warning about ENERPROF.DE / ENERDAN battery&accesories

[tomtom81]

Hello, I want to share my experience with ENERPROF.DE and warn others about my issues with this company. Last year, on July 31st, I placed an order for two chargers (one 8-amp fast charger and one 5-amp charger) and a 48V 15S5P 20Ah LiFePO4 battery rated for 1440 watts at 48V with 30 amp bms. I installed a 30A fuse between the battery and my motor controller (a Bafang M620), and the fuse remained intact, so there’s no chance the controller drew more current than the battery was rated for. The total cost was €610.83.


The package arrived on September 13, 2024, but it had a hole in the lid, and the packaging tie was broken. After receiving my electric bike in November, I tested the battery and immediately noticed something was wrong. The fully charged battery should show a voltage close to 54V, but it only measured 50.3V with a universal power meter. The bike’s controller also showed the charge at only 73%.


I first contacted the company in mid-December via their online form. When I didn’t receive a response, I sent multiple emails and finally heard back on January 30, 2025. They asked me to send the battery back for analysis and repair. The battery was shipped on February 14, 2025, but upon its return, the issue was still not resolved. The battery only charged to 50V, and the Battery Management System (BMS) no longer displayed the charging status. The bike’s controller still showed a 70% charge, and when I tried using the bike, the battery shut off and the bike went dark. Before this, the bike worked, although the battery was never as good as new and didn’t level out properly. I used it around ten times, but I noticed the battery cells weren’t balancing, and the charge never increased over time, which ruled out any issues with the bike itself.


The company issued a receipt stating the battery was “repaired” by balancing the cells. However, anyone familiar with electronics knows that balancing cells doesn’t make the battery as good as new. This repair process has dragged on for over four months, and it’s caused me a lot of inconvenience. My electric bike is my only means of transport, especially for tasks like shopping, and I don’t have access to a car or home delivery services.


Although I have home and electric bike insurance, the warranty doesn’t cover batteries damaged during shipping, and the company’s slow response times have made the whole situation even more frustrating. They’ve tried to make me accept a faulty battery despite the significant amount of money I’ve invested. €610.83 is a lot for me, and I feel the company is not following proper consumer protection practices.


I’ve demanded a replacement battery several months ago, even before the battery went in for repair, but they refused. I’ve also asked for a full refund, though I would prefer a replacement. If I don’t get a new battery, a refund will likely be my next step. Based on consumer protection laws, I believe the company is obligated to provide a replacement or refund without unnecessary delays. They should know that balancing cells doesn’t fix a damaged battery—either the cells or the BMS were faulty from the beginning.


If anyone has suggestions for popular forums (in German or English) where I can share my experience, I’d appreciate it. I plan to warn other electric bike and EV communities about this manufacturer and will continue posting until I get the warranty battery I’m owed. I’ve already filed a complaint with the EU consumer department, and it is now being handled by officials.


For those interested, here’s the link to their website and battery i got 48V ENERpower LiFePO4 battery 15S (48V) 20Ah (960Wh) BMS 30A

 

[Sturmey]

I would be happier with a 40 Amp BMS so I would have some headroom as I think the M620 has a 30 Amp controller, so check if this is your case. The fact that the 30 Amp fuse did not blow doesn't really prove anything as a 30 amp fuse will often carry much more and possibly up to 60 amps for a period of time.
Best of luck.

PS Some LiFePO4 voltage chart shows a 100% charge after rest voltage of around 3.4v per cell ,so your 15S LiFePO4 battery fully charged may show about 51v if this is your case (you need to check this). This is different from the more popular Li-ion 13S 48v battery which reads up to 54.6 volts fully charged, so be aware of this as it may account for some of your voltage irregularities.

 

[endlessolli]

A german forum would be:

Pedelec-Forum

Willkommen im Pedelec-Forum, der besten Community für Elektrofahrrad-Enthusiasten. Finde Antworten, tausche dich aus und entdecke alles rund um Pedelecs. Jetzt beitreten!

www.pedelecforum.de

If I remember correctly someone from enerprof is (was?) also active on that forum. He went by the name Rutzky, if I remember correctly.
(I closed my account on that forum, because some people were pretty rude and right wing biased and nobody did anything against it. Just fyi and so you are prepared…)

 

[tomtom81]

I would be happier with a 40 Amp BMS so I would have some headroom as I think the M620 has a 30 Amp controller, so check if this is your case. The fact that the 30 Amp fuse did not blow doesn't really prove anything as a 30 amp fuse will often carry much more and possibly up to 60 amps for a period of time.
Best of luck.

