ojeysky:


While you can discharge a Lifepo4 to 100% capacity without major issues, it's not applicable to the voltage. If the voltage gets below 2.5v then the battery is toast. It's certainly doesn't look correct to me that you can discharge a Lifepo4 to bear 0 volts but you can discharge to hear zero capacity so long as you are still within the 3.6 to 2.5 band



Lifepo4 is one of the most interesting to put together, just like the lead acid indeed. Just don't mix up the series/parallel arrangement of the cells.

There is also one Specification sheet i saw of Lifepo4

It agrees with you submission

End of discharge voltage 2.5V

The 3.6V you talk about is it the Full charge limit


Am i correct

Lifepo4 for a 12V Bank

Normal Voltage 3.2V x4=12.8V

Full charge voltage 3.6Vx4=14.4V

Discharge limits voltage 2.5vx4=10V

spartacus11:


4pcs of the Battery 3.2*4=12.8V

How much for the BMS

I don't have commercial quantity for now

JUO:
I don't have commercial quantity for now

The Battery or the BMS?

spartacus11:


The Battery or the BMS?

bms

JUO:
bms

Ok so we will deal on the lifepo4 battery

spartacus11:


I had to check up the 2 battery u listed Battleborn and ruixu omo Lead Acid fall our hand ohhhh

See lithium dey blaze

Lead acid was able to pish to 67Ah why lifepo4 dey do 93Ah and 95Ah


https://www.youtube.com/watch?v=WVxvBkeY0UY

Just imagine the level of inefficiency in lead acid. Apart from the fact that recommended discharge level of lead acid is 50% to get reasonable cycle out of it, you loose additional 10 to 15% due to Peukert effect. So when we say that a 100AH Lifepo4 is equal to or more than a 200AH lead acid[b] in practice[/b] I don't think we will be exaggerating

spartacus11:


There is also one Specification sheet i saw of Lifepo4

It agrees with you submission

End of discharge voltage 2.5V

The 3.6V you talk about is it the Full charge limit


Am i correct

Lifepo4 for a 12V Bank

Normal Voltage 3.2V x4=12.8V

Full charge voltage 3.6Vx4=14.4V

Discharge limits voltage 2.5vx4=10V

You are correct except that it's not a full charge voltage but rather a charge voltage (bulk voltage or in lithium terms Constant voltage CV). This is typically charging the cells at voltage higher than the resting voltage in other to get enough amps in as the CC set-up permits. So you can charge a Lifepo4 up to 3.65v but the eventual resting voltage when it's full is about 3.35v..I personally don't charge up to 3.65 as it's not necessary, anything from 3.45 bulk will get your cells charged to at least 90% capacity.
I use the following at the moment for my 24v (due to solar CC float bug issues that puts my system into early float)

Bulk - 28.2
Float - 27.2 (note that you really don't need a float for LFP but I can't disable it unfortunately)
Battery cutoff - 24v

If you are only charging from utility your bulk would be fine at 27.6v.

Note for a 12v system you don't want to discharge to 10v, I suggest you stick with 12v as the minimum. If your system permits, 12.5v low disconnect is better. By the time you are at 3v per cell, you've already taken over 90% out of the battery

adrusa:


I have no regret investing in these "cheap" Lithium. I can not pay the price people are asking for pylontech, BYD or Battleborn. I'm a poor civil servant.

Right, you don't even need to be poor to go the efficient and reasonable route; If I can get double capacity of pylontech at same cost, why not. Nevertheless I commend those that use the fancy plyontech as well as they have their reasons... It's just a case of one man's food(breakfast) is another man's food (dinner) but not another man's poison. All na food/LFP eventually

I can corroborate these results - about 5.7KwH discharged from a 7.5KwH rated battery based on field testing by another nairaland user (E-Phaim Energy/Pharyn).

So really a nominal 48v 125Ah battery of which one can access 48v 110Ah.

