ojeysky:


Naa ignore the min voltage, it occurred when I needed to do some maintenance and disconnected first set of the cells from the BMS(ANT BMS), the BMV was fast to capture the voltage of the remaining cells before I disconnected the rest. Unfortunately there is no way to reset just a data point on BMV without resetting everything so I lived with it. The max voltage is also not what I use normally (I do 27.6v), there was an event to that as well

Most small Indian inverter (luminous, sukam,etc) charge at maximum of 27.5v for the 24v system. Which means one can charge lithium with it without any additional stress except to add a BMS. Ok course you get to miss out on those other bells and whistles of the premium inverters.

ojeysky:
That happened due to cell imbalance, one of the cells got to the low cut off voltage of the BMS (usually 2.5v for LFP some set higher but below 3v) for a balanced cell pack, the voltage indeed does the indicate the battery SOC, it's more accurate with no load.

Higher than 2.5v is cool, reason I prefer programmable BMS. Preset can be set to as low as 2.1v... I think 2.7 to 2.8 should be ok. Or if you love playing it safe do 3v and 3.4v for the upper threshold which you are already doing.

ojeysky:


That happened due to cell imbalance, one of the cells got to the low cut off voltage of the BMS (usually 2.5v for LFP some set higher but below 3v) for a balanced cell pack, the voltage indeed does the indicate the battery SOC, it's more accurate with no load.

Yeah, was about saying that.
The big achilles heel of ready made drop in lifepo4 banks.
And usually people that buy the dropins dont hv the skills to open it up and attempt a rebalance, hence the balance issue will get worse n worse till a 120ah bank turns to 40ah, and owner losses faith in lifepo4 batts.

Deep discharges is one of the major causes of early imbalance

Cell imbalance is one probable cause, another is the effects of PSOC on the voltage profile. My money is on PSOC as these cells were less than 1 week in production and had deeper discharges before that day with no trouble.

Problems started when client used no PHCN for 2 days straight with full loads and like 5 hours gen time.

Lithiums have a very narrow working voltage band vs other lead acid chemistries. Most are really only taking in appreciable energy at the upper voltage ranges.

This is why a regular full charge or at least getting into the 90% SoC window is key so that the BMS can calibrate properly

ojeysky:


That happened due to cell imbalance, one of the cells got to the low cut off voltage of the BMS (usually 2.5v for LFP some set higher but below 3v) for a balanced cell pack, the voltage indeed does the indicate the battery SOC, it's more accurate with no load.

I got this today, following your recommendation.
I hope it will serve me and I will enjoy it too.

The price has now increased to ₦108500

Valto:
i recently acquired this TBB POWER 10kva servo stablizer. its rugged and efficient.wall mountable type. 80V to 270V. it is very much affordable. u can get it below 100k.

In reading the manual, the battery wiring diagram seemed to indicate that for two batteries in parallel, it was okay to connect only one battery to the busbar or inverter.

So you put battery A and B in parallel via their +ve and -ve terminals and connect to busbar from either battery A only or battery B only whereas conventional wisdom is to take +ve to busbar from one battery and -ve to busbar from the other battery.

In any case the cables that come supplied are too short to be much use.

Perhaps they believe the BMS and inbuilt balancer would even out any issues.

3.6v and above is rather highly charged for 3.2v nominal LFP. I like to top out at 3.5v. Bad things start to happen if an LFP cell is too highly charged

Did you manage to examine the BMS you ripped out of the Felicity? Are any comms or user mods/tweaks possible?

adrusa:


I don't understand the part about wiring being off. Kindly explain.

On the charging, the nominal voltages of LFP cell are 3.2v, 12.8v, 25.6v or 51.2v. The maximum recommended charging voltages are 3.65v, 14.6v, 29.2v and 58.4v. So, Felicity charge voltage looks okay to me.

NiyiOmoIyunade:
In reading the manual, the battery wiring diagram seemed to indicate that for two batteries in parallel, it was okay to connect only one battery to the busbar or inverter.

So you put battery A and B in parallel via their +ve and -ve terminals and connect to busbar from either battery A only or battery B only whereas conventional wisdom is to take +ve to busbar from one battery and -ve to busbar from the other battery.

In any case the cables that come supplied are too short to be much use.

Perhaps they believe the BMS and inbuilt balancer would even out any issues.

