₦airaland Forum

eleojo23:
It's not me o.

Are you talking about feflo?

Oh sorry... I don forget the guy name. But you also do the packs. You can contact the person.

I'm only referring tho, im not guarantying either seller or buyer pls.

econome:
My suoer 30a charger no longer working

Please, what could be the problems? It became so hot lastnight before it gave up the ghost

A radionic/repairer said it is the IC(if I am correct)

What could be the problem and solutions?

Hi, pls was it this particular model you had that got burnt? I mean the analogue type?

hausadreturn:
What's the name?/

Its assembled by the guy selling it.

generationz:
Which one?

I linked her to the pack seller here. I think his monicker is eleojo or so.

hausadreturn:
I need a good power bank for charging my laptop. Which one do you use, or can you recommend?

I recommended one for someone who contacted me some weeks back. Its one of these lithium packs, and the person hasn't given me a complete feedback. But i think its working because if e no work e for don knick my door tey tey.

Wow... Fangpusun is a solid mppt controller.
Two laptop power supplies have paid the ultimate price for science tho

This controller is sha solid so far; does true mppt tracking.

NiyiOmoIyunade:
A manual charger - those basic ones that simply feed an AC waveform through a rectifier circuit to produce DC voltage.

Manual because they are not smart and have no DC regulation or cutoff - they simply keep putting out a fixed voltage and current into the battery so you have to manually terminate the charge once you have determined the battery is fully charged else battery go swell.

I had one of those and used an MPPT CC to regulate the output voltage of the charger - sort of to simulate a regulated 3 stage charge - I cannot say for certain how well it went as I quickly determined that the battery I was trying to salvage was beyond repair and ended the experiment.

I do remember though that a PWM CC I had did not even pass through the voltage to battery when I connected the manual charger to the PV input of the CC.

Oh ok.... I get that now.


Interesting. I have been using a cheap pwm with a battery of laptop chargers to charge my battery for months now. It did charge the battery, but i noticed when the battery got to float, it still allowed a sizeable amount of current to pass through to the battery. Since power supply here is very epileptic i didn't bother about it since i would be lucky if the battery hit float before we had a power cut.

So curiosity get the better of me eventually and i have my answers now..

Armed with niyiomolunade s reply i
1. Took a laptoolp power supply rated at 24v/2.5A
2. Using a clamp i momentarily shorted the output to see how the adapter itself behaves in a dead short. I noticed it simply cuts supply once amps reaches about 2A for about 1sec then resumes again. Repeating the same process if the same condition persists.

3. Armed with this new information, i connected the laptop charger to the PV input of my expensive fangpusun 100v/30amps mppt controller.

Result

Controller mppt control showed battery charging at 13.3v/ 5-6A.

Since the laptop power supply is rated at about 2A, it was apparent the mppt was doing a buck conversion and charging the battery.

So my curiosity satisfied at last!

I love Science!

Next is to use a higher regulated I/V to feed the mppt controller and see what happens as it tracks that mpp.

Cheers.

NiyiOmoIyunade:
Somebody here once tried this - I think his NL moniker was @Sinistrian or so - he fed his Zinox hybrid's PV input with the output of another MPPT CC.

Really? I'll go look for him

When I think about it and based on similar experiments I have tried using an MPPT CC to modulate the output of a manual battery charger, my conclusion is that an MPPT CC can take any DC input within it's voltage range - the issue is with the DC power source being able to handle a variable load as the CC varies its internal electrical profile (not sure the right term is 'resistance') to pull more or less current

Nice... This is basically the kind of info i need. What do you mean by manual though?

Tolerate the maximum current draw the MPPT may impose from time to time (current limiting ability inside the MPPT may be desirable)

Very true this. I am thinking a fuse rated at about half the current rating of the charger should do the trick incase the mppt wants to pull too much current. What dyu think?

The DC power source feeding the MPPT input has to be able to

1) Generate and sustain the required MPPT operating voltage

2) Tolerate the maximum current draw the MPPT may impose from time to time (current limiting ability inside the MPPT may be desirable)

3) Tolerate the very variable load profile the MPPT will present as it sweeps to find a sweet spot.

Thank you so much for your incisive input always egbon.

mank1234:
There are cheap mppt controllers on aliexpress. You can get one and try, if no one is willing to donate.

Yeah, thats a point. But the few "cheap" ones i know of seem to simply do a buck or conversion. I'm not so certain their mppt algorithms are shock proof like more expensive ones_maybe anyone willing to join spare cash with me to purchase one should indicate....Learning new stuffs gives me a special kind of high, but cash is limited jare.

Talking abt the cheap ones tho, I'll appreciate a link to check and see if its within my pocket's reach.

Thanks for the input bro... �

@chris @niyiomolyunade and other DIYers

Can an mppt controller be fed with a regulated DC supply? I have read conflicting ideas on how it will perform. Some say the algorithms that mppt devices operate with may cause it to self-destruct or destroy the power supply. Others say it should work as long as the the power supply has some current limiting feature in it's design.

There isn't any practical video or article about it i could lay my hands on.

So what dyu guys think?

