My 60A PowrMr charge controller just arrived.

We are getting there gradually... ...na panels just remain...

eleojo23:


You are about to usher in Round 5 (or is it round 10 sef) of the lead acid Vs lithium debate.

Lol

ceaser:
Please how much is a spent 12v100ah lead acid battery sold for? I may have one to discard.

About 6-7k....

Trippledots:


Can you clean large panel install of between 80- 130panels?

If yes, hit my signature lets talk pls

I'm not sure cleaning panels is a good idea unless it is in an easily accessible place where you can clean them regularly. In not more than 2 weeks, the dust would have piled up again.

ceaser:
Please how much is a spent 12v100ah lead acid battery sold for? I may have one to discard.

Depends on the weight...if up to 30kg you may get up to 10k

incogni2o:


How many story building

and Location.

Sorted out already... Thanks tho

adrusa:



I'm not sure cleaning panels is a good idea unless it is in an easily accessible place where you can clean them regularly. In not more than 2 weeks, the dust would have piled up again.

I get you jare. Thanks

My 4kva 48v mustpower inverter appears to have developed fault,

Intermittently the output flickers for several seconds and it will make violent sounds, the closest sound to it is the sound it makes when its trying to power a load wirh a huge surge, such as ac or sumo.

As this is happening, the cooling fan will turn on, and the load % display will flicker from the normal 10% it was to 30 or even 40% for a few seconds and then everything normalizes again.

This could then repeat again next 15mins or 30mins or 1hr.

I have disconnected the load, and observed it. It doesnt behave like that on zero load.

Does any body have an idea, what could be wrong.
It was deployed in 2016 and has served me wella Since

earthrealm:
My 4kva 48v mustpower inverter appears to have developed fault,

Intermittently the output flickers for several seconds and it will make violent sounds, the closest sound to it is the sound it makes when its trying to power a load wirh a huge surge, such as ac or sumo.

As this is happening, the cooling fan will turn on, and the load % display will flicker from the normal 10% it was to 30 or even 40% for a few seconds and then everything normalizes again.

This could then repeat again next 15mins or 30mins or 1hr.

I have disconnected the load, and observed it. It doesnt behave like that on zero load.

Does any body have an idea, what could be wrong.
It was deployed in 2016 and has served me wella Since

Have you considered that the issue may be external to the inverter? I suggest a gradual introduction of load to determine the load source that may be sending an occasional surge to the inverter

odimbannamdi:
My 60A PowrMr charge controller just arrived.

We are getting there gradually... ...na panels just remain...

I know the seller you got this from.

He is the only one that includes a pair of MC4 connectors in his PowMr CC pack.

By the way, I recently experienced an unusual disheartening performance form the use of this CC in its use with LFP. Although it was later addressed and the problem was just with one out of like 5 units I have worked with. So you may want to watch out for that.

Last time I used the CC with LFP, the problem started on the first day system went online. Panel config is 320 watts 2s2p on 24v105ah LFP, 1.5kva PSW inverter.

The inverter started acting up, switching off and on, and the digital meter reading on the battery begun to fluctuate from 29v to 32v, then back to 25v, to 29v and like that all over rapidly. The fluctuations also coincides with the inverter acting up. This problems is not reproducible when the DCB from panel to CC is flipped to off (when no charging current flows into the CC from the panels) or even the system is in use overnight/early mornings before the sun is high.

My conclusion then was that the CC was messing up by not being able to quickly throttle down and peg the inrush voltage and current to the user preset float of 28v once the battery gets full but goes as high as 30v and the BMS protect of the LFP kicks in to protect the battery by tripping off when incoming voltage gets to 29v; and because there is still a communication between the CC output and inverter input, the inverter too senses the voltage of 30v (its high voltage protect level) and switches off appropriately.

The solution was to reduce the float of the CC to 27.5v so that the battery when fully charged does not go beyond 27.4v at most. Everything has been working fine for about six weeks now.