PS Some LiFePO4 voltage chart shows a 100% charge after rest voltage of around 3.4v per cell ,so your 15S LiFePO4 battery fully charged may show about 51v if this is your case (you need to check this). This is different from the more popular Li-ion 13S 48v battery which reads up to 54.6 volts fully charged, so be aware of this as it may account for some of your voltage irregularities.

I Have checked The topped up voltage, its 54.2 volts on 30 bms version says that on their chart on enerdan, also The LCD screen of The ebike shows top wattage consumed at 1380 Watts Even steepest inclines and never gone past that, battery IS rated For 1440 contineus Watt, flat Car fuse what i Have IS 30amp contineus 40 AMP For minute before blow up and one second For 45 amps to blow up, m620 has 30 bms, like The battery has, but both can handle little spiking over 30 amp.

 

[tomtom81]

A german forum would be:

Pedelec-Forum

Willkommen im Pedelec-Forum, der besten Community für Elektrofahrrad-Enthusiasten. Finde Antworten, tausche dich aus und entdecke alles rund um Pedelecs. Jetzt beitreten!

www.pedelecforum.de

If I remember correctly someone from enerprof is (was?) also active on that forum. He went by the name Rutzky, if I remember correctly.
(I closed my account on that forum, because some people were pretty rude and right wing biased and nobody did anything against it. Just fyi and so you are prepared…)

IL consider, thx For warning

 

[Sturmey]

I Have checked The topped up voltage, its 54.2 volts on 30 bms version says that on their chart on enerdan, also The LCD screen of The ebike shows top wattage consumed at 1380 Watts Even steepest inclines and never gone past that, battery IS rated For 1440 contineus Watt, flat Car fuse what i Have IS 30amp contineus 40 AMP For minute before blow up and one second For 45 amps to blow up, m620 has 30 bms, like The battery has, but both can handle little spiking over 30 amp.

Re. the bad packing, there are many complaints about customs/security open parcels and not closing properly.
If that was my battery, I think I would turn down the controller power to 25 amps to have it less than the 30 amp BMS and try it out and see what range you can get from the full battery.. Maybe the battery is OK. Its worth a try before condemning it.
The LiFePO4 voltage (generally) drops very rapidly initially as shown below so it can be difficult to judge the capacity from the voltage. Is yours different?

 

[tomtom81]

Re. the bad packing, there are many complaints about customs/security open parcels and not closing properly.
If that was my battery, I think I would turn down the controller power to 25 amps to have it less than the 30 amp BMS and try it out and see what range you can get from the full battery.. Maybe the battery is OK. Its worth a try before condemning it.
The LiFePO4 voltage (generally) drops very rapidly initially as shown below so it can be difficult to judge the capacity from the voltage. Is yours different?

well the package had like straight punch hole through the cardboard of roughly 2-3 cm diameter and looked like some kind of square profile went through at angle of the package lid where is double cardboard layer, i took the picture of it right outside the courier drop off point when i picked up, but im lacking the skill to censor the label and my personal information on it, so i choosed not to post it with my forum writings, also there was not any label that it been opened by custom, not sure do EU do that though, but very weird style of seeing whats inside if it was custom. the controller of the m620 is locked due being CANBUS version, so i cannot change the parameters of the controller also as i said before in the first post that last time i hooked the battery after it came from repair, it shut down immediately also the charge indicator of the bms does not work anymore and only lights up when in charging as flickering when push down contineusly, so i dont know what the current range is, but before i send it for repair the range was roughly 30km, i calculated the theorical range of the system with chat gpt help and got mostly 5-10 km missing range when i gived all the parameters i could, i dont like have bike computer to measure road incline or wind meter to measure head wind, but after trying several styles by exaggerating certain values like the amount of inclines and the steepness of them and but extra weight to calculation and adjusted the wind being more than probably was, it came clear to me that it is very close to 15-20% range missing. also i dont know why should i turn the bms to 25 amps, as the motor only pulls up to 1380 watts max and the battery is advertized for motor up to 1440 watts contineus, i can see the watts consumed because i have this lcd what shows it in while i ride, when i tested the bike i did find all the steepest hills what i ride and noticed that it would always top up for the 1380 watts, 零部件 and my bike has been limited for max 25km/h as for speed so it dont draw even the therorical max amount of current, also how fast the current is dropping ? because im measuring it like couple seconds later when i take the charger off? here is their chart for the voltage

 

[Sturmey]

I wonder did they give you the right instructions as your battery is a 15S LiFePo4 and those instructions seem to be for Li-ion? By the way, there is a separate battery section in this forum so you might get better replies.

