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Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 11:47pm On May 07, 2025

KA24DETT:
Bros, yall are saying the same thing. Your theory is that 0.2c increases longevity which might be true. He is saying 0.5c does not affect longevity but rather calendar ageing will do you in before the battery dies from high charge rate.. He is more geared towards efficiency rather than longevity. Both things can be right.
Its the same with lead acid and tubular battery charging with solar. Not enough sun hours to go through the charging cycle (bulk, absorb and float). Most lead acid batteries die of sulfation.

The funny thing is not once did I say don't charge at 0.5C, and I repeated it several times; yet I get pulled into an argument that it is 0.5C or nothing

It's all good though, I believe healthy arguments should be encouraged for people to learn, though I must say I did not gain anything new from this exchange though.

I lie, at least I now know that spambot is the anti christ that will finish this forum. I hope it does not ban me for the last line though

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 11:31pm On May 07, 2025

ManAdii:
I observed that this Haisic no get 24v batteries

They do, it's 8kw and about 800kish.

It will likely be this 4kw cells in series.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 11:28pm On May 07, 2025

Dam5reey1:
Deriy no dey group, Haisic battery saving life..
Not sure any individual will lay their hands on Deriy at that price anymore.

Anyways, I just recharged the batteries back and it took in 291AH..

Selling it off at 420k, for willing buyer, I have about 20kwh batteries and 2 units of 100AH 12V I can play with. This 3.6kw is unnecessary to keep in Lab.

I am covering the warranty stated on the batteries in any case.

Teardown was aborted due to Build quality. Unless I remove Laser welding cells cannot be revealed fully.

Hmmmm, difficult to tear down, not a plus there.

Were you able to assess if it has a smart BMS?

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 7:36pm On May 07, 2025

KA24DETT:
Bros, no body is saying you are wrong, you might be right but only time will tell.

Its fine. It definitely did not start off about being right or wrong. It's just about providing as much information as possible for people to learn and choose their own path.

You can't have true understanding if you stick with what is said without understanding why it is said. Even if I don't agree with knowledge, I will still post it and acknowledge it, and I believe we all do that in certain ways in our dealings in life. .

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 7:29pm On May 07, 2025

GloryJoyeux:
Hi,

As an academic, I know your type. Because you have interests in a field doesn’t make you a professional, neither does it give you the go ahead to blindly argue for a cause with a seasoned professional. I will never argue a field you are a professional in but I will choose to learn.

My responses here are usually apt and well grounded, everyone can attest to that, and that is because I’m a seasoned professional.

My recent phd internship was with a contractor on electrify america, we installed and commissioned dc fast chargers for vw group and did one in San Francisco. I have also interned at Siemens in Germany. Amongst others.

Now back to this argument.

Here is the big picture!

If you always charge at 0.2C, you waste time that could’ve been used to return energy also calendar aging eats into the battery life before cycles are fully used.

If you charge at 0.5C, you extract maximum value before time-based degradation sets in.

The extra charging time drags out your use of the battery, making it more likely that the battery degrades from age before you finish using its full cycle life. 0.5C gets the job done faster, and within the safe window of calendar aging — making it more efficient in the real world.

Many people believe charging a LiFePO₄ battery at 0.2C is better because it’s “gentler” and might increase lifespan — but when you consider real-world energy use, charging time, and unavoidable calendar aging, this strategy backfires.

In real-world use, 0.2C is a waste of time. There is no practical advantage over 0.5C, only the illusion of one.

I won’t respond to you anymore on if topic.

This response seems to be based more on assumptions than on what was actually said, addressing a point that wasn’t raised—perhaps in an effort to make a larger statement and fulfill a feeling of self.

To clarify for those genuinely interested:

Do I primarily charge my batteries at 0.2C or lower? No.

Have I ever told anyone they should charge at 0.2C or lower? No. I’ve always said: charge at whatever suits your needs. If that happens to be around 0.2C, then you’re in a good position to enjoy longer battery life.

Is it true that charging at 0.2C generally leads to better battery longevity compared to 0.5C? Yes, it is. All available data and discussions I’ve seen here support this principle—slower charge rates tend to preserve a battery’s health over time.

So, while some may prefer to give fixed instructions, others—like myself—aim to share information that helps people understand the topic and learn .This should hopefully arm them with the ability make informed choices.

Best regards.

AI filtered sad

2 Likes 1 Share

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 6:46pm On May 07, 2025*

@twinstaiye @Seun

Please I have been banned by spam bot 6 times while trying to reply to only one poster today? Are some members of this forum more protected than others?? Please help me check all is well, in case I am banned again now

@twinstaiye @Seun

It is a big shame that we are now forced to filter healthy arguments through AI to beat this overtly aggressive spambot. A big shame. Banned 7 times in a day.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 5:41pm On May 07, 2025

GloryJoyeux:
More cycles? Hmm.

