dacool1:



I might be wrong, but I don't think anything is wrong with your batteries.

Most of these battery packs are over rated capacity wise. Also, your batteries won't discharge 100%, cable loses etc.

Plus your inverter is a large one, its self consumption will be great especially if it's transformer based. Get a meter to measure the total amps drawn from the battery banks to be sure.

isangjohnson:
I thought it was just 9.6kwh but when I realized it was 40kwh, I was surprised.
Over 7m for battery bought this year and not enjoying the ROI is very painful.
I pray nothing happens to them now. It's too early.
Please, let us know your pv type and if possible check the harvest from your inverter and the position of the pv.
I'll advise you shut down the entire loads in the house, charge the battery to full and allow it to power the same 2000w or 3000w loads while you monitor the duration.
Make sure you check the battery settings again before you start the process.
If bluethooth bms is attached, monitor the individual cells in the process of charging and discharging.
Fake capacities everywhere. God will see us through.
All the best.

bassdow:

Does the battery ever get 100% charged ?
Could you by 4pm today, confirm if battery is 100% charged ? if NOT 100% charged, maybe because it's in use, then tomorroow, disconnect all load, and charge and take note of it's capacity by latest 4pm.

We need know firstly, if those batteries ever gets charged completely daily.

When things happens this way, it could be the charging system, or the batteries but unless you carefully investidgate, you can't tell for sure.

Who installed the setUp ? What has the person got to say ?

bassdow:

Once had an instance where a solar panel's cable (that black cable that comes directly from the panel's board) got weak and very brittle due to weather activities, but you would never know because it was the wiire inside that became brittle, not the external covering.

Charge controller go talk say all is alright and you would be wasting time on other things when actual fault was from one of the solar panels.

oloet:


No expose this small secret we put for your hand now😂 ..... I just want you to tell him how those clients with under 80ah lithium has been surviving and the duration it has been installed

isangjohnson:


2. You may not have any issue with your batteries. I guess 9.6kwh is about 195Ah 48v.
If I'm right, then the 2000w loads on the battery can only sustain you for about 5 hours when the battery is fully charged to 55.2v (3.45v each cell).
If the idle power consumption of the 18kw inverter wasn't factored into the 2000w, then expect about 4 hours run time from the fully charged battery.
I MAY BE WRONG.

Valto:
so a supposedly 4pcs 10kwh (40kwh) battery, that can't carry 2000w load for 10 hrs. . something is wrong somewhere. a 13.2kw PV might not be optimal but, should manage to charge them full in a day, assuming there is no serious daytime loads
As for that brand and the felly guys, the stated capacity is always fake , but atleast u should get close to 7.5kwh, which means a 30kwh bank..

Braaad:
The batteries are obviously overrated. The actual capacity is less that stated. And the batteries are connected in 15s not 16s.

The inverter is a hybrid and the self consumption will not be more than 300w.

isangjohnson:
I thought it was just 9.6kwh but when I realized it was 40kwh, I was surprised.
Over 7m for battery bought this year and not enjoying the ROI is very painful.
I pray nothing happens to them now. It's too early.
Please, let us know your pv type and if possible check the harvest from your inverter and the position of the pv.
I'll advise you shut down the entire loads in the house, charge the battery to full and allow it to power the same 2000w or 3000w loads while you monitor the duration.
Make sure you check the battery settings again before you start the process.
If bluethooth bms is attached, monitor the individual cells in the process of charging and discharging.
Fake capacities everywhere. God will see us through.
All the best.

Braaad:
Thanks for your response sir,

The 5units are lithium. They were to go into the same system but one of it had a defect, the cells inside shifted on their mounting and was shorted to the casing of the batteries.(the dealer acknowledged it was a manufacturing defect for this type of their batteries)
The batteries are rated 9.6kwh on the nameplate -the dealer says it is 10kwh- it is mated to a 18kw inverter and 13.2kw of solar with remote monitoring.

The batteries were bought February this year. And we're integrated in installation by July this year.


All other aspects of the system are working pretty good, just the battery.

Braaad:
The batteries gets fully charged to 100%

I installed the setup and I "think" the batteries are overrated and the dealers are not honest about it. I also think this particular batch of batteries may have a manufacturing /assembling defect.

where's Warantee & Guarantee when you need one ?

isangjohnson:
I thought it was just 9.6kwh but when I realized it was 40kwh, I was surprised.
Over 7m for battery bought this year and not enjoying the ROI is very painful.
I pray nothing happens to them now. It's too early.
Please, let us know your pv type and if possible check the harvest from your inverter and the position of the pv.
I'll advise you shut down the entire loads in the house, charge the battery to full and allow it to power the same 2000w or 3000w loads while you monitor the duration.
Make sure you check the battery settings again before you start the process.
If bluethooth bms is attached, monitor the individual cells in the process of charging and discharging.
Fake capacities everywhere. God will see us through.
All the best.