And anyone who has an mppt controller that they don't mind sacrificing for science I'll like to see a practical demonstration of such connection. I dnt mind collecting and carrying out the experiment myself if the donor prefers it that way.

ceaser:
Thanks. But unless it is stated on the item package or the name plate, don't you think it will still require some tearing down to be able to tell what type of motor is inside?

If you tear down Person market e fit tear you slap... But yh, thats a sure way to see the insides of anything

ceaser:
Thanks. But unless it is stated on the item package or the name plate, don't you think it will still require some tearing down to be able to tell what type of motor is inside?

Lol... Well, you are right.

But, a smart way is to Just turn it on while listening to an fm radio next to the engine area. The unmistakable statics should be there.

Also i think if they do use a brushless DC (bdc) motor, it will vebe written somewhere on the body.

olaolu11:
I took this battery from a ups and connected it to my panel to watch a program. The following morning i left it to charge while my wife watch tv. Unfortunately she went out and by the time she came back, all she was hearing was a shrill noise. Rather than disconnect, remove this battery and return to the original battery, she put on the tv and the noise stopped. Case settled as far as she is concerned. By the time I came home in the evening and she told me all, the battery is bloated ti this level( picture attached).
1. Can i still 'manage' use the battery?
2. What is the implication eg fire hazzard, explosion etc?
2. Why fidnt the cc trip off and stop the vharge agter the battery became full, or is it not suppose to do so. It is a 12/24v pwm
4. Would incorporating a fuse after the cc prevent such occurence in the future for even if i am using a bihger battery (100ah for example) and it gets full while i am not home, suvh can still happen.
5. I am saving up for a mppt cc (that fake/original that was a csuse of argument on this loop recently, bluegate or do: will confirm the name)
Thsnks all

Village pipo dinor shook hand for the matter. You are lucky. NiyiOmoIyunade has said it all btw.

Pls encourage madam to ALWAYS inform you of any observation when you are not around. No matter how negligible it may seem, and also in turn ask questions or educate yourself before making adjustments to an Electrical setup.

Some mistakes can cause irreversible damage.

NiyiOmoIyunade:
While this is mostly a DIY and learning forum, I always say the burden to equip oneself with sufficient knowledge to DIY and work safely and with minimal financial losses lies upon each person's shoulder as a standalone individual.

Lithium batteries have a nasty habit of catching fire and burning spectacularly if abused or misused.Typically the fire cannot be put out and needs to exhaust itself after running its full course.

Be careful if DIYing Lithium and more especially be extra careful if you are modifying or repurposing a prepackaged setup to suit your needs (assumed Manufacturer made it safe). Be sure you really know what you are doing and fully understand the capabilities, tolerances and limits of each part of the system you are playing with.

In the last one month, I have heard two cases of spectacular Lithium battery induced house fires which destroyed both the RE investment and significant chunks of the houses themselves.

Like I always caveat when giving free advice be it solicited or not 'Management will not be held responsible o....'

management is out of the building.

generationz:


Ezz not my fault na

Hmmm.. Ok o. My hand dinor de.

tugrow:
Goodmorning, may i know what is really the problem?

I finally got to pick up my item today from his office.

While i still feel the reasons why my item was held up and delayed could have been avoided, I think the apologetic nature the staff and Tugrow himself received me today was impressive.....i asked for a discount, and he graciously knocked off about 8% charges from my fee. Thank you

Pls Tugrow look into avoiding these delays as best as you can and you will go far. Also improve on the communication of your staff to offended clients.

Cheers

Abidec76:
Good morning fellow hustler in the house.

Give away SUNDAY was really superb and shows we truly love each other.


I will like to share a secret with you this morning, I hope it benefit lots of people. I was online yesterday when I saw a post on a lady who died due to the fact that her colleagues and friends called her a fat Woman.... To cut the long story short she went to the hospital for surgery in removing some body fats. Unfortunately she later died after a successful surgery.

Pls there is a NATURAL WAY TO reduce our big STOMACH.
ITS CALLED WATER THERAPY. No need of Exercise or drinking of different TEA � , IT WORKS LIKE MAGIC.

THE PROCEDURE IS THAT DRINK WATER IN THE MORNING STARTING FROM 5AM OR BEFORE BREAKFAST EVERY DAY.
Wait for 3 to 4 hrs before eating anything.
By doing that I can guarantee you 3 days after you start it, your stomach will reduce and you will use the TOILET more often.

Its working for me and my sister and am truly happy. I believe it will work for all.
Imagine you doing that for 3 or 6month you will achieve your desired results.

THANKS AND GOD BLESS.
GOOD MORNING ALL AND DO HAVE A GREAT DAY AHEAD.

Written by ABIDEC76.

What qty pls.... This is d best news i heard today

generationz:
Please I have a few questions too


1. Do you think the zinox pwerbank is really 105000mah . it charges my laptop for 12 hours after a single charge.

2. 105000 mah translates to 105ah right?

3. That means its twices bigger than a 40ah lifepo4 battery, right?

4. Would a 66000mah zinox Powerbank be better than two 20,000 mah rommoss power banks for phones? I've heard rommoss charges phones well about 4times for a 20000 mah power bank.