6000/365 days is 16 years.

Read up on calendar aging, I don’t even know what you are arguing. You initially said they rate 6000 cycles at 0.3c and below. Unfortunately you seem to not then understand basic chemistry if you are waiting for lfp at 0.2c to give you more.

Hope you know that in the industry batteries are rates on the energy they can deliver in their lifetime. How much energy are you not expecting your cell to deliver at a measly 0.2c in its lifetime before calendar aging?

What exactly is malicious about me not showing you for free how I prompted the AI. Do you know AI prompting/querying is a skill that people pay to develop and learn?

So its the cheap, rejected and 2nd life cells most of us are using in Nigeria that are capable of 6000 cycles shey?

When we purchased the Sako 10kw battery we bought in Dec, the sales rep declared that at N2.1m we were getting cells from the "top 10 lithium battery manufacturers in china" but if we paid N2.6m we'd get cells from "the top 3".... it's obvious like most Nigerians what option we went for.

I'd prepared a proper response to you, but I've been banned 5 times already (due to that reply) so I'll have to wait till tomorrow when I can post images again.

I just hope this discussion has helped people to realise that every advice given here might not be altruistic afterall and you have to be able to read between the lines and decide for yourself.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 4:16pm On May 07, 2025*

I have been banned 4 times on this thread already today, so I am trying to moderate my responses.

Here are some of the studies AI referred to, to come to its conclusion:

https://www.researchgate.net/publication/338255330_Effect_of_charge_rate_on_capacity_degradation_of_LiFePO4_power_battery_at_low_temperature?utm_source=chatgpt.com

https://www.heatedbattery.com/how-can-you-extend-the-lifespan-of-your-lifepo4-battery/?utm_source=chatgpt.com

https://www.sciencedirect.com/science/article/pii/S001346862301513X

https://www.mdpi.com/1996-1073/16/6/2786?utm_source=chatgpt.com

I find the last link really interesting, as it shows that even if you overcharge a lifepo battery at non- optimal temperatures (2 red flags), the battery State of Health of the cells is barely affected at 0.2c compared to the other rates.

Edit: I tried to attach pics of the graphs but not being allowed to[/b]

1 Like 1 Share

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 3:24pm On May 07, 2025

GloryJoyeux:
Hi,

This is data sheet for LF280k v3. Rated 6000 cycles at 0.5C discharge test.

Kindly stop spreading misinformation, if you are not knowledgeable on a particular subject it’s best to learn.

This thing is very simple. Is it scientifically correct, that it will likely do more than 6000 cycles if charged slower at a lower rate with less heat produced?

If not, what science supports the argument that if we have two lifepo batteries that face the same conditions, we will get the same or better life cycles from the one that is charged at a higher C rate of 0.5C?

C'est finis.

2 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 1:48pm On May 07, 2025

fuckboys:
I have a columb meter so no need.

Kindly still help out check this feature. It would help all those still considering who don't have coloumb, plus you would also be able to monitor your individual cells.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 1:25pm On May 07, 2025*

And here is the reverse for the man who accused me of not knowing how to use AI but failed to be transparent.

Edit: Nairaland won't allow me to post anymore pics for now....but I reversed the question, which we all can do ourselves.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 12:45pm On May 07, 2025*

GloryJoyeux:
Hi,

It’s not about prompting AI and blindly listening to what it says. Its obvious from the responses the it is being conservative. Let me show you how to prompt.

If you use AI like you just did in an academic setting, you will fail woefully.

AI sometimes is like a search engine that just surfaces responses from forums and articles, some of which can be very very wrong.

You've not shown anything or proven anything as unfortunately you've fallen into the same trap as the obnoxious guy that started this argument did.

First of all what was the question you actually asked the AI before posting your findings? I made it crystal clear the question I asked the AI.

Secondly, as majorly seen on the forum, what manner of cells is available to majority of Nigerians and what are they purchasing? Answer honestly please.

Thirdly, are you disputing the fact that slow charging (and discharging) produces less heat in every mainstream battery and that can only be a positive when it comes to longevity? Are you saying using a clear example, that if if Dam5reey1 had chosen (dishonestly BTW) to discharge the Haisic battery at a far less rate than he recently did (0.1c) he would have not gotten a higher capacity total and vice versa? Are you disputing that if one is able slow charge and meet all their requirements with inverters that run directly from PV they are being silly by not charging their lifepo battery within 2 hours (or less) and letting it sit pregnant and idly for longer, in want for a better word, a bloated state?