 

[tomtom81]

I wonder did they give you the right instructions as your battery is a 15S LiFePo4 and those instructions seem to be for Li-ion? By the way, there is a separate battery section in this forum so you might get better replies.

View attachment 368139

this is what chat gpt says about the full voltage as given the specs copy pasted from enerdan web site

Thanks for providing more details! It looks like you have a 15S5P LiFePO4 battery pack with the following specifications:

• Nominal Voltage: 48V (15S configuration, where each cell has a nominal voltage of 3.2V)
• Capacity: 20Ah
• Energy: Approx. 960Wh
• Continuous Discharge Current: 30A
• Maximum Charging Current: 8A
• Internal Resistance: < 70 mOhm
• Charging Voltage: 54V (15 x 3.65V)
• Final Discharge Voltage: 30V
• Weight: Approx. 6 kg

Let's break it down:​

1. Voltage:
   • You have 15S (15 cells in series), which gives you a nominal voltage of 48V (15 cells x 3.2V per cell).
   • When fully charged, the voltage can reach 54V (15 cells x 3.65V per cell).
2. Capacity:
   • With a 5P configuration, you have 5 cells in parallel for each series string. This increases the overall capacity.
   • Since each cell has a nominal capacity of 4Ah (assuming standard LiFePO4 cell capacity), for a 5P setup, the total capacity would be:
   Total Capacity=5×4 Ah=20 Ah\text{Total Capacity} = 5 \times 4 \, \text{Ah} = 20 \, \text{Ah}Total Capacity=5×4Ah=20Ah
   This matches your provided 20Ah capacity.
3. Energy:
   • The energy stored in the battery can be calculated using the formula:
   Energy (Wh)=Voltage (V)×Capacity (Ah)\text{Energy (Wh)} = \text{Voltage (V)} \times \text{Capacity (Ah)}Energy (Wh)=Voltage (V)×Capacity (Ah)
   For 48V nominal and 20Ah:
   Energy=48 V×20 Ah=960 Wh\text{Energy} = 48 \, \text{V} \times 20 \, \text{Ah} = 960 \, \text{Wh}Energy=48V×20Ah=960Wh
   This is consistent with your stated 960Wh energy capacity.
4. Discharge and Charge Characteristics:
   • Continuous Discharge Current: The pack can discharge at 30A continuously, which is good for high-power applications like electric vehicles or high-performance devices.
   • Maximum Charging Current: The battery can be charged at up to 8A, which is typical for LiFePO4 cells to ensure longevity and safe charging.
5. Internal Resistance:
   • With an internal resistance of < 70 mOhm, this pack will have relatively low losses during discharge, which helps maintain efficiency and prevents overheating.
6. Discharge Voltage:
   • The final discharge voltage is 30V (when the voltage per cell reaches around 2.0V), which is standard for LiFePO4 batteries, as discharging further could cause cell damage.
7. Weight:
   • The weight of the pack is 6 kg, which is fairly light for a 15S5P LiFePO4 pack with a capacity of 20Ah.

Summary of Key Specs:​

• Nominal Voltage: 48V
• Charging Voltage: 54V (fully charged)
• Final Discharge Voltage: 30V
• Capacity: 20Ah
• Energy: 960Wh
• Continuous Discharge: 30A
• Maximum Charging Current: 8A
• Internal Resistance: < 70 mOhm
• Weight: 6 kg

This battery pack is a solid option for applications requiring reliable, high-capacity, and safe energy storage, such as electric bikes, solar systems, or other off-grid applications. Let me know if you'd like to dive deeper into any of these aspects!



what is the voltage after charge when measured with general electric meter???

ChatGPT sanoi:​

When you measure the voltage of a fully charged LiFePO4 battery with a general electric meter (like a multimeter), you should expect to measure the fully charged voltage of the battery pack. For your specific 15S5P LiFePO4 pack, here's what you can expect:

• Nominal voltage per cell: 3.2V
• Fully charged voltage per cell: 3.65V (this is typical for LiFePO4 cells when fully charged)

Since you have 15 cells in series (15S), the voltage for the entire pack will be the sum of the voltages of each cell.

Voltage when fully charged:​

Fully charged voltage=15×3.65 V=54.75 V\text{Fully charged voltage} = 15 \times 3.65 \, \text{V} = 54.75 \, \text{V}Fully charged voltage=15×3.65V=54.75V
So, when fully charged, the voltage across the entire battery pack will be approximately 54.75V.

Measuring with a multimeter:​

When you use a general electric meter (multimeter), you will measure 54.75V (or close to it) across the terminals of the battery pack, assuming the battery is fully charged.