If 5.7KwH represents 90% DoD then the true battery capacity is about 6KwH to 6.5KwH I believe.

The bigger issue then is whether such a battery will live up to its 3,000cycles claimed life span - one can sacrifice some capacity at that low price point but battery longevity and long term stability and reliability I will not so happily sacrifice.

I would like to know for certain approximately when the battery would croak or have lost up to 20% capacity and sadly that may be data that will only be available in a few years.

adrusa:
I bought the 48v Felicity lithium and my first impression is not good. I tried to do a test drain overnight. It gave me about 90AH drain overnight. I then set my Water Pump on it to drain it further. I got to about 115AH when my inverter shutdown at about 49v. I wasn't sure which shut down first, my inverter or the battery. But the battery was still (or back) on when I checked. At this point, I can not recommend this battery based on expected AH output.

GeorgeD1:
suddenly it feels like dry season all over again.
with daily harvests topping 42kwh and instantaneous breaking the 10kw barrier....
indeed, the sun is the answer!

Hello GeorgeD1,

After this your post I went hunting for the Morningstar CC that offers 200A and could not find. Could you please educate us on how you achieved the 190A showing on your screen? A lot of us are willing to learn.

While at it what's your cable size for such an amperage. Thanks. I'm also interested in the number and rating of panels that can give above 10kw instantaneous.

spartacus11:


Ok so we will deal on the lifepo4 battery

after a brief test of these little batteries, I am thinking of not selling anymore. They performed beyond my expectations. Imagine this little thing with some much juice without full charge

essegis:


Hello GeorgeD1,

After this your post I went hunting for the Morningstar CC that offers 200A and could not find. Could you please educate us on how you achieved the 190A showing on your screen? A lot of us are willing to learn.

While at it what's your cable size for such an amperage. Thanks. I'm also interested in the number and rating of panels that can give above 10kw instantaneous.

I know he has 4 cc. Oga please come and explain more we are waiting. I pray make I no thief because of you

I believe the secret lies in a little known product called the MorningStar MeterHub - it allows you to connect up to 15 charge controllers or other devices to thesame MeterHub network and display the aggregate results on just one meter.

Oga GeorgeD is aggregating the output from all his four charge controllers into one single display - which in my opinion is the smart way to do it.

essegis:


Hello GeorgeD1,

After this your post I went hunting for the Morningstar CC that offers 200A and could not find. Could you please educate us on how you achieved the 190A showing on your screen? A lot of us are willing to learn.

While at it what's your cable size for such an amperage. Thanks. I'm also interested in the number and rating of panels that can give above 10kw instantaneous.

JUO:
I know he has 4 cc. Oga please come and explain more we are waiting. I pray make I no thief because of you

Braaad:


Hello, do you by any chance have replacement control board for the magnum (MS4124)??

Yes it's available

07033311179

NiyiOmoIyunade:
I believe the secret lies in a little known product called the MorningStar MeterHub - it allows you to connect up to 15 charge controllers or other devices to thesame MeterHub network and display the aggregate results on just one meter.

Oga GeorgeD is aggregating the output from all his four charge controllers into one single display - which in my opinion is the smart way to do it.

Thanks for this. This has gone a long way answering my question. But how many panels do you think he combined together to achieve this kinda output.

Without any analytical rigor 12kw to 15kw of panels could produce 10kw of output if the conditions are right - clear skies, sunny day, proper array orientation, large enough loads and sufficiently hungry battery - if all these variables collide then 10kw instantaneous is feasible.

I recall hearing that Oga GeorgeD has a very huge battery bank as well sufficient to easily need and sink so much solar juice - I will let him do justice to his system details.

Meanwhile I have a 19kw array that should go live next week - the array will feed multiple large loads and 40kwh of PylonTech storage - I should be in a position to post live system stats and pictures at that time.

