₦airaland Forum

I had sent the pack back to him 3 times before. Within a week of getting it. It did the same thing, I sent it back. A few weeks later, same issue. In one occasion, I even sent it back from the motor park because the BMS will not come on!!! From the motor park o!!

Later the guy started giving me attitude and made up my mind not to contact him again.

I have since moved on and getting packs I need from other people.

Recently got 3 packs from Valto, no issues. I have gotten 5 from him without issues

BigDickProblems:
Your best bet will be to contact the guy who built it. He will appreciate it too.

Some cells were reading 0v, some read less than 1v and most between 1-1.5 and one read about 2v. I had only a 12v 6amp charger available. The charger had repair mode for lead acid batteries and was forced to use it. I broke the pack down to 12vs and connected the pack to the charger without BMS just to see if there is any hope for the cells. The charger will not initially charge but the repair mode woke them up and I have the four packs at about 12.3vs over the next 6 hours.
I have since disconnected the charger and will see this weekend if there how much of charge they are able to hold

More pictures .
The BMS was burnt and had refused to connect earlier by Bluetooth BUT the balancer connected!!!
Also 14 cells has absolutely no means of identification while two with identification seemed to have been patched on to the pack

Good day house. I got this locally assembled pack ,designated as 48v 6kwh, about 3 years ago connect to a 2.5kva Felicity inverter and a 60amp CC. It was a standalone off grid system connected to 1800w panels.
I was called that the system just shut down about a month ago. It will not take a charge but still kept the CC on. The display on the battery indicated 38v and the CC automatically reverted to 24v and was displaying OVER VOLTAGE disconnect. I was not able to get to the location until two weeks later. By that time the battery displayed 17v! Unfortunately, I had lost some pictures taken before opening the box but kindly see some pictures.

Tdoctor:
Please, do you have details on how he achieved this and what voltage settings he is using?

Likely 48v. I have connected such in the past BUT if you really parallel them, then you must understand that you have to sacrifice one set up for the other. That means that your charging profile should have to favour one battery type as you cannot do both.

The other way is TWO Independent battery bank with a changeover switch to select which bank to use with your inverter. Each battery will now have a CC with the appropriate charging profile.

FEGEITOK:
Valid point, my neighbor has never recharged the meter since I came unless she is using the wireless module to recharge.


When I saw a house metered the other day, the official asked the houseowner for N20,000.00 to make the meter read slowly.

I am now more emboldened to tear apart those boards and really check what is going on behind them

Just dont by mistake bypass Nepa meters o! that na crime,

If I understand you present predicament well , I think what you should do is trace what is going on rather than meddle close to the meter. I suspect the cause of your challenge is the automatic neutral wire selection by your inverter. I am presently having the same challenge in my house with ONE inverter out of the TWO connected. I have been using both for long and did not change any connection, but suddenly one of the inverters started backfeeding to the grid with very high consumption WHEN NEPA IS OFF AND I SWITCH THE INVERTER ON. The only way to STOP this excessive discharge is to disconnect from the grid by putting my changover to neutral OR use it in BYPASS mode with the ON switch off.

If you have one, try and put an automatic change switch before the AC input to your inverter and see. AC supply to your inverter will only now occur if there is GRID and prevents a backflow

Hope the transformer was not changed or a resistor added?

KudozInteriors:
Good morning bosses
So much learning in this space. Thank you all so much.
It’s been a while. I went to supervise a construction work and network was really terrible there. We’ll, I’m a certified civil/structural engineer o in case someone here has work for me🙏🏼😃

I’ve been having an issue with my inverter since I came back. I took one of my studio monitors (speakers) to an electrician to fix the switch as it was problematic. After that, I noticed that each time I switch on the speakers, my inverter fan increases in speed like the sound of an ox fan and once I put off the speakers, the fan relaxes after a few minutes.

Please who has experienced a thing like this before?
What could be the cause of this?

Thank you sooo much🙏🏼🙏🏼🙏🏼

Good observation. Corrected. Mind thought, hand typed something else!

HeavenlyBang:
Current draw. Not power draw.

Yohako 24v 5kw do not cap. Carried 1.5 hp water pump, 1.8kw water heater and other house hold appliances. We were having a house party and guests were loading the system as they wish until smoke was noticed from the power room and battery cable was noticed to be melting. I had since doubled the cables and the inverter still in business.
I had expected the breaker to cut power too

abuzz33:
Except that most 5kw 24v inverters cap maximum output at 3000w or 125A.

Yes( from personal experience). The current draw in a 24v(amps used at a given voltage ) will be double of what a 48v system will use for any given load.
Implications: at the peak end of load, the 24v 5kw system will be drawing about 200amps, putting your cables under serious strain, getting hot and catching fire.
Trust me , I have both systems

eghos12:
Quick question 24v 5kw and 48v 5kw is there any difference when in use?

