NewStats: 3,263,753 , 8,181,274 topics. Date: Saturday, 07 June 2025 at 05:55 PM 51o5v

twosquare:








Of course, they don't know what they are saying. Listen to the advice of people on this thread. One thing about Nairaland ehn, you will get first-hand experience of real-life scenarios with no sugarcoating.

Please, do your homework. Do you know the watt ratings of those gadgets?

Even I, mentally, calculated about 1,600 watts for you for a start. You will still buy solar s o...and you must over for it, because of extremely cloudy days...your inverter must be top-notch....then, during the night season, battery is crucial. Start counting from 5:30 pm to 10....you need nothing less than a 5/7 kWh of lithium battery that will carry you enjoyably. Then your inverter should match your s. That's it.

From the suggestions have seen so far,I can see using tubular battery is a bad idea.i would consider making the required adjustments.Thanks for the advice.

Hello house, I want to get a setup was thinking of a 5kw growatt inverter. I know lithium is good, but the cost is
Would 4 12v 200A gel batteries be a good alternative or not?
Thanks in advance.

burnerr:
Hello house, I want to get a setup was thinking of a 5kw growatt inverter. I know lithium is good, but the cost is
Would 4 12v 200A gel batteries be a good alternative or not?
Thanks in advance.

Lithium is same price as tubular, what's the issue?

I will like to know from experienced people here just for learning purposes: what determines the LVD on Lithium batteries itself. Is it set by manufacturers or is dependent on the type of BMS used.I was just wandering why some LFP will cut off at 9.8v,some at 10v and some at 11v.

HeavenlyBang:


Lithium is same price as tubular, what's the issue?

From what I've seen it's more expensive.

People by the bms discharge port on Ebike battery builds all the time.
So why not on Home setups with the Inverter already having LV protection? In fact, most people won't need more than 100a Bms - charge only- (If you by the bms discharge port and connect Inverter leads directly to Battery terminals)

JJacko:
People by the bms discharge port on Ebike battery builds all the time.
So why not on Home setups with the Inverter already having LV protection? In fact, most people won't need more than 100a Bms - charge only- (If you by the bms discharge port and connect Inverter leads directly to Battery terminals)

Dont play with Lithium batteries abeg.

BMS is for protection and its cheap.

omotoda:
I will like to know from experienced people here just for learning purposes: what determines the LVD on Lithium batteries itself. Is it set by manufacturers or is dependent on the type of BMS used.I was just wandering why some LFP will cut off at 9.8v,some at 10v and some at 11v.

Depends on BMS in use. Some BMS allows you decide the cut off voltage (eg JK, JBD, Seplos etc) some come preset.

Attached is my JK BMS power off voltage but it'll enter cell under voltage protect at 2.6v, you can decide to change this value. Any time any of the cells reaches this voltage, it's power off from the BMS and I'm yet to even remotely reach here since using the battery

JJacko:
People by the bms discharge port on Ebike battery builds all the time.
So why not on Home setups with the Inverter already having LV protection? In fact, most people won't need more than 100a Bms - charge only- (If you by the bms discharge port and connect Inverter leads directly to Battery terminals)

This is how my neighbour lost 3 of his 280ah cells three years ago. He bought Daly BMS (300A) and was too lazy to connect it. Ended up overcharging his batteries with 3 cells swollen so bad he was afraid to use it. The charger he was using was a 48v 3000w Huawei rectifier. It was a tough lesson well learned

Always use a BMS. Or get ready to either rebuild a house or buy new cells or both. The choice is yours.

mctfopt:


This is how my neighbour lost 3 of his 280ah cells three years ago. He bought Daly BMS (300A) and was too lazy to connect it. Ended up overcharging his batteries with 3 cells swollen so bad he was afraid to use it. The charger he was using was a 48v 3000w Huawei rectifier. It was a tough lesson well learned

Always use a BMS. Or get ready to either rebuild a house or buy new cells or both. The choice is yours.

Sorry o but how on earth will one overcharge a battery with a right charger bms or no bms?

Cc cannot overcharge your battery with right setting.

For cells to go swollen due to overcharge must be an extreme negligence. Few minutes of overcharge does not translate to instant swollen/damage. Your friend must have been charging at higher amp and voltage over a long period of time.

Note too than bms can fail too. So while charging at the right voltage, a bms is now another form of protection along with it.

Haba e never reach "rebuild house stuff". For LifePO4 to result into fire bro, YOU MUST HAVE ABUSED ABUSED ABUSED. If you talk of lithium ion now enhen body go shake. Don't let internet YouTube guys add fear to your spin.

Fake lithium ion can easily burn but u see those original branded ones, they are built not to catch fire unless u abuse dem extremely. I have deliberately charge a Samsung 26J lithium ion cell to 5v according to the data sheet. It gets hots but no fire bc it was just close to an hour. Since more fake are in the market, you hear of more fire fire fire over the internet.

We all drive in vehicles that store petrol but still comfortable with them despite the dangers.

dollarnaira:


Sorry o but how on earth will one overcharge a battery with a right charger bms or no bms?