And lastly for now, and most importantly, this was what I initially posted:
So answering your question generally, for best longevity of a lifepo battery 0.2c (or less) is recommended .For a 200amps battery that's 40amps.
Clearly that statement says "your battery will live longer if you charge it slower", is that scientifically TRUE or NOT. And note even if it does 1 or 2 extra cycles, that statement is proven true scientifically. The statement is not proven untrue because you deem those 1 or 2 extra cycles as negligible, that is your opinion (which we are all allowed to have, as I have mine).

My original statement can only fairly be compared to those common sense adverts of staying alive when driving and watching your speed based on the impact of having an accident at different speeds. At 10km an hour you are almost certain to live no matter what the collision. At 180km an hour you are almost certain to do fatal damage at any collison. Did we all now start driving at 10km an hour so we can live forever? Does that however disprove the science of driving slowly?

In short this argument has just been an exercise in doing what Nigerians love to do. Shifting a discussion "blindly" to what you want it to be for aggrandisement and not being able to admit it. Like I've said clearly from the start, the info is there, chose what you want to achieve with your battery and charge appropriately.

https://www.youtube.com/watch?v=Vq6f7BScZ4c?si=6NZ4UyfVLdeYSZPy

4 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 1:36am On May 07, 2025

Dam5reey1:
Issue with AI you are quoting is that they are telling you what information they find online.

I won't be surprised if part of our conversations here was also accessed so it my not be a yard stick for making conclusions.

It's not my yardstick either.

But me and you know as a general rule, every mainstream battery technology we've come across, benefits from being charged (and discharged) slowly rather than in a rush for obvious reasons mostly connected with temperature and heat.

Also manufactures gain when we replace things not when we use an item for 10-20 years. From phones to laptops, they gain when we have to replace the battery, so they'd usually encourage us to charge our items as fast as possible to increase degradation.

Those who can read between the lines would know the best way to balance things out and charge these batteries. Veering a bit, I'll never forget one of my first lessons on here when I learnt a 10hr 200ah LA battery seniors a 20hr 200ah LA battery.

All I can say is I pity anyone who is using a 3rd life Cworthlike LIFEPO battery and charging (and discharging) at maximum C rates thinking it will last for 10 years because "every Lifepo battery can do so".

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 12:07am On May 07, 2025*

KA24DETT:
Is this an ego protection mechanism? Charging at 0.2c does not correlate to longer life expectancy. I told you to post the source of your theory and you reply with S-L-O-W-L-Y. Stop gaslighting.

C- chatgpt

Unfortunately it seems Nairaland will not allow me to post any more pics, but Chatgpt pretty much said the same thing and I encourage you next time to arm your obnoxiousness with AI so you can start all the silly internet arguments you want to with all the ammunition you need.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 12:02am On May 07, 2025

KA24DETT:
Is this an ego protection mechanism? Charging at 0.2c does not correlate to longer life expectancy. I told you to post the source of your theory and you reply with S-L-O-W-L-Y. Stop gaslighting.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 11:56pm On May 06, 2025

KA24DETT:
Is this an ego protection mechanism? Charging at 0.2c does not correlate to longer life expectancy. I told you to post the source of your theory and you reply with S-L-O-W-L-Y. Stop gaslighting.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 11:48pm On May 06, 2025*

KA24DETT:
Is this an ego protection mechanism? Charging at 0.2c does not correlate to longer life expectancy. I told you to post the source of your theory and you reply with S-L-O-W-L-Y. Stop gaslighting.

The only person gaslighting and obviously on an Ego trip is you, as you jumped into a discussion that did not involve you and declared with effontery that I was barely getting 5kw from my PV, when I had clearly posted screenshots of my harvest that makes your claims laughable.

Now I asked you to read S-L-OW-L-Y hoping that you would be able to decipher that I was having a discussion with someone I assumed shares the same maker of inverter that I do and that actually, I actually did not answer his question, as I made him understand that setting up the charging parameters for his battery is a personal thing and largely depends on him and his needs.

My post to him clearly stated that we charge slowly on NEPA on purpose, as I prefer the battery charging through PV as the yield I get on PV is more than enough to meet our daily needs usually.

If you had actually read it, you'd understand that our average charging rate is 0.3 - 0.4C daily, which already marks 60%-80 of the PV array.

Also if you had any understanding of the inverter we are discussing about, if by chance my battery was empty and charging at max 80amps, if my load draw is 1kwh (which it is usually less than) and my yield at that time is 5kwh (maxing the array and this is just an example) then the Inverter would still produce 100amps with 80amps going to my battery and 20 amps powering the load in the house.

So having quality hybrid inverters is not just about charging your battery, as daily the inverter tries to balance things and suite my lifestyle, and I ask it to prioritise using the battery as little as possible, run load directly from the pv, which it does, till the night ....and this now conveniently leads to the battle you and only YOU wants to fight by insisting that 0.5c is the best rate to charge a battery and that there is no advantage or extension of life gained by going lower and charging slower.