I also have 60A MorningStar MPPT for sale - brand new in factory seal in case you are interested or Oga George wants a spare - despite the move in exchange rates, I will cut anyone who asks a sweet deal at the old market price

essegis:


Thanks for this. This has gone a long way answering my question. But how many panels do you think he combined together to achieve this kinda output.

essegis:


Thanks for this. This has gone a long way answering my question. But how many panels do you think he combined together to achieve this kinda output.

he has 24pcs before we added another 24pcs. Let him confirm the watts

NiyiOmoIyunade:
Without any analytical rigor 12kw to 15kw of panels could produce 10kw of output if the conditions are right - clear skies, sunny day, proper array orientation, large enough loads and sufficiently hungry battery - if all these variables collide then 10kw instantaneous is feasible.

I recall hearing that Oga GeorgeD has a very huge battery bank as well sufficient to easily need and sink so much solar juice - I will let him do justice to his system details.

Meanwhile I have a 19kw array that should go live next week - the array will feed multiple large loads and 40kwh of PylonTech storage - I should be in a position to post live system stats and pictures at that time.

I also have 60A MorningStar MPPT for sale - brand new in factory seal in case you are interested or Oga George wants a spare - despite the move in exchange rates, I will cut anyone who asks a sweet deal at the old market price

Thanks.

I stand gidigba for ground for your stats & updates. How much you wan fling that MorningStar? Can it work with Lithium or person need specialised tool to set it up.

JUO:
he has 24pcs before we added another 24pcs. Let him confirm the watts

Thanks

ojeysky:


Just imagine the level of inefficiency in lead acid. Apart from the fact that recommended discharge level of lead acid is 50% to get reasonable cycle out of it, you loose additional 10 to 15% due to Peukert effect. So when we say that a 100AH Lifepo4 is equal to or more than a 200AH lead acid[b] in practice[/b] I don't think we will be exaggerating

Now you see why i have been shouting lithium since last night, i was thinking of buying lead acid again ohh, my brother it is pure waste

If i can't get JUO deal on the lifepo4 i pray i do, na to connect with the guy that did you own be that.

I am putting funds together already

Money yab me when that ur deal was up. Lithium here we come

ojeysky:


You are correct except that it's not a full charge voltage but rather a charge voltage (bulk voltage or in lithium terms Constant voltage CV). This is typically charging the cells at voltage higher than the resting voltage in other to get enough amps in as the CC set-up permits. So you can charge a Lifepo4 up to 3.65v but the eventual resting voltage when it's full is about 3.35v..I personally don't charge up to 3.65 as it's not necessary, anything from 3.45 bulk will get your cells charged to at least 90% capacity.
I use the following at the moment for my 24v (due to solar CC float bug issues that puts my system into early float)

Bulk - 28.2
Float - 27.2 (note that you really don't need a float for LFP but I can't disable it unfortunately)
Battery cutoff - 24v

If you are only charging from utility your bulk would be fine at 27.6v.

Note for a 12v system you don't want to discharge to 10v, I suggest you stick with 12v at the minimum. If your system permits, 12.5v low disconnect is better. By the time you are at 3v per cell, you've already taken over 90% out of the battery

Ok so in calculating

Normal voltage 3.2V i.e 3.2x4

Or the

Resting Voltage 3.3V i.e 3.3Vx4

I will work on adding solar to the set up later, how many Watts panel do you think i need to plan for since i am going for the 12V lifepo4 bank

But i think i will start with Nepa changing first, bcus of Budget limitation, so what type of charger will you recommend?

This is the inverter i will be buying the 12V 4000W which is actually 1800-2000W in reality, its budget friendly and the review online seems to show it sine wave is actually clean

JUO:
after a brief test of these little batteries, I am thinking of not selling anymore. They performed beyond my expectations. Imagine this little thing with some much juice without full charge

U be business man, u go sell na make i put ur money together first

Or na Idaboski go settle our matter

NiyiOmoIyunade:
Without any analytical rigor 12kw to 15kw of panels could produce 10kw of output if the conditions are right - clear skies, sunny day, proper array orientation, large enough loads and sufficiently hungry battery - if all these variables collide then 10kw instantaneous is feasible.