Important notes:​

• If you measure the voltage before the pack is fully charged, you will get a lower reading, which will gradually rise as the charging progresses.
• If the battery is discharged, the voltage will drop. Once it reaches about 48V nominal (or 3.2V per cell on average), it's considered "discharged," but you should avoid discharging the battery below the final discharge voltage of 30V (which is around 2.0V per cell).

So, fully charged and with a general electric meter, you should see around 54.75V.

 

[tomtom81]

A german forum would be:

Pedelec-Forum

Willkommen im Pedelec-Forum, der besten Community für Elektrofahrrad-Enthusiasten. Finde Antworten, tausche dich aus und entdecke alles rund um Pedelecs. Jetzt beitreten!

www.pedelecforum.de

If I remember correctly someone from enerprof is (was?) also active on that forum. He went by the name Rutzky, if I remember correctly.
(I closed my account on that forum, because some people were pretty rude and right wing biased and nobody did anything against it. Just fyi and so you are prepared…)

i made identical post to this web site you pointed to me and they wouldnt let me post it and put me 45min suspension, the reason was they dont want any stupidity?? from any firm? and i should write objectively, well before i made this post which is identical what is here but translated by chat gpt to german, i asked chat gpt to translate my writing to suitable form with good manners, i really dont know how can i write more objectively as i only state the facts and say that this has caused me lot of problems running my errands, maybe you could say better than google translate whats its all about? or maybe you could point me to another popular german ebike forum, iv tried to find more but it is very slow because of the translation even navigate forward in the site, i literally have to google every word on action buttons on forums and some sites seems to be almost dead.

 

[d8veh]

i made identical post to this web site you pointed to me and they wouldnt let me post it and put me 45min suspension, the reason was they dont want any stupidity?? from any firm? and i should write objectively, well before i made this post which is identical what is here but translated by chat gpt to german, i asked chat gpt to translate my writing to suitable form with good manners, i really dont know how can i write more objectively as i only state the facts and say that this has caused me lot of problems running my errands, maybe you could say better than google translate whats its all about? or maybe you could point me to another popular german ebike forum, iv tried to find more but it is very slow because of the translation even navigate forward in the site, i literally have to google every word on action buttons on forums and some sites seems to be almost dead.

Ranting verboten!
Honestly, you were ranting about the supplier, now you're ranting about the .De forum. You didn't really thank anybody here for the help they gave you. There's even indications of deriding it. Nobody is going to have sympathy for you, other than for your lack of being able to deal with problems in a rational way. My advice is to read what people wrote and try to understand it. Ask questions if you don't understand what they're saying instead of telling them useless facts.

 

[tomtom81]

Ranting verboten!
Honestly, you were ranting about the supplier, now you're ranting about the .De forum. You didn't really thank anybody here for the help they gave you. There's even indications of deriding it. Nobody is going to have sympathy for you, other than for your lack of being able to deal with problems in a rational way. My advice is to read what people wrote and try to understand it. Ask questions if you don't understand what they're saying instead of telling them useless facts.

i want to know how is my post ranting? in my opinion i posted facts what have happened as symptoms of the malfunctions battery, what kind of service i got from the supplier, reasons why i think it was malfunctioning and end result of trying to get new one from warranty, there is not much in the post else then saying im frustrated, thats hardly "ranting" and not thankin people is not true, i´v got several helpfull messages and i´v thank people who have helped me, i´m not going to thank people who claims against every data given from suplier other people in several ebike and ev forums who also stated that 50v end charge voltage is not normal for this battery also iv checked the math by A.I also. and im not here for sympathy, im here to warn people of their customer service and your writing tone as "nobody" "honestly"gives me impression that you are biased, how you can speak behalv everybody in the forum? and how i act irrational?? dont you think suplier should replace their products if they come to me as not working as advertized and its been four months from this, dont you think i should warn other people of their email ignorong and slow customer support?

if you refer of the voltage measured after charging then even the supplier dont agree with you, because its the reason why they took it for repair in first place, what wouldnt happen if would be normal to have 50.3 volts, and they told me this too, i guess you know better than people who make their battery.. maybe you have reading disability or something but my post have many times stated that in current state of battery is dead, i cannot get any reading from it from multimeter, nor the bms indicator seem to work and when hooked to ebike the ebike wont turn on, i cannot open the battery and remove the heat shrink around it because it will avoid the warranty, and not going to measure voltage from charging side as it has risk of damage the battery, all i can do is measure it from output side and as i told before i did not get any reading, today i got answer that they are waiting for response from their techician as eight days later when i again contacted them, if you have read european consumer laws you would know that their response time, repairing faulty battery instead handling that their own time and giving me replacement is against law, customer laws state that i should get refund or same kind of product with out delays, dont you think breaking consumer laws not worth notifying other people? should i just take loss of 420€ and start fiddling with battery what is under warranty? and loose my consumer rights? your being unnecessary rude, giving false info and it pretty much feels like trolling.

