page, and the seller's name (maximum_solar) is the same one I bought my genuine machine from over three years ago. MPPSolar are definitely a genuine reseller; being based in Taiwan, they seem to have good contact with the manufacturer (Voltronic Power does its R&D in Taiwan but manufactures in China).

So your machine should definitely be able to be updated. Please check all the usual problems.
PIP-5048MS 1.0PF 64v, as far as i've read the topic, is eligible to the super/giga firmware ? ;)
It's eligible for patched firmware version 72.20e and later. Note that the firmware is merely patched; 99.9% of the code is factory original, so I don't think you should expect "giga firmware" improvements.
Hi,

I have the same problem that @dapsaille whith a clone that can't be upgrade... any solution please?

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Thu, 07 Mar 2019, 08:20

A post by blacktiger63 was moved t the "Re: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)" topic: here.
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-4048MS and PIP-5048MS inverters

Post by coulomb » Thu, 07 Mar 2019, 08:24

zafris wrote:
Wed, 06 Mar 2019, 18:41
... a clone that can't be upgrade... any solution please?
Sorry, the only solution is to talk to your supplier, to see if s/he will replace your clone with a genuine model. Some suppliers seem to be genuinely caught off guard by the clones, themselves believing the products to be genuine. A few other clone owners have had success with this. Good luck.
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-4048MS and PIP-5048MS inverters

Post by Cactus » Sat, 09 Mar 2019, 03:54

Hi everyone,
I've been following this thread for a while and only today actually joined the forum.

I'm based in Joburg South Africa and own a (rather unusual I guess) Axpert 4000va / 4000W Pf 1 Voltronics (looks authentic) running 54.10 firmware sold to me by Full Circle Solar that recently blew up (leading me to this forum). Fortunately I was able to repair it and in the process upgrade it, physically, by populating the 4 empty mosfets (Q19,Q24,Q38,Q40) that were not present while replacing the blown ones that were actually there. I figured at worst they would help share the load if nothing else. I also had to replace the IGBT's Q27,Q28,Q29,Q30 and as well as Q31 and D13 and the capacitors mentioned on this forum. Anyway it is thankfully working again.

My questions are as follows:

1. I've noticed since re-commissioning the inverter that U2 (SCC firmware version which is 4.12) in the LCD menu only shows up if the solar panels are actually producing power, it is absent and does not report if I scroll through the menu in the evenings. Is this normal, I never took note before?

2. Does anyone here have any experience with these units as I would desperately like to use your patched firmware and believe the hardware should be up to the task if I could load 5Kva firmware on to it. Any suggestions?

3. Is there any way to download the current firmware on the unit for re loading should none of the patched firmware work?

Many thanks in advance for any assistance,
Luke.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by weber » Sat, 09 Mar 2019, 07:10

Cactus wrote:
Sat, 09 Mar 2019, 03:54
1. I've noticed since re-commissioning the inverter that U2 (SCC firmware version which is 4.12) in the LCD menu only shows up if the solar panels are actually producing power, it is absent and does not report if I scroll through the menu in the evenings. Is this normal, I never took note before?
Yes. That's perfectly normal.
2. Does anyone here have any experience with these units as I would desperately like to use your patched firmware and believe the hardware should be up to the task if I could load 5Kva firmware on to it. Any suggestions?
I assume this is an Axpert MKS 4K. I have no experience of them. There is a small chance that 72.70 or 73.00 based firmware might work. More likely it will brick your inverter, given that your existing firmware (54.10) is not something we've ever seen on an MKS 5K.
3. Is there any way to download the current firmware on the unit for re loading should none of the patched firmware work?
No. There's no way for mere mortals to extract the firmware. You need special equipment and knowledge, and even then it may not be possible. Sorry.
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Re: PIP-4048MS and PIP-5048MS inverters

Post by Cactus » Sun, 10 Mar 2019, 13:13

Thanks for the detailed reply Weber.

It is indeed a MKS 4K-48 as you assumed. I guess I'll just have to live with the buggy, limited capability factory firmware for now as I can't afford to replace the unit should I brick it by experimenting with your patched firmware with no way to reload the original version if I don't come right, very jealous of you lucky guys that have the use of the patched firmware and all the wonderful features that come with it.
Maybe one day when I have more money to throw at it I'll give it a bash (brick or not) and let you know what happens.

Regards.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by suorama » Wed, 13 Mar 2019, 15:23

Hi, every one =)
Greets from Finland.

I have two PIP-4048MS units at parallel at the moment. Those are worked nicely since 27.4.2017. There is FW 73.00 if I remember right.
My new plans was to upgrade my system to 3-phase version. After that I can feed my whole house thru solar system.
Well, I cannot find anymore that same version, so I decide to buy totally new ones. Maybe I make a mistake...
I contact directly to MPP Solar and ask if they have that old one at least one left, well no.
Then I ask if they can recommend some to me and they say that PIP-5048MK is newest and would be longer on the market, so if I need one (or more) more later, it is better chance to get those...