This problem.did not happen with the other CCs in use and I even had to bring in a used PowMr I had lying around in the course of trouble shooting, but still couldn't recreate the scenario.

saint2ace:



About 6-7k....

Thanks a lot. Make I go bundle am for inside car straight.

mctfopt:


Depends on the weight...if up to 30kg you may get up to 10k

These guys I carry am to no dey weigh am o. They just look at it and tell you how much dem go pay. I am used to their rates on used car batteries but I want to avoid getting swindled with this inverter battery, reason I quickly sought advice here. It's one of the batteries I gave out to neighbours when I went Lithium. Battery has done its job for a couple of months and the user purchased a new replacement. But he knows that spent batteries can be sold and so he brought it back to me to sell and make some money saying that that is the least he could do in appreciation.

The 75Ah car battery is usually 2k5 and the 45ah usually 2k.

earthrealm:


Scroll back last 15 pages, this issue was exhaustively treated



Kie kie and a few other sellers stocked them b4.
Diy plug n play display units
Aliexpress isnt so bad now, within 1 month, you should get your item

Ok thanks alot

saint2ace:



If u're in Lagos, u can get it at arena bolade oshodi for about 1k per piece. But if u're not in a hurry AliExpress should be ur go to, as u can get various modules with volts, amps etc. Na ur money kill am.....

Thanks am in lagos

ojeysky:


If all you need is a unit and you are in ado-ekiti you can grab the one I used in the past

Thanks alot. Would have loved that but am in Lagos.

ceaser:


I know the seller you got this from.

He is the only one that includes a pair of MC4 connectors in his PowMr CC pack.

By the way, I recently experienced an unusual disheartening performance form the use of this CC in its use with LFP. Although it was later addressed and the problem was just with one out of like 5 units I have worked with. So you may want to watch out for that.

Last time I used the CC with LFP, the problem started on the first day system went online. Panel config is 320 watts 2s2p on 24v105ah LFP, 1.5kva PSW inverter.

The inverter started acting up, switching off and on, and the digital meter reading on the battery begun to fluctuate from 29v to 32v, then back to 25v, to 29v and like that all over rapidly. The fluctuations also coincides with the inverter acting up. This problems is not reproducible when the DCB from panel to CC is flipped to off (when no charging current flows into the CC from the panels) or even the system is in use overnight/early mornings before the sun is high.

My conclusion then was that the CC was messing up by not being able to quickly throttle down and peg the inrush voltage and current to the user preset float of 28v once the battery gets full but goes as high as 30v and the BMS protect of the LFP kicks in to protect the battery by tripping off when incoming voltage gets to 29v; and because there is still a communication between the CC output and inverter input, the inverter too senses the voltage of 30v (its high voltage protect level) and switches off appropriately.

The solution was to reduce the float of the CC to 27.5v so that the battery when fully charged does not go beyond 27.4v at most. Everything has been working fine for about six weeks now.

This problem.did not happen with the other CCs in use and I even had to bring in a used PowMr I had lying around in the course of trouble shooting, but still couldn't recreate the scenario.

Oga do you have any of those your PowMr CC available for sale!!I am interested if price is right.I have placed order for one but it might not get here on time.

ojeysky:


Have you considered that the issue may be external to the inverter? I suggest a gradual introduction of load to determine the load source that may be sending an occasional surge to the inverter

HV CONSIDERED THAT,a small intermittent short circuit may be cauing it.
a knife switch that transfers the load to nepa/grid, the flickering doesnt happen on nepa/grid....maybe cos the short circuit isnt so much, as it causes only 40% load spike on the inverter. will try the gradual load introduction and see what happens.

ceaser:


I know the seller you got this from.

He is the only one that includes a pair of MC4 connectors in his PowMr CC pack.

By the way, I recently experienced an unusual disheartening performance form the use of this CC in its use with LFP. Although it was later addressed and the problem was just with one out of like 5 units I have worked with. So you may want to watch out for that.

