Search found 2688 matches

by weber
Wed, 15 Jan 2020, 12:13
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 206
Views: 20880

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

LiFePO4, was, possibly, a better option. :roll: I though they may not last as long as NiFe. Who knew? Even good quality LiFePO₄ will definitely not last as long as good quality NiFe. I have a fair amount of manuals for NiFes. :lol: Of course. That was for others who might be reading along. To show ...
by weber
Wed, 15 Jan 2020, 10:26
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 206
Views: 20880

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

Hi dRdoS7 , Yes, NiFe is an unusual case, due to the huge hysteresis between charge and discharge. I see recommended absorb and float voltages of 1.65 V and 1.45 V per cell, so yes, I think 38 cells would be a better choice than 40 cells. You should still be able to get most of the charge out of the...
by weber
Tue, 14 Jan 2020, 11:11
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

I have tempered my earlier conclusion that the 64 V variants of these inverters are an abomination. See this post in a different thread.
by weber
Tue, 14 Jan 2020, 10:57
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 206
Views: 20880

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

I'd like to retract, or at least modify, what I wrote here . When I wrote that the 64 V variants are an abomination, I was thinking as an electronics designer. I would never design something like that — a 48 V sine-wave inverter that clips below 48 V. But hey, we're not buying these inverters becaus...
by weber
Tue, 14 Jan 2020, 09:37
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP inverter repairs and hardware modifications
Replies: 450
Views: 28986

Re: PIP inverter repairs and hardware modifications

I suggest replacing the DC-side bypass capacitors with longer life units. Thank you coulomb. How can we identify a longer life capacitor? What are specification? Please explan with detail. I agree with what Coulomb says, but would like to add a few things. I prefer to call them the "battery-side DC...
by weber
Sun, 12 Jan 2020, 09:54
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 441
Views: 60369

Re: Low cost BMS

Coulomb and I have had good success with Electrolube HPA conformal coating on our cell-top management units. It doesn't add much to the cost.
https://au.element14.com/electrolube/hp ... %20coating
by weber
Sun, 12 Jan 2020, 09:42
Forum: Admin Notices
Topic: Online membership form
Replies: 4
Views: 287

Re: Online membership form

Chris, I believe Dylan is referring to the AEVA web site, not the forum. Only Rob can deal with that.
by weber
Mon, 06 Jan 2020, 21:21
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 384
Views: 60272

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

Hi gyrovague . I know of no other threads on this topic, in any other forums, apart from the few already linked above: Whirlpool, South African Power Forum and DIY Electric Car. I know of no further evidence. But I also don't think any is required. The voltage versus charge curve, and the overheatin...
by weber
Sat, 28 Dec 2019, 10:20
Forum: Renewable Energy and Storage (Non-EV)
Topic: Interworking a Sunny Island with a Redflow Flow battery
Replies: 10
Views: 455

Re: Interworking a Sunny Island with a Redflow Flow battery

hyphenated Welcome to the forum. Can you explain why you say, "I find the use of Lithium chemistry for a daily charge and deep discharge absolutely idiotic, and am prepared to pay a premium to get something with at least ten years of functionality." There are 5 or so different lithium chemistries r...
by weber
Mon, 23 Dec 2019, 11:22
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 30
Views: 3034

Re: How to tell a kilowatt hour from a kelvin week henry

Wow. Thanks for that, Patrick. They could hardly have got it any wronger. If you're an RACV member, it would be good to email them about it. I'm sure they don't want to be wrong any longer than they have to. At least they got megajoules right. :)
by weber
Mon, 23 Dec 2019, 08:13
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

When i push the flash button in the Axpert Reflash, the WR display show UPG YES. 10 seconds after error code in the Software, the display looks like before. It looks like it wants you to push a button on the inverter's display unit, possibly the one beside the word "YES", to confirm that you want t...
by weber
Sat, 21 Dec 2019, 06:43
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

Since there is a hint at the download: Do not use with clones, only with genuine Voltronic Power manufactured machines. Otherwise, fault F90 is likely after a couple of months of runtime. Will I get this issue when flashing a 5048MK with this firmware? The machines sold by MPP Solar, including the ...
by weber
Tue, 10 Dec 2019, 17:08
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