Do you think the 66000 mah zinox power bank is really up to that or its just for marketing sake?

Compare batteries in watt hours rather than amp/hrs..... The missing voltage is used to mislead people when battery capacity is being adver tized most times

generationz:
Omg

God bless you.

I'm going to assemble this set up soon.

Please do I need any cables to connect the panel to the charge controller?

@bolded ...pls be careful with lithium batteries in particular and electricity in general. Your question shows your are going from exam to classes rather than from classes to exam oh.

ojeysky:
16k do you have direct DC setup or you are doing conversion?

For the ceiling fan? Pls link of store u got it.

To whom it may concern:
I have noticed that not all DC fans come with brushless dc motors. Some simply use a brush dc motor. That is still more energy efficient than an ac motor, but a brushless dc motor is the best energy wise, plus it doesn't generate static noise that can interfere with radio signals. Just so you knw.

generationz:
Please, who has received a good experience from using the lithium power packs?

I would appreciate your inputs.

Thanks.

I didn't enjoy mine....maybe some people did. Good luck

olaolu11:
If a 12 volt battery reads 11.7 volts, what does it mean/imply. Does it mean the battery is no longer good?

Under what conditions was that reading taken? What are you trying to get when you took the reading?

11.7v is just a value within the operating range of a "12v" battery.

mank1234:
2kWhr from an array of 1.5kw is not impressive. You should be doing 3-6kWhr if the system is performing optimally (enough load and battery bank to accept all it can generate)

KWhr explanation: your system works from morning to evening generating power in kw ranging from 0kw to 1.5kw since your panel max at 1.5kw. The sum of all that generation is taken taken to hour term. Example if you have a constant 600w power output for 10min that's equivalent to {600*10/60} ie 100Whr.
So a 2kWhr generation can be said to be 2kW power output for 1hr but in reality the power was lower (less than 1.5kW) spanning a period between 6am and 6pm

Thank you for clarifying this. There is a difference between kw/hr Value and harvested peak power value.

Donald3d:
Kindly make an offer, if its reasonable, you would get it.
If its not good enough, I would politely decline.
Thank you in advance Sir....

we used to have this electric cooker as a kid. it didnt last at all. does anyine have good user experience with this product? @seller..will it go for 10k? pls i dnt knw the current price oh, im just bidding.

drakeskull:
Refund the dude Oga scammer!!! Nothing like rebranding here. To the intending customers out there, tugrow is a scam. Patronize them and watch out for stories.

OMG! IM IN TROUBLE. WHY DIDNT I READ THIS BEFORE PLACING MY ORDER FOR CHRIT SAKE? AND I EVEN REFERED SOMEONE TO HIM WHO HAS ALSO PLACED AN ORDER.

oga please where is my item now he is not picking my call.

see tugrow dont let me have to take leave of duty from work and come to your office oh. it wont be funny i swear! lets respect ourselves oh. send me my item!

Hi house,

Pls those knowledgeable about the internals of an mppt charge controller.....As a rule of thumb, whats the value of the cc input (or output, not so sure) capacitor and its max input voltage? I mean those big black electrolytic caps in them.

generationz:
Please I need advise on how to go about setting up a solar system with panels, inverter, battery and all for not more than 70k

It's just for a laptop and a phone. Thanks.

Please if you know where I can get new or fairly used products to fit my budget it would be of great help.

Off the top of my head.
-3used 100w panels connected in parallel
-a 12v pwm charge controller
-a 200ahr used or new.

Or

--3used 100w panels connected in parallel
- one of them 18650 battery packs made from recycled cells
-laptop adapter and phone charging ports too.

For both options u may need to up your budget a little.

Cheers

harizonal123:
.
Very correct. Energy conservation is a must. I had to change almost all appliances before I could enjoy my single 12v200a & my battery has never read below 50% since then. Have a DC 15"tv of 20w, instead of my 49"tv of 60w, DC standing fan 19w instead of my ceiling fan of 70w. I even have 1w bulbs that I don't use cos it's too deem for my liking. Had to replace them with 3w bulbs. Although I'm currently saving money to get a second battery but with my 15" tv I can now watch TV as long as I want. Solar energy is money I tell you. It has not been an easy journey so far but it's very sweet enjoying noiseless electricity 24hrs

iv always thought about getting a mini dsp projector. some are the form factor and almost same size as a phablet....they charge and run off a regular usb plug. but i dnt have the time nor reources for now for that adventure. that said, this ur dc tv. where did u get it from pls? name too.

Deluxe8000:
unfortunately i don't have the luxury of babysitting battery. i run off- grid system and on-grid system. The on- grid is working perfectly without babysitting. why should i babysit off-grid solar set up?

@bolded...even the grid you see, you will be amazed at the maintenance monitoring that goes into that provision of grid power. Maybe expand your ongrid setup and utillize it for all your needs. Solar may not be for you after all. Honest view from me.

Deluxe8000:
pls if a solar system kills a battery within 3months which is faulty? solar panels OR charge controller.

The design killed it. most likely.

funken:
I cant thank you enough. You just saved me literally thousands of naira on solar items peddled on this thread. Thanks!!

Glad i could help too. Yw