Last time I used the CC with LFP, the problem started on the first day system went online. Panel config is 320 watts 2s2p on 24v105ah LFP, 1.5kva PSW inverter.

The inverter started acting up, switching off and on, and the digital meter reading on the battery begun to fluctuate from 29v to 32v, then back to 25v, to 29v and like that all over rapidly. The fluctuations also coincides with the inverter acting up. This problems is not reproducible when the DCB from panel to CC is flipped to off (when no charging current flows into the CC from the panels) or even the system is in use overnight/early mornings before the sun is high.

My conclusion then was that the CC was messing up by not being able to quickly throttle down and peg the inrush voltage and current to the user preset float of 28v once the battery gets full but goes as high as 30v and the BMS protect of the LFP kicks in to protect the battery by tripping off when incoming voltage gets to 29v; and because there is still a communication between the CC output and inverter input, the inverter too senses the voltage of 30v (its high voltage protect level) and switches off appropriately.

The solution was to reduce the float of the CC to 27.5v so that the battery when fully charged does not go beyond 27.4v at most. Everything has been working fine for about six weeks now.

This problem.did not happen with the other CCs in use and I even had to bring in a used PowMr I had lying around in the course of trouble shooting, but still couldn't recreate the scenario.

By doing that you have actually addressed another problem; floating LFP at high voltages is not good for the lifespan of the cells. I float mine at 27v

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ojeysky:


By doing that you have actually addressed another problem; floating LFP at high voltages is not good for the lifespan of the cells. I float mine at 27v

i thought LFPS shudnt be floated at all, all form of charging should stop once battery is full.
is the cheap a,ss powmr cc capable of doing it successfully.

Fams please forgive my digression but can a 3000va voltage stabilizer effectively run a 1100 to 1300watts window unit 1hpAC?

earthrealm:


i thought LFPS shudnt be floated at all, all form of charging should stop once battery is full.
is the cheap a,ss powmr cc capable of doing it successfully.

It should not be floated at all but some chargers don't have the option of not setting a float hence a lower voltage float is better. If powmr truly has LFP charging profile then no float is due

ceaser:


I know the seller you got this from.

He is the only one that includes a pair of MC4 connectors in his PowMr CC pack.

By the way, I recently experienced an unusual disheartening performance form the use of this CC in its use with LFP. Although it was later addressed and the problem was just with one out of like 5 units I have worked with. So you may want to watch out for that.

Last time I used the CC with LFP, the problem started on the first day system went online. Panel config is 320 watts 2s2p on 24v105ah LFP, 1.5kva PSW inverter.

The inverter started acting up, switching off and on, and the digital meter reading on the battery begun to fluctuate from 29v to 32v, then back to 25v, to 29v and like that all over rapidly. The fluctuations also coincides with the inverter acting up. This problems is not reproducible when the DCB from panel to CC is flipped to off (when no charging current flows into the CC from the panels) or even the system is in use overnight/early mornings before the sun is high.

My conclusion then was that the CC was messing up by not being able to quickly throttle down and peg the inrush voltage and current to the user preset float of 28v once the battery gets full but goes as high as 30v and the BMS protect of the LFP kicks in to protect the battery by tripping off when incoming voltage gets to 29v; and because there is still a communication between the CC output and inverter input, the inverter too senses the voltage of 30v (its high voltage protect level) and switches off appropriately.

The solution was to reduce the float of the CC to 27.5v so that the battery when fully charged does not go beyond 27.4v at most. Everything has been working fine for about six weeks now.

This problem.did not happen with the other CCs in use and I even had to bring in a used PowMr I had lying around in the course of trouble shooting, but still couldn't recreate the scenario.

Wow! This is some information! Thanks for point these out. I will be going fully solar before February next year. I will make sure to watch out for this. Thanks baba

tonididdy:
Fams please forgive my digression but can a 3000va voltage stabilizer effectively run a 1100 to 1300watts window unit 1hpAC?