I also have 60A MorningStar MPPT for sale - brand new in factory seal in case you are interested or Oga George wants a spare - despite the move in exchange rates, I will cut anyone who asks a sweet deal at the old market price

ahhh, boss, you never sell that my morning star mppt cc
twas only 15k abi 20k that stood btw us and that deal then..

am still interested if its still available.

ihave observed 1804w from a 1680w (6 x 280w yingli panels) array, about 2wks ago, dropped to 1795w and held steady for over 3minutes.
this was hooked to a 25k 60amps powmr cc

earthrealm:


ahhh, boss, you never sell that my morning star mppt cc
twas only 15k abi 20k that stood btw us and that deal then..

am still interested if its still available.

ihave observed 1804w from a 1680w (6 x 280w yingli panels) array, about 2wks ago, dropped to 1795w and held steady for over 3minutes.
this was hooked to a 25k 60amps powmr cc

Is your battery bank lithium or lead acid? 12V or 24V

spartacus11:


Is your battery bank lithium or lead acid? 12V or 24V

The setup is 12v x 4 200ah Fla, 5yrs plus old....48v inverter

spartacus11:


Ok so in calculating

Normal voltage 3.2V i.e 3.2x4

Or the

Resting Voltage 3.3V i.e 3.3Vx4

I will work on adding solar to the set up later, how many Watts panel do you think i need to plan for since i am going for the 12V lifepo4 bank

But i think i will start with Nepa changing first, bcus of Budget limitation, so what type of charger will you recommend?

This is the inverter i will be buying the 12V 4000W which is actually 1800-2000W in reality, its budget friendly and the review online seems to show it sine wave is actually clean

Nominal voltage is 3.2, resting voltage is the voltage when the battery is not charging and not on load. That can be anything, but the figure when it's full should be around 3.35.

If you are doing 12v, you can get the makesky CC or any other MPPT controller. The inverter you are buying is okay, but if it has inbuilt charger, don't use to charge via utility as it not meant for LFP. I currently only have 24v LFP chargers may have a few more 12v in future but you can check jiji for those (if you are lucky)

Regards

earthrealm:


The setup is 12v x 4 200ah Fla, 5yrs plus old....48v inverter

Wow that's great 5Years amazing thats 48V 200Ah bank

spartacus11:


U be business man, u go sell na make i put ur money together first

Or na Idaboski go settle our matter

first test. I think is better to stop at 3.1v. Let me observe the voltage after 3.1v

ojeysky:


Nominal voltage is 3.2, resting voltage is the voltage when the battery is not charging and not on load. That can be anything, but the figure when it's full should be around 3.35.

If you are doing 12v, you can get the makesky CC or any other MPPT controller. The inverter you are buying is okay, but if it has inbuilt charger, don't use to charge via utility as it not meant for LFP. I currently only have 24v LFP chargers may have a few more 12v in future but you can check jiji for those (if you are lucky)

Regards

Ok thanks my initial plan was to go 24V but lead acid, since i am going lifepo4 i had to settle for the 12V

The inverter does not have inbuilt charger it is a stand alone inverter

Ok the makeskyblue 40A or 60 which will be better as i don't want to use more than 4 panels 250-360w panel because of space, make landlord nor go vex for the roof mata

I will search for the 12V LFP charger

JUO:
first test. I think is better to stop at 3.1v. Let me observe the voltage after 3.1v

Wow this thing sweet , 1274Wh is it the juice you have used out of the system? I am in love with this

Please which meter is this that is displaying the battery and usage info

spartacus11:


Wow this thing sweet , 1274Wh is it the juice you have used out of the system? Yes
I am in love with this

Please which meter is this that is displaying the battery and usage info

dc watts meter. Battery was not even fully charged and I stopped at 3.2v