Hi @XtractorFan. Sorry to hear what a hard time you had, but thanks for sharing it in such detail, so others are forewarned.
by weber
Tue, 10 Dec 2019, 16:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 206
Views: 20880

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

I have read that the theoretically 18A limitation on the solar array input is just the maximum that the inverter is going to take, BUT isn't the MPPT algorithm going to short circuit the panels once in a while for testing the maximum power possible? Maybe the 18A limitation is due to that short cir...
by weber
Sat, 23 Nov 2019, 08:26
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

A brilliant response, Coulomb!
by weber
Tue, 19 Nov 2019, 08:51
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

I agree with Coulomb. 145 V is an absolute maximum limit for array open-circuit voltage. You need to know the coldest dawn panel temperature you can expect at midwinter in your location and use it to adjust the panel's datasheet Voc (which is at 25 °C) using the datasheet temperature coefficient of ...
by weber
Sun, 17 Nov 2019, 10:31
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

@Lee I suggest anyone hoping for solutions to the various problems with Axpert Kings should also keep and eye on the South African Power Forum, in topics such as this.
Axpert King - can't stop it charging from utility
by weber
Thu, 14 Nov 2019, 13:23
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

Welcome Lee . I'm sorry it has taken me so long to reply. Unfortunately, Coulomb and I cannot make any changes to the firmware beyond those offered above, as we do not have an MK/King for testing. This also makes it difficult to answer any questions about the inverter's behaviour and how this might ...
by weber
Thu, 14 Nov 2019, 09:25
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

I'd state the conclusion a bit differently from Coulomb. I'd say the 64 V models are an abomination. They claim to work with nominally 48 V lead-acid batteries, and they claim to be pure sine wave. And yet they can't even produce a pure sine wave at 48 V, if they have any kind of load on them. [Edit...
by weber
Wed, 13 Nov 2019, 07:30
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

I have a new question however. The new guy is on firmware U1 74.31 Do I still flash PB1_72.70b to both the 5KW and 4KW in order to parallel them? The new inverter also shows U2 04.12. Can I leave that as is? My PV array only connect to this inverter. For some reason I get no PV readings on the othe...
by weber
Tue, 12 Nov 2019, 15:23
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

Hi Mantas . If you want to have any chance of paralleling the new machine with the old ones, you must not buy a 64 V machine. That means you must not buy a PIP-5048MS. You need an Axpert MKS 5K that does not have the 64 V option, or a rebadged equivalent such as the Mecer SOL-I-AX-5P (not the SOL-I-...
by weber
Tue, 12 Nov 2019, 09:05
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

@Mantas I just realised you have another (and better) option, that doesn't require you to reflash the new clone. You can reflash the old inverter(s) with the same firmware that is in the clone, which I assume is LC1_72.70c.
by weber
Tue, 12 Nov 2019, 07:04
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-4048MS and PIP-5048MS inverters
Replies: 2569
Views: 539003

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

Hi Mantas . Welcome to the forum. Thanks for giving all the needed detail up front, to enable us to help you. The replacement you have been supplied with, is not a rebranded Voltronic Power Axpert MKS 5K but a pirate copy or "clone". See Coulombs post: Do I Own a Clone? (Oh, moan!) . And I'm guessin...
by weber
Mon, 11 Nov 2019, 10:26
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 209
Views: 20194

Re: PIP-5048MK inverter

Thanks for this weber. Do you mean with the remark above other LFP's not being Pylontech, like 16s ones? Yes. The LFP flavour of patched firmware would be for LFPs other than Pylontech, whether 15S or 16S. It would also be for Pylontech if the inverter was made in 2018 and so could not communicate ...
by weber
Mon, 11 Nov 2019, 08:21
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048GE, PIP-5048GK and PIP-5048MG inverters (with unsafe SCC)
Replies: 206
Views: 20880

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

So despite the considerable gap from 71.40 to 71.71, it looks like it should work. I presume your model, being a PIP, has the 64 V option? (In other words, can setting 26 go past 58.4 V?) Yes, and I don't know of 5048 MG versions which don't do 64V, as they are quite recent, do you? When a model ha...