3.6v and above is rather highly charged for 3.2v nominal LFP. I like to top out at 3.5v. Bad things start to happen if an LFP cell is too highly charged

Did you manage to examine the BMS you ripped out of the Felicity? Are any comms or user mods/tweaks possible?

There are two communication ports RS485 I guess, but Felicity supplies no software for any of their products, so we are left to search for the original products they cloned. I have been wondering if their BMS is cloned from pylontech or BYD. I'm still investigating.

On the wiring in parallel, I support your opinion that their BMS and communication between the batteries will even out the outputs.

NiyiOmoIyunade:
Pertinent to note that voltage is not an accurate representation of state of charge and this is even more the case for most Lithium chemistries especially at partial state of charge.

I witnessed a Felicity Lithium pack go off at 50.2v after two days of low charge. One would have thought at least 30% capacity left at that voltage but the BMS tripped things off.

Actually, using voltage to gauge lithium battery capacity is a lot more accurate than for lead acid. But, the point is taken that coulomb counting is the best way to gauge any battery capacity.

Tolutopsy:
I got this today, following your recommendation.
I hope it will serve me and I will enjoy it too.

The price has now increased to ₦108500

it will serve u well bro. mine has been working perfectly, i av once loaded it up with a 6000w load and it worked flawlessly. as for price, u wouldn't blame them, exchange rates are high this days. other similar brands are above 140k now.

I am really eager to lay hands on that Felicity BMS and interrogate it thoroughly via serial port.

I believe we will share many happy times and have many long talks where the BMS will tell me all it knows and all it has gone through.

I see an opportunity to speak to the BMS and make it obey custom LVDs and so on - there is significant commercial advantage here with increased demand for relatively cheap Lithium batteries which can be paired with an average inverter that has no customizable LVD.

A better value drop in replacement for lead acid if only one could tweak the BMS LVD to safer levels - right now one is being forced to contrive external disconnect arrangements to operate the battery within safe limits and keep the system stable.

adrusa:


There are two communication ports RS485 I guess, but Felicity supplies no software for any of their products, so we are left to search for the original products they cloned. I have been wondering if their BMS is cloned from pylontech or BYD. I'm still investigating.

On the wiring in parallel, I support your opinion that their BMS and communication between the batteries will even out the outputs.

NiyiOmoIyunade:
I am really eager to lay hands on that Felicity BMS and interrogate it thoroughly via serial port.

I believe we will share many happy times and have many long talks where the BMS will tell me all it knows and all it has gone through.

I see an opportunity to speak to the BMS and make it obey custom LVDs and so on - there is significant commercial advantage here with increased demand for relatively cheap Lithium batteries which can be paired with an average inverter that has no customizable LVD.

A better value drop in replacement for lead acid if only one could tweak the BMS LVD to safer levels - right now one is being forced to contrive external disconnect arrangements to operate the battery within safe limits and keep the system stable.

If I didn't know what a BMS was, I would have thought it was a human being from the way you wrote that.

Lolz.

Those devices can sometimes take on a life of their own especially when they stubbornly refuse to communicate with you or obey your commands.

eleojo23:


If I didn't know what a BMS was, I would have thought it was a human being from the way you wrote that.

eleojo23:


If I didn't know what a BMS was, I would have thought it was a human being from the way you wrote that.

Remind me of a friend that refers to machines as guys. "This guy won't just come up." Lol

Yeah, at that price it's still cheaper than the rest.

I'm grateful thanks.

Valto:
it will serve u well bro. mine has been working perfectly, i av once loaded it up with a 6000w load and it worked flawlessly. as for price, u wouldn't blame them, exchange rates are high this days. other similar brands are above 140k now.

Hello gurus in the house, I have a puzzling issue. I got a used 2.5kva/36volts genus inverter from someone relocating out of town who insists it is working perfectly.However,when connected to 3 ,12volts 105 ritar batteries in series it doesn't work,just making intermittent beeping sound.I read somewhere that recommended battery is 120ah-200ah.Could this be the problem or the inverter is faulty?

omotoda:
Hello gurus in the house, I have a puzzling issue. I got a used 2.5kva/36volts genus inverter from someone relocating out of town who insists it is working perfectly.However,when connected to 3 ,12volts 105 ritar batteries in series it doesn't work,just making intermittent beeping sound.I read somewhere that recommended battery is 120ah-200ah.Could this be the problem or the inverter is faulty?