Cc cannot overcharge your battery with right setting.

For cells to go swollen due to overcharge must be an extreme negligence. Few minutes of overcharge does not translate to instant swollen/damage. Your friend must have been charging at higher amp and voltage over a long period of time.

Note too than bms can fail too. So while charging at the right voltage, a bms is now another form of protection along with it.

Haba e never reach "rebuild house stuff". For LifePO4 to result into fire bro, YOU MUST HAVE ABUSED ABUSED ABUSED. If you talk of lithium ion now enhen body go shake. Don't let internet YouTube guys add fear to your spin.

Fake lithium ion can easily burn but u see those original branded ones, they are built not to catch fire unless u abuse dem extremely. I have deliberately charge a Samsung 26J lithium ion cell to 5v according to the data sheet. It gets hots but no fire bc it was just close to an hour. Since more fake are in the market, you hear of more fire fire fire over the internet.

We all drive in vehicles that store petrol but still comfortable with them despite the dangers.

Exactly why BMS is there, we cannot guarantee everyone handling LFP know the do's and don't so BMS just come as save the day, when they complain we see exactly what is wrong and fix it.

If not for BMS do you know how many Lithium batteries being installed without using correct profile, so use AGM, some use Flooded and leave equalization voltage on.

Dam5reey1:


Exactly why BMS is there, we cannot guarantee everyone handling LFP know the do's and don't so BMS just come as save the day, when they complain we see exactly what is wrong and fix it.

If not for BMS do you know how many Lithium batteries being installed without using correct profile, so use AGM, some use Flooded and leave equalization voltage on.

It is bc some humans are so dump that they will use anything called charger to charge any battery regardless of the profile. These are the ones that made lithium appear as if dey are too dangerous to touch.. QED

It is like the old saying: "Change your car engine oil monthly" --- scam

Dam5reey:


Alpha is expensive small.

Sorry sir! Alpha isn’t expensive when you review the battery model of Growatt Future Series! Growatt is 5kwh while Alpha is 10kwh!

Sakopower:
Sorry sir! Alpha isn’t expensive when you review the battery model of Growatt Future Series! Growatt is 5kwh while Alpha is 10kwh!

Why do you keep using the exclamation mark (!) in your posts? It means you are yelling at the person you are responding to. You are the social media handler of a company/brand. Please act as one

tears loading

k2fresh:
All 3 actually suggested two 220ah battery for the battery setup,they said it would hold up since the store is mostly opened during the day.

odimbannamdi:


Why do you keep using the exclamation mark (!) in your posts? It means you are yelling at the person you are responding to. You are the social media handler of a company/brand. Please act as one

Oga to God who made me, it none about that. I’m sorry if I made you uncomfortable with using the exclamation mark (!). Cheers 😊

dollarnaira:


Sorry o but how on earth will one overcharge a battery with a right charger bms or no bms?

Cc cannot overcharge your battery with right setting.

For cells to go swollen due to overcharge must be an extreme negligence. Few minutes of overcharge does not translate to instant swollen/damage. Your friend must have been charging at higher amp and voltage over a long period of time.

Note too than bms can fail too. So while charging at the right voltage, a bms is now another form of protection along with it.

Haba e never reach "rebuild house stuff". For LifePO4 to result into fire bro, YOU MUST HAVE ABUSED ABUSED ABUSED. If you talk of lithium ion now enhen body go shake. Don't let internet YouTube guys add fear to your spin.

Fake lithium ion can easily burn but u see those original branded ones, they are built not to catch fire unless u abuse dem extremely. I have deliberately charge a Samsung 26J lithium ion cell to 5v according to the data sheet. It gets hots but no fire bc it was just close to an hour. Since more fake are in the market, you hear of more fire fire fire over the internet.

We all drive in vehicles that store petrol but still comfortable with them despite the dangers.

You can overcharge your cells if you don't have a BMS attached and your cells are not balanced. The BMS is not only for over and under voltage protection but also cell balancing

adewasco2k:
Please guys, can i use AVR to solve this issue i am havingon my system?

i initially had a 6kva hybrid inverter but some times when some appliances are turned on, the surge will trip the inverter off and shows error 07, i upgrated the inverter to 10kva then when such surge happens it was the battery BMS that trips off because its a 150A BMS, i changed the BMS to 200A now when such happens its starting to trip off the inverter again but now with error 09, its just all frustrating and i know i will need to get an inverter that can handle such a surge like a transformer base inverter like TBB inverter.


But i am just thinking if there is a way around it before i garther the money to change the inverter.

Note: is a welion 10.2kva inverter

What does error 07 and error 09 refer to ?

adewasco2k:



its a cafè,

ice cream machine
2 chillers
1 2hp LG black mirror AC
1 deep freezer
Shawarma toaster machine (this seems to be the problem when turned on)


when the BMS started tripping off the battery plug suggested i change the BMS from 150A to 200A which i did and so far it doesnt trip off only now the inverter trips off.