For those who can read and comprehend, they will notice it was not my opinion I offered when I said "generally 0.2c" and then making it clear in the very next line that is not the parameter I stick to.

But since you are commanding me and clearly not asking me, I cannot offer my own opinion on it to you.

However, I think their is a solution to this impasse, conveniently designed for obnoxiously rude people, so I will post it and you can go and fight them.

2 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 5:18pm On May 06, 2025

KA24DETT:
0.2c where did you get this value for Lifepo4?. That charge rate is too low and not taking advantage of the battery chemistry.. 0.5c is advisable ( 50 percent of battery capacity). I doubt most people here with home solar can get consistent 50 percent of battery capacity from their solar array at any one time. For your 5kw solar set up with 10kw battery, I doubt you will ever see 5kw generation from your array.

Read what I wrote S-L-O-W-L-Y....and as for what I am getting from the array, you can check for yourself with the screenshots I posted prior to today.

2 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 4:14pm On May 06, 2025

BiigTee:
27th of last month.. Since then na just one headache or another

I see other gurus are already helping you out. I've got faith in Growatt inverters and believe you probably just need someone experienced to come and double check what your installer did.

I also believe if you've got freetime and can spare a weekend to study the manual, you'll probably be able to set it up to your preference and understand if there is an actual problem or not.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 4:08pm On May 06, 2025

Ahyjo:
what values would you advice please? For both grid and pv.

It depends on you and your needs.

The setup referred to consists of a 10kw battery with 5kw pv support. Most of the time this is adequate for the power needs of the family 24/7, so really should be entirely off grid. However, sometimes (depending on who comes around for visits, we're always transiting) 2 inverter ACs are run from 7pm to 8am and this takes it toll especially on days where we'd also run the ACs all day and their was poor pv output.

So to avoid the batteries being regularly charged by NEPA, that usually comes at night, rather than solar, the amps for NEPA were severely limited to half what we set as maximum for PV.

So answering your question generally, for best longevity of a lifepo battery 0.2c (or less) is recommended. For a 200amps battery that's 40amps.

So for our setup (I'm currently not around) solar was set to something like 60-80 amps while NEPA was set to 20-40 amps.

Hope this helps.

2 Likes

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 5:36pm On May 05, 2025

AndroBlaze:
When was this setup?? I just looked again, you've generated more today than you've generated this whole month...their is something clearly wrong with the configuration.

Just checked and refreshed the app after dropping my previous post, it had not updated the monthly figures either.

Anyway, another thing to consider, did you set maximum charging amps on the inverter- IIRC you can actually set maximum charging amps for pv and grid (I remember limiting the amps for grid).

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 5:11pm On May 05, 2025

BiigTee:
Who can please tell me why the ppv generated and the charging power are yards apart on this growatt inverter?

When was this setup?? I just looked again, you've generated more today than you've generated this whole month...their is something clearly wrong with the configuration.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 4:57pm On May 05, 2025

BiigTee:
Who can please tell me why the ppv generated and the charging power are yards apart on this growatt inverter?

It must be a time lag, use this same app and find its pretty accurate and don't get these kind of unexplainable results.

Refresh the app and confirm that connection to the router is working fine.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 7:55pm On May 04, 2025

yoniehuin:
they havent install it but i am waiting for the solar panel. they do not have it yet.

quick question

can a 6kwh inverter work with a 5kwh battery?

I see someone has already answered the question, but any size of battery can work with any inverter as long as the voltage is the same.

You might also want to consider getting your panels from someone else, as Fouani might be dealing with low stock for a while.

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 8:06am On May 03, 2025

numericalguy:
I was asking for clarification so that I would not buy a wrong item. Money is not easy these days and I cannot afford to make a mistake. Also, I didn't assume no BMS, what I said is that type A battery didn't have an obvious BMS

It's fine, but its extremely unusual to find any commercially available lithium battery that doesn't have a BMS. The issue is usually whether the BMS is communicable with or not (Smart) but this was discernable on the image.

It's always good to ask sha, and as you said and I fully agree with, money should not be wasted in the country we find ourselves in currently.

1 Like

Satellite TV Technology › Re: Solar Energy, A Complement To FTA by AndroBlaze: 1:55am On May 03, 2025

Ahyjo:
I no too get load like that but e dey hard to see grid in 40 - 43 degrees weather. I know I’ll not discharge it much and I’m starting with a 5kw array for now and we have on average 7hrs blazing sunlight. I live in one of the driest and hottest parts of this country (sokoto).

Well with the way Nigeria is going it makes sense to go future proof sha. The bigger the inverter though, the more likely the idle and low draw is higher, so if one really wants to maximise their battery it makes sense to go for smaller inverters (3.5kw if no AC).

But big inverters do prove to be more power efficient carrying bigger loads and usually can charge the batteries faster and take more panels......so it's all good.

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