Well, I try search if someone have experiences with that new MK series, but there is only two messages with 5048MK key words...
So, maybe I must start telling experiences after I got those. Maybe that happen next week.

Of course, if someone have these, it would be nice to hear how all going =).

There is at least manual link of that MK series http://www.mppsolar.com/manual/PIP-MK%2 ... 181106.pdf

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Wed, 13 Mar 2019, 15:58

suorama wrote:
Wed, 13 Mar 2019, 15:23
Hi, every one =)
Greets from Finland.
Welcome to the forum.
I have two PIP-4048MS units at parallel at the moment. Those are worked nicely since 27.4.2017. There is FW 73.00 if I remember right.
My new plans was to upgrade my system to 3-phase version. After that I can feed my whole house thru solar system.
Paralleling old and new machines is quite tricky. The only success that I know of is 72.70 on the old, and 74.10 (or later) on the new. That means you can't run patched firmware, and you can't have the 64 V option.
Well, I cannot find anymore that same version, so I decide to buy totally new ones.
That seems a bit drastic. But if you do, I'd suggest getting 64 V models, if you want the option of running patched firmware.
Maybe I make a mistake...
Well, I try search if someone have experiences with that new MK series, but there is only two messages with 5048MK key words...
I'm sure that there are plenty of 5048 models out there. Perhaps search for the Axpert MKS 5K-48 (not the MKS II), which is a more common name for the same thing.
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-4048MS and PIP-5048MS inverters

Post by suorama » Wed, 13 Mar 2019, 17:46

coulomb wrote:
Wed, 13 Mar 2019, 15:58
Welcome to the forum.
Thank you!
Paralleling old and new machines is quite tricky. The only success that I know of is 72.70 on the old, and 74.10 (or later) on the new. That means you can't run patched firmware, and you can't have the 64 V option.
That is understood.

That seems a bit drastic. But if you do, I'd suggest getting 64 V models, if you want the option of running patched firmware.
Yes, those MK 48V versions can do that 64V, but firmware... not yet, I guess?
I'm sure that there are plenty of 5048 models out there. Perhaps search for the Axpert MKS 5K-48 (not the MKS II), which is a more common name for the same thing.
What I think which is similar is http://voltronicpower.com/en-US/Product ... -3KVA-5KVA. At least it looks like same and specs are same.

But I understand you mean, if I still look those older ones. Well, I got those MPP Solar PIP-5048MK marked about the same price than MS version. There was only 17,65€ diffrence (by three).
I can sell my 4048MS units to forward, I have buyers already, but I can also use these units to charge my Leaf ;). Of course that 22A per phase also is enough because I have Accelev and it can combine two phase to one 250Vac. By now my utility feeds a 3 x 25A, so difference is not that much.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Wed, 13 Mar 2019, 21:41

suorama wrote:
Wed, 13 Mar 2019, 17:46
What I think which is similar is http://voltronicpower.com/en-US/Product ... -3KVA-5KVA. At least it looks like same and specs are same.
Arrgh, by bad. MK, or Axpert King, it didn't click with me.

We have no firmware for the MK / King model, so no patched firmware is available for them as yet. So you've bought three of those now?
I have Accelev
Interesting product. I don't know if you can set up two PIPs to feed two phases to your Accelev; I suppose it might work, but I have a suspicion it will throw an error if it can't see three machines.
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-4048MS and PIP-5048MS inverters

Post by suorama » Fri, 15 Mar 2019, 19:50

coulomb wrote:
Wed, 13 Mar 2019, 21:41
Arrgh, by bad. MK, or Axpert King, it didn't click with me.

We have no firmware for the MK / King model, so no patched firmware is available for them as yet. So you've bought three of those now?
Yes I did, but maybe I can handle that without patch at first =)
Interesting product. I don't know if you can set up two PIPs to feed two phases to your Accelev; I suppose it might work, but I have a suspicion it will throw an error if it can't see three machines.
Accelev uses only two phases. So it take that 400V in to the transformer to out 250V from sec. So with 2 x 16A you can use 1 x ~32A current and 6,6kW charger. My use only ~14A from that 250V, because my Leaf have 3,6kW charger. But that 250V helps a bit. My car fill littlebit faster than 3,3kW. Maybe not 250V X 16A = 4kW but appr. that promised ~3,6kW power. When Battery is quite low (like only 0,5kWh remain), then first few kilowatthours go with 4,4kW power.
So, when I got that 3-phase system to work, it must work like now. It stress two pips but smaller current than if I got all from one. Maybe there is too much losses. But now it is easier to follow, I guess. (I have also that one phase 16A charge control box too to compare.)

edit:
What I mean with that if I save my 4048MS units, I can use one or two (parallel) to my charge. Of course PIP's give error code if there is not that third machine.
But I can still use that Accelev with new configuration. And if it behave nicely, it will help that 3,3A less current (~760W) what I got when use new ones.
As I say, our feed is now 3 x 25A, that means 17,25kW, after PIP-5048MK x 3 I got 15kW max power. So that is 2,25kW less (750W / phase).
So if I take 3600W from one phase, I must look better than before what I use at same time. But If I can divide that to two phase, then there is more room to use another things like before =).
Ok, maybe there is too much losses, so I just need to look what happens...

edit2:
I measure first time that Accelev better...
Just now we have 395,2Vac between phases and Accelev take 9,4A, so power is 3715W. Accelev feeds to car 247Vac and 14,6A. That takes 3606W. So 109W goes to transform. That is about 97% eff. Not bad I think.
So, that 3715W means about 16,15A if there is 230V phase, so that Accelev stress two 230V phases about 8,08A.