At installation i installed a breaker on the output of the inverter but it kept breaking so i had to by it

What was the breaker rating ?

All these seems like guess work. Do you actually know the maximum instantaneous load you use? Also including surge ?
Even If you really want to go the tbb route, you must have an idea of your load in order to determine what would fit rather than doing another trial and error.

Penuelseun:
You can overcharge your cells if you don't have a BMS attached and your cells are not balanced. The BMS is not only for over and under voltage protection but also cell balancing

This is the most important function of the BMS especially because the cells are connected in series. That's why lead acid 24V, 48V usually failed early and we tried adding battery balancers as watchdog back in the days.

dollarnaira:


Sorry o but how on earth will one overcharge a battery with a right charger bms or no bms?

Cc cannot overcharge your battery with right setting.

For cells to go swollen due to overcharge must be an extreme negligence. Few minutes of overcharge does not translate to instant swollen/damage. Your friend must have been charging at higher amp and voltage over a long period of time.

This happened over many months, not just a single day of overcharging issue. He was using a rectifier to charge the batteries. I mentioned it in my original post. It's 280ah and I can't really say it's high current charging that was the issue, even though it was two combined rectifier to give 100A that he used during that period. Issue is had he used a BMS he won't be needing to replace these cells.

mctfopt:



This happened over many months, not just a single day of overcharging issue. He was using a rectifier to charge the batteries. I mentioned it in my original post. It's 280ah and I can't really say it's high current charging that was the issue, even though it was two combined rectifier to give 100A that he used during that period. Issue is had he used a BMS he won't be needing to replace these cells.

Exactly my point wrong charging voltage not because there was no bms. Bms would have saved him though with the wrong charger.

Penuelseun:
You can overcharge your cells if you don't have a BMS attached and your cells are not balanced. The BMS is not only for over and under voltage protection but also cell balancing

Most bms contain ive balancers.
If you depend on a hard wired bms to balance your na story oo. Best bms if at all I need any is smart bms aka Bluetooth bms with adequate amp to balance cells.

You can't overcharge your cells with right charger. Your : cc, buck converters, bench chargers are forms of bms ( battery managers). The question is, can a cc for example set at the right voltage overcharge any cell? Point of notice, I don't go against bms s oo but don't make it sound that a system is going to result into fire without them. Mind you, bms can fail too.

Juror:


This is the most important function of the BMS especially because the cells are connected in series. That's why lead acid 24V, 48V usually failed early and we tried adding battery balancers as watchdog back in the days.

True

dollarnaira:


Exactly my point wrong charging voltage not because there was no bms. Bms would have saved him though with the wrong charger.

You still need a BMS, he still uses this charger even now but with a BMs. Wrong charging voltage wasn't the issue here. You need a BMS to avoid cells going out of sync and getting overcharged.

Moral of all these stories is to use a BMS with every kind of charger.

But you can always do you. Your house your rules. Cheers

dollarnaira:


Most bms contain ive balancers.
If you depend on a hard wired bms to balance your na story oo. Best bms if at all I need any is smart bms aka Bluetooth bms with adequate amp to balance cells.

You can't overcharge your cells with right charger. Your : cc, buck converters, bench chargers are forms of bms ( battery managers). The question is, can a cc for example set at the right voltage overcharge any cell? Point of notice, I don't go against bms s oo but don't make it sound that a system is going to result into fire without them. Mind you, bms can fail too.

You can overcharge your cells even with the right charger in the absence of a BMS, for example I set my cc to 27.8v for a 24v system, in the absence of a BMS, one of the cells can get to 3.65v while the rest are still at 3.44v thereby leading to cell over voltage conditions which the BMS protects against such. A smart BMS with an active balancer is your surest bet.

Does felicity have an official site for ordering in Nigeria?

mctfopt:


You still need a BMS, he still uses this charger even now but with a BMs. Wrong charging voltage wasn't the issue here. You need a BMS to avoid cells going out of sync and getting overcharged.

Moral of all these stories is to use a BMS with every kind of charger.

But you can always do you. Your house your rules. Cheers

Very very true.
I prefer an active balancer instead.

Penuelseun:
You can overcharge your cells even with the right charger in the absence of a BMS, for example I set my cc to 27.8v for a 24v system, in the absence of a BMS, one of the cells can get to 3.65v while the rest are still at 3.44v thereby leading to cell over voltage conditions which the BMS protects against such. A smart BMS with an active balancer is your surest bet.

True but
Bms with active balance not ive.
To be fully free : get a dedicated active balance.

Wen I will eventually leave my 12v system, I will either shoot a 24v or 48v system with :

Smart active balancer
Smart bms
Growatt inverter

dollarnaira:


Very very true.
I prefer an active balancer instead.

Some BMS comes with one. I think 2A is okay. I use JK with 2A active balance current. Keeps my cells balanced.

mctfopt:


Some BMS comes with one. I think 2A is okay. I use JK with 2A active balance current. Keeps my cells balanced.

Nice but yours is smart.
All this AliExpres cheap hard wired bms are no bms. Most of them are ive.