I think so

tonididdy:
Fams please forgive my digression but can a 3000va voltage stabilizer effectively run a 1100 to 1300watts window unit 1hpAC?

Theoritically, it can, however its dependent on how low your voltages get to. If above 170v, you should be fine. But the demands on the stabilizer due to start up surge could cause the stabilizer to malfunction or fail prematurely.

If you hv no choice, try to start the ac, only when the nepa voltage is upto 160/170v

ceaser:
But he knows that spent batteries can be sold and so he brought it back to me to sell and make some money saying that that is the least he could do in appreciation.

Great guy. I like his attitude.

odimbannamdi:
My 60A PowrMr charge controller just arrived.

We are getting there gradually... ...na panels just remain...

Bro, how much did you buy this Charge Controlle

And Where did you order from?

How long did it take to arrive??

odimbannamdi:
My 60A PowrMr charge controller just arrived.

We are getting there gradually... ...na panels just remain...

Congrats my man.

ojeysky:


Have you considered that the issue may be external to the inverter? I suggest a gradual introduction of load to determine the load source that may be sending an occasional surge to the inverter

I forgot, when grid is on. This issue doesnt happen, and we know how the inverter works, with grid on.. it simy bypasses without inverting.. this alone makes me feel its the inverter that has the issue

omotoda:


Oga do you have any of those your PowMr CC available for sale!!I am interested if price is right.I have placed order for one but it might not get here on time.

Nope bro. No new one. The only one available is used one which is actually reserved for stop gaps like the scenario I described above.

earthrealm:


HV CONSIDERED THAT,a small intermittent short circuit may be cauing it.
a knife switch that transfers the load to nepa/grid, the flickering doesnt happen on nepa/grid....maybe cos the short circuit isnt so much, as it causes only 40% load spike on the inverter. will try the gradual load introduction and see what happens.

See ehn, please look for the problem fast. If it's a short circuit, make it faster please. Remember the scenario I narrated few posts back of two killed inverters I wirnessed, it was a sad one. One of the damaged inverters was mine I loaned out to the chap. It turned out that the problem was the wall socket that fed the inverter power into the house. The socket was bad and I suspected some of the terminals were loose and causing repeated sparks inside it that fed back into the inverter. This did not happen after a single insult, but it spanned over about 48hrs of such repeated insult on the inverters.

The suspicion was confirmed when a third inverter was brought in. The power didn't enter the house when it was installed. I guess the terminals had finally gotten loose. The socket was changed to a new one and the third inverter brought in has not given issues.

Ògá Niyi gave the insight into the problem likely being a short circuit or the use of pressing iron on the inverter. When I queried that using generator in that house was hitch free, he said something about generators being powerful enough not to succumb to little of such insult wherease inverters when subjected to such might not do well on it. So your inverter on PHCN bypass may do well with the insult but maybe not when on the inverter directly.

ojeysky:


By doing that you have actually addressed another problem; floating LFP at high voltages is not good for the lifespan of the cells. I float mine at 27v

Not around now but I'll inform 'em to have that addressed. Thanks.

But what about Li-on 18/65/0s, can that be ok float at the max recommended voltage (4.15v)?

earthrealm:


i thought LFPS shudnt be floated at all, all form of charging should stop once battery is full.
is the cheap a,ss powmr cc capable of doing it successfully.

The CC has dedicated lithium charging settings but the voltages are user editable. Lead acid battery settings has bulk and float settings. But the moment you select Lithium charging profile, the bulk and float becomes redundant and you will be required to set the highest charging voltage. I'm now not sure if that voltage keeps it in float, but what I know is that if full, it remains at that set voltage until the sun retires for the day.

mctfopt:


Great guy. I like his attitude.

I was impressed too.

By the way, I eventually made 6k5 out of the battery. Thanks for the heads up from saint2ace and mctfopt. The guy wan pay 5k, na hin I do strong head for 7k, even telling him say make him bring scale come weigh am say if e reach 30kg I no go sell am less than 10k . Guy quickly gree for 6k5.