It is likely back feeding to the grid. Try and switch off ALL your connection to NEPA while the inverter is on, and you should notice a drop immediately if what I am suspecting is the problem. Note : disconnect your house from Nepa and see

Ofejiro20:
Good evening Hux...

I've a 5kva Syndian Inverter with 8 luminous tubular batteries which powers all my appliances like 1.5hp Lg inverter, 65 inch Lg TV, Blender, Thermocool Hiscene Table Refrigerator, 4 fans and lightning points. I bought my inverter under good working condition but as fairly used, and it has served me for 3 years now.



This is the 3rd time I've repaired my inverter and just one week of using it after it was repaired, I noticed the fault as started again. The inverter will be making a humming sound inside it and the load rating on the inverter will be like 13% to 14% when my appliance is switched on and even when I switched off all the loads.




Why is my inverter making humming sound and why is the load rating 13% or 14% even when there is no load on the inverter? Is it normal?

Royle2014:
This is it

EXCELLENT! Press and hold down the enter button for about 3 or more seconds. It should enter the setting mode. Once it does , kindly let us know your findings

Can you send the picture? I have a 5KVA Yohako inverter (Non Hybrid) but the settings are editable. I suspect yours is the same type.
Does it have a screen and four buttons?
Don't sell off before you confirm this o!

Royle2014:
So guys. I've had a 5kva Yohako non hybrid inverter i bought back then for an installation but i never used. Now i have a 10kwh lithium battery and i want to install it. However, an engineer told me that i need to get a smart hybrid inverter because installing my non hybrid yohako inverter would ruin my lithium battery because it's not smart and wont be able to set cut off voltage etc... He's suggesting that he can help me sell off my 5kva 48v Yohako, I'll add like 100k (amount to buy a stand alone charge controller) and he'll get me a smart inverter of 3.5kva or 4.3kva for 350k....so he plans on selling a 5kva brand new Yohako for 250k. The whole thing sounds fishy to me....is he telling the truth or can i go ahead and use the Yohako 5kva with the 10kwh lithium i have?. I already have 4 590watts panels, all i need to do is to order a charge controller and do the install. I dont plan to charge with grid fyi.... Strictly solar charging

fuckboys:
I don't know about external charge controller but most hybrid inverters would wake a sleeping BMS

My Bread inverter did when I first drained battery to zero to activate the BMS.

Everything went off, both battery and inveter, the first sunlight the next morning immediately turned on the inverter which then waked the BMS.

Ah! Good to know about Bread inverters.

favouredbymercy:
Boss. Please I need your help ooooo. I need una help o. I hit low voltage cut off for the Haisic 25.6v 8kwh battery and now my battery just shut and wont start. Does not come on. Power from grid wont charge it. Please how do I wake it up 'MANUALLY' like you said. Please Bro. I nor knw say this thing once e reach lvd go shut down totally 🥺

I know you have sorted this out now but just putting this information out here.
Not ALL inverters are smart and able to automatically wake a sleeping BMS. And nothing is wrong with the BMS of your battery by the way.
Settings on your inverter should be changed to make the LVD ( low voltage disconnect) to be about 1.5 to 3v higher than the Low voltage shutdown (LVS) of your battery. So for a 24v system if battery LVS is 20v, set inverter LVD to 22v. Mine is even set at 23.5v!
Other options:
1)Better to buy batteries with smart (Bluetooth)
enabled) BMS. You should still be able to communicate with it despite a output shutdown and wake it from the app on your phone
2) Get a AC Lithium external battery charger for such occasions. Need not to be expensive or of high ampere. Just enough to wake it
3) Get a external CC that is solar powered ( some newer Felicity cc do that for example) and once the Sun is out , wakes the battery. Most CCs are battery powered and will not work. So you have to look for CCs with that capability.
4) You may need to wake the Battery by connecting a similar voltage battery in PARALLEL to your battery.
5) Worst case scenario: On one of my setups where I could not alter the LVD of my inverter. I quietly connected some old Lead acid batteries in parallel to the Lithium battery pack. This ensures
that the Cc will be on even if the Lithium battery BMS sleeps and once sun comes out charge from the CC will wake the battery. Two years running and no issues

I tried purchasing something from Fouani yesterday and noticed that my previous login details do not work again. Is that normal? I wish to buy things but worried I might be on a cloned site!
https://fouanistore.com/ was where I visited. Made an order but no confirming email, nothing!
Am I just paranoid?

iraybuju:
Please does anyone know about this controller. I want to change the battery setting parameters but it has a password. I already asked the person who sold it he has no ideal about the password. It will work very well with acid batteries but now I have lithium. Your input is appreciated.