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Re: PIP-4048MS and PIP-5048MS inverters

Post by suorama » Wed, 20 Mar 2019, 02:10

Today I got my trio. I will take pic when those is installed. Or do you want something more? ;)
All my PIP-5048MK units is marked to made 11 2018. So, are those pretty first product ones?
I opened those today only to add parallel cards, but what I notice there is ferrite ring with that RJ45 cable to display unit. I think I do not see that when I found pics of these units with removable display. Maybe not markable thing but now it noticed =).

That is one of my units type shield. (So, at least one picture =D )
Image
That 22A should mean 21,74A? 5000W / 230V. What if I set 240V? Can I then get 5280W or if I set 220V could I get then 23A?
What I mean, what is "the main parameter". It is power? If it is, then 220V gives me more amperage (or 240 stress less wires with lower amperage). If it's amperes, then higher voltage gives me more power. 230V and 22A makes 5060W. Maybe I test all of these in future =).

If there is 64V possibilities. Do that mean, I can use 54V battery (27 x 2V = 54V or 27 x 2,37V = 63,99V)?
So If I bought 24 x 2V@1000Ah battery I got 48kWh energy store.
Instead of that I can buy 27 x 2V@1000Ah battery and got 54kWh?

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Re: PIP-4048MS and PIP-5048MS inverters

Post by coulomb » Wed, 20 Mar 2019, 09:24

suorama wrote:
Wed, 20 Mar 2019, 02:10
All my PIP-5048MK units is marked to made 11 2018. So, are those pretty first product ones?
No, I think they've been around for well over a year. Also, yours is PF1 (5 kW), the first ones were PF0.8 (4 kW).

Also, you seem to have PWM models (MK versus MS). Is that what you intended? [ Edit: Ugh! Brain spasm! I'm confusing model letters. Sigh. ]
That 22A should mean 21,74A? 5000W / 230V.
Yes, rounded to the nearest ampere.
What if I set 240V? Can I then get 5280W or if I set 220V could I get then 23A?
The limits all seem to relate to power. I believe you will get almost 23 A at 220 V.
If there is 64V possibilities.
Yes, by using a higher voltage battery, you are able to store more energy than a lower voltage battery of the same Ah rating. [ Edit: but generally MPP Solar use only 64 V models when both are available from the manufacturer. So that suggests that there aren't any 64 V models to be had. ]

But then you are closer to the maximum voltage that the battery-side MOSFETs can handle. Remember that a major failure mode with these inverters is the capacitors ageing and the battery-side MOSFETs blowing up due to over-voltage spikes.
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-4048MS and PIP-5048MS inverters

Post by suorama » Wed, 20 Mar 2019, 13:42

coulomb wrote:
Wed, 20 Mar 2019, 09:24
No, I think they've been around for well over a year. Also, yours is PF1 (5 kW), the first ones were PF0.8 (4 kW).

Also, you seem to have PWM models (MK versus MS). Is that what you intended?
That MK serie is new one if we speak MPP Solar PIP series. There is not PF0.8 MK machines at all. MPP Solar says that MK is this year new product (and that why I think if those is maybe ones of the first units =) ). But of course if these is selled over the year already, I got wrong information from MPP Solar.

If I remember right, example HS is PWM model and MS is MPPT model. That M marks MPPT and S maybe Serie (or not). K means instant switching between sources.
So, that MK mean Zero transfer time 5000w Solar inverter 230vac 48vdc + 80A MPPT solar charger + battery charger 60A with bluetooth feature.
Yes, by using a higher voltage battery, you are able to store more energy than a lower voltage battery of the same Ah rating. [ Edit: but generally MPPSolar use only 64 V models when both are available from the manufacturer. So that suggests that there aren't any 64 V models to be had. ]

But then you are closer to the maximum voltage that the battery-side MOSFETs can handle. Remember that a major failure mode with these inverters is the capacitors ageing and the battery-side MOSFETs blowing up due to over-voltage spikes.
Ok.
MPP Solar says that equalization charge is 64V and max. DC voltage is 66V. Quite little marginal indeed. So, it would be better to use normal 48V nominal voltage system to save units. That 2.667V per cell is pretty much the max. what can use (16V @ 12V) to equalization.

Here is the link to aliexpress where I bought mine. PIP-5048MK
If someone is interested of features.

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