If you are sure you connected them well in series and the batteries have some charge left, then inverter might be faulty. Even a12v 50ah battery in series for 36v will power a inverter, unless I'm missing something

Please I have luminous 850va hybrid inverter and I have 2(300wats) solar panel, will it work if connect it directly to inverter as I did not have money for CC now

abbeymighty:
Please I have luminous 850va hybrid inverter and I have 2(300wats) solar panel, will it work if connect it directly to inverter as I did not have money for CC now

Yes, it will work, just not that efficiently as the inverter's inbuilt cc is pwm

abbeymighty:
Please I have luminous 850va hybrid inverter and I have 2(300wats) solar panel, will it work if connect it directly to inverter as I did not have money for CC now

Hmm. Noted

Penuelseun:
Yes, it will work, just not that efficiently as the inverter's inbuilt cc is pwm

thank you

Guys,

Guys, any idea why my Luminous inverter keeps showing this bt error code and how it can be resolved?

It comes on when i try charging it, but it works and supplies current to the house when i put it on

odimbannamdi:
Guys,

Guys, any idea why my Luminous inverter keeps showing this bt error code and how it can be resolved?

It comes on when i try charging it, but it works and supplies current to the house when i put it on

There's no power coming into the inverter, it's showing its on battery mode...

Avr and current limiter - 8k

set current from 1-60amps
set voltage from 145v to 300v


DC breaker 63a single pole - 2k
DC breaker 40a single pole - 2k
DC breaker 32a single pole - 2k

Call - 08117398294
Chat - http:///2348117398294

Check the breaker behind the inverter if it's off.

odimbannamdi:
Guys,

Guys, any idea why my Luminous inverter keeps showing this bt error code and how it can be resolved?

It comes on when i try charging it, but it works and supplies current to the house when i put it on

saint2ace:


There's no power coming into the inverter, it's showing its on battery mode...

Thanks for the directions over the phone last night, boss. You were most helpful. The problem was the breaker behind the inverter. It had tripped. So, i put it back on and it began charging again
Thanks sir

ebocoms:
Check the breaker behind the inverter if it's off.

Exactly! It was the breaker that tripped. As soon as i put it back on, it began charging. Thank you sir. Hopefully, in the future, people that experience that kind of issue will know how i resolved it

Introducing our new lumiax mppt 40a 12v/24v controller.
Supports mobile app for real time monitoring and parameter settings.
Lithium battery profile supported.

Price - 60k

- innovative max power point tracking technology with trackin efficiency of 99.9%
- real time energy statistics function.
- support lithium, flooded, gel and AGM.
- 4 stage charging: bulk, absorb, float and equalize function.
- iot wireless communication and Bluetooth.
- monthly data and graphical display.
- pv short circuit protection,pv over current protection, pv reverse polarity protection.
- battery reverse polarity protection, battery over voltage protection.

Namzy:

If you are sure you connected them well in series and the batteries have some charge left, then inverter might be faulty. Even a12v 50ah battery in series for 36v will power a inverter, unless I'm missing something

Thanks .I did the connection myself this morning and it worked fine!!

zeestone99:
Introducing our new lumiax mppt 40a 12v/24v controller.
Supports mobile app for real time monitoring and parameter settings.
Lithium battery profile supported.

Price - 60k

- innovative max power point tracking technology with trackin efficiency of 99.9%
- real time energy statistics function.
- support lithium, flooded, gel and AGM.
- 4 stage charging: bulk, absorb, float and equalize function.
- iot wireless communication and Bluetooth.
- monthly data and graphical display.
- pv short circuit protection,pv over current protection, pv reverse polarity protection.
- battery reverse polarity protection, battery over voltage protection.

Monitor your devices. No more guess work.
40amps and 60amps available
Limited quantity available.

Call us To order now.

Call - 08117398294
Chat -. Http:///2348117398294

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Namzy:

If you are sure you connected them well in series and the batteries have some charge left, then inverter might be faulty. Even a12v 50ah battery in series for 36v will power a inverter, unless I'm missing something

Thank you jare ,its fine now.I don't know what my installer did that gave the error. After the initial owner convinced me it was working 100%, I decided to do it myself this morning and it worked perfectly.

abbeymighty:
Please I need a competent installer for solar panel installation around ikorodu.

Call us for professional installation

Call - 08117398294
Chat - http:///2348117398294

Kindly call us for a tailored solution.

Contact on profile.

Hope to hear from you soon

abbeymighty:
Please I need a competent installer for solar panel installation around ikorodu.