The Yohako inverter I have uses 12345. My experience is that quite a number of Chinese electronics use easy to remember default passwords. Try 0000 or 1111 erc

I think Seun has relaxed the 40 character minimum post for this forum at least, I have tested the limit twice and my post have been visible.
However, it seem people have been having challenges posting on Nairaland and many people are just pissed of!

Barezzi:
There are so many hidden posts. What's going on?

Barezzi:
There are so many hidden posts. What's going on?

Bot attack!

dollarnaira:
Best way to kill this thread by 40 40.

Just testing Seun!

I totally and wholeheartedly agree with your landlord. No matter the assurances, NOBODY can be fully sure of the outcome of roof installation. There are too many tales of woe!

Iinnov8:
Yes o...real matters. My landlord had me write a strongly worded undertaking that I will be responsible for any damage to his roof that results from the installation. Some landlords outrightly refuse

Running on solar? Likely the inverter was trying to charge from the low grid voltage. I have mentioned this possibility before.

https://www.nairaland.com/390522/solar-energy-complement-fta/1935#134429699

isangjohnson:
Please, does anyone have any experience with inverter being exploded?

A customer called and told me yesterday that his 5kva 48v Felicity hybrid inverter exploded at about 8pm and smokes were every where.

Though I'm sending someone to his house today to check what actually happened but I tried asking him certain questions to know what actually happened. He told me there was nepa light (low current) but the house was running by the solar. The weather was normal and lightning/thunder at all.

The installation was perfectly done.

HeavenlyBang:
That wouldn't limit his output to 500w, though. Don't think I've seen an MPPT that requires higher than 120v startup, which his panels supply.

Mrreed is actually right. The 120-120v range is for the CC to wake up and not necessarily function best. The best MPPT range should be in the manual. Rule of thumb is starting from X2 of the minimum input voltage. Anything from about 240 to 300v

Penuelseun:
I believe that the techfine has no editable low voltage setting, you have the option of buying a low voltage disconnect relay from AliExpress or getting another inverter that supports it.

Many thanks. the issue seems to be OVER VOLTAGE DISCONNECT from the BMS . During the night with minimal usage, the inverter continues to charge.

Good afternoon house, i need advice on an issue at my place of work in the server room. A felicity CC + Techfine transformer based 5KVA inverter + YOHAKO 24v 5KVW LifePo4 battery system has been giving problem. The system will just trip off arbitrarily, usually at night. I suspect its due to battery OVD from the battery BMS. What are the options available apart from replacing the setup.?
NB: There is backup power from Gen or Grid most times. Main use is to keep server online pending either of the backup coming back

Be informed. Read the NYSC Act. Ignorance of the law is not an excuse. Online supporters, no matter how many or how vocal , do not protect from the consequence of ignorance. My opinion do not matter. Who the Preside t is do not matter. Her state of origin or service do not matter.
There are many people here espousing their personal opinions and beliefs. That is just noise. That too do not matter.
Change the law, then you can change the consequences.
As of today, her NYSC year is in jeopardy and minimum of extension. If she persists in this path, then........next year is another year!

Likely to be low voltage more than any other things like high voltage or surge. With low grid voltage, more amperes will be drawn to be able to charge your battery. This will generate very high temperature , wires will melt and shorting becomes inevitable. I once had had an inverter literally catch fire from that.

burnerr:
Wahala, I never even use this thing up to 2 weeks. Any idea what might have caused it?

maklelemakukula:
Why tf are the DIY boxes for Lifepo4 batteries so expensive. Any alternatives available locally ?

What price was given for the imported boxes?

Likely the inverter is hybrid with inbuilt Cc to accommodate the other panels

ask4bk:
35 pieces of 555w panels? 😱😱😱😱😱

Choi.

Why you using it on only 1 cc of 120a?
120a means the highest it'll use to charge the two batteries is about 6.5kwh.
With 35 of those panels, at peak you could produce 19kwh. What happens to the rest not used?
You should've got 2 mppts and you will have enough juice to pump into both batteries.

He is likely in this forum!

HeavenlyBang:

https://www.youtube.com/watch?v=jIiRooFN15o?si=kM-_JaX_xLu4ICR4

I've not seen someone who puts out as much bad information as this guy.

skywalker95:
Hello house. I think I made a mistake by buying 4mm DC cables. I intend using two Jinko 615w panels. Please, is there any risk of fire hazard with this wire or will I only lose efficiency from my panels?

Get your answer yourself at this site: https://www.solar-wind.co.uk/info/dc-cable-wire-sizing-tool-low-voltage-drop-calculator

You can play around with the variables and check what suits you best, costwise and performance wise

Is is locally available or online? Price?

Modified
What is the price of the extra one you want to dispose?

Dam5reey1:
This device is a one way direction counter.


I would recommend you get a Bi direction Coulumb Counter BT version, especially to monitor battery usage. though they are not cheap.

I am testing the WiFi version with Screen.