Braaad:
The batteries gets fully charged to 100%

I installed the setup and I "think" the batteries are overrated and the dealers are not honest about it. I also think this particular batch of batteries may have a manufacturing /assembling defect.

futurenix:

If you are running the 2000W load during the day then your batteries are not charging to float.

Lithium batteries can be funny. They can indicate 100% full but have not reached the required voltage. Push more charge into it and they will gulp it continuously for more than 3 hours.
If they don't float, the voltage will be dropping faster.

Try charging using utility or generator simultaneously with your PV until the charging current reduces to like 2A while the voltage is 55.2V steady. Try the load again after this and see how long it last.

Braaad:
Thanks for your response sir.

I appreciate.

I currently have very serious issues with the batteries I bought from YOHAKO and I want to be sure the issues are not peculiar to me as the dealer wants to make it seem. I bought 5units of those batteries. I used 4units for a setup, and they cannot support 2000w of load for 10hrs.

Once the sun goes down by about 5pm, the battery drops immediately.

I want to have more feedback so I will be sure this is not peculiar to my case only.

bassdow:


I still believe this is the best approach. because who knows, dayTime load fit dey prevent the batteries from fully charging, but him talk say him don chheck those ones.

Also, that brand no be original Ooo. I never use anything from them, but I know say no be original brand.

na things such as this, dey dicourage people. I recall sharing an instance hhere where I met a man who wasn't interested in spending a dime again to revive his solar setup. The man pocket deep wella yet was reluctant. Na things such as this.

Hopefully it's sorted out. reason why I no dey suggest lithium batteries to people, no be say I no like Lithium technology, but you need really rely on whatever the dealer (since you rarely can get in touch with manufacturer) tells or gives you.

I prefer to buy maximum of 4-cells a time annd use for ttesting. that way, if e disappoint me, I go know to avoid you, except you confess to me say that batch really bad and you don get aother better batch and you're willing to give me good discount. But to count money, go buy box or bunch of cells, I jump and pass

isangjohnson:

This very issue is not peculiar to lithium battery alone.
Just as I stated above, I assembled 160ah 48v battery bank for a friend and I carried out the capacity test yesterday using Victron Smart BMV and the bms. I discharged from the fully charged 160ah (55.2v) down to 11.06ah (50.6v) and 148.9ah was recorded as consumed Ah. I didn't want to discharge further because I was already certain that the stated capacity was completed.
This is what many people fail to do before selling their coupled products and they know for sure that those that are buying their products are not interested in confirming the battery capacity pasted. They're only interested in packaging and the beauty of the box.
Just as I said, most lead acid batteries in Nigerian markets stated either 200ah or 220ah are either 170ah or 190ah.
It's a recycle business. We know them....

mctfopt:


Yohako is a cheap, low quality Chinese make.

Braaad:
The batteries gets fully charged to 100%

I installed the setup and I "think" the batteries are overrated and the dealers are not honest about it. I also think this particular batch of batteries may have a manufacturing /assembling defect.

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bassdow:

Most times, issues such as this, don't get in here, except an end user brings such. na why dem dey vex when called out. dem go talk say e dey write long epistle.

When e happen like this, fiirst they try doing is change the narative. if no be say overwhelming evidence dey, shebi NAF don come out give pressRelease say no airStrike has happened for thhe past 1 or 2 month, but as evidence come dey overwhelming, same nuisance come out talk otherwise.

Some go just dey find way to make it about the end user, and if they succeed, then no issue BUT if not, dem go tag as the batch get issue or dem go on the lowKey, reducue how they advertise such products here.

For nairaland eh, products dey cost pass for JiJi & physical market.

I understand both cheap annd expensive productt na market, but e get amount wey person go dey ready to spend, you advice am otherwise.

It's obvious the inferior product pays the dealers much moore than the quality ones.

GuestJoe:


Can I have a chat with you sir. I would love to know some secrets that you know. Thank you

toyeoye:


E get one youth wey him name end with IE. He dey always form queen's English ontop call
This guy almost chew me raw 100%.

toyeoye:


E get one youth wey him name end with IE. He dey always form queen's English ontop call
This guy almost chew me raw 100%.

mank1234:


No need to panic.

What is the battery voltage at this 100%? This will tell if the battery is really 100%

At what battery percentage does it shutdown? This will tell if capacity is used up.

Can we see the daily summary of your solar assistant page? This will tell what entered the battery and what came out.

Edit: send PM I'll send you my email address so you can give me the link to your solar assistant instance and add me as a viewer of your solar assistant. Viewer access prevents accidental modification of your instance.

Braaad:
Thanks for your response sir.

I appreciate.

I currently have very serious issues with the batteries I bought from YOHAKO and I want to be sure the issues are not peculiar to me as the dealer wants to make it seem. I bought 5units of those batteries. I used 4units for a setup, and they cannot support 2000w of load for 10hrs.



Once the sun goes down by about 5pm, the battery drops immediately.

I want to have more feedback so I will be sure this is not peculiar to my case only.