give example of ranting from my post and give me example how should edit my text because your writing are unhelpfull, your writing does not have any facts, any data any constructive critisim and it dont contribute to the post or the topic anyway, if you dont have anything else to say than personal attacks, stay out from other peoples post´s

 

[fill]

i made identical post to this web site you pointed to me and they wouldnt let me post it and put me 45min suspension, the reason was they dont want any stupidity?? from any firm? and i should write objectively, well before i made this post which is identical what is here but translated by chat gpt to german, i asked chat gpt to translate my writing to suitable form with good manners, i really dont know how can i write more objectively as i only state the facts and say that this has caused me lot of problems running my errands, maybe you could say better than google translate whats its all about? or maybe you could point me to another popular german ebike forum, iv tried to find more but it is very slow because of the translation even navigate forward in the site, i literally have to google every word on action buttons on forums and some sites seems to be almost dead.

Write in english on pedalec.de, it would be polite to apologise for your language ignorance or at least acknowledge it, but most Germans who contribute online are way more competent with english than we english speakers are with German for the most part at least.

 

[fill]

i want to know how is my post ranting? in my opinion i posted facts what have happened as symptoms of the malfunctions battery, what kind of service i got from the supplier, i´v got several helpfull messages and i´v thank people who have helped me, i´m not going to thank people who claims against every data given from suplier other people in several ebike and ev forums who also stated that 50v end charge voltage is not normal for this battery also iv checked the math by A.I also. and im not here for sympathy, im here to warn people of their customer service and your writing tone as "nobody" "honestly"gives me impression that you are biased, how you can speak behalv everybody in the forum? and how i act irrational?? dont you think suplier should replace their products if they come to me as not working as advertized and its been four months from this. if you refer of the voltage measured after charging then even the supplier dont agree with you, because its the reason why they took it for repair in first place, what wouldnt happen if would be normal to have 50.3 volts, and they told me this too, i guess you know better than people who make their battery.. maybe you have reading disability or something but my post have many times stated that in current state of battery is dead, i cannot get any reading from it from multimeter, nor the bms indicator seem to work and when hooked to ebike the ebike wont turn on, today i got answer that they are witing for response from their techician as eight days later when i again contacted them, if you have read european consumer laws you would know that their response time, repairing faulty battery instead handling that their own time and giving me replacement is against law, your being unnecessary rude, giving false info and it pretty much feels like trolling.

give example of ranting from my post and give me example how should edit my txt because your writing are unhelpfull, your writing does not have any facts, any data any constructive critisim and it dont contribute to the post or the topic anyway, if you dont have anything else to say than personal attacks, stay out from other peoples post´s

AI output is banned in here so it may simply be banned from pedalec.de and your translation probably has a lot of tell tale give-aways picked up by a batch filter or bot or ai agent.. How did the English non ai translation from the AI german read?

 

[tomtom81]

AI output is banned in here so it may simply be banned from pedalec.de and your translation probably has a lot of tell tale give-aways picked up by a batch filter or bot or ai agent.. How did the English non ai translation from the AI german read?

why is AI output banned here? i write the text and asked AI to fill any grammar errors and make it on form its easy to read. or are you talking about the calculations of the battery pack?

 

[d8veh]

i want to know how is my post ranting? in my opinion i posted facts what have happened as symptoms of the malfunctions battery, what kind of service i got from the supplier, reasons why i think it was malfunctioning and end result of trying to get new one from warranty, there is not much in the post else then saying im frustrated, thats hardly "ranting" and not thankin people is not true, i´v got several helpfull messages and i´v thank people who have helped me, i´m not going to thank people who claims against every data given from suplier other people in several ebike and ev forums who also stated that 50v end charge voltage is not normal for this battery also iv checked the math by A.I also. and im not here for sympathy, im here to warn people of their customer service and your writing tone as "nobody" "honestly"gives me impression that you are biased, how you can speak behalv everybody in the forum? and how i act irrational?? dont you think suplier should replace their products if they come to me as not working as advertized and its been four months from this, dont you think i should warn other people of their email ignorong and slow customer support?

if you refer of the voltage measured after charging then even the supplier dont agree with you, because its the reason why they took it for repair in first place, what wouldnt happen if would be normal to have 50.3 volts, and they told me this too, i guess you know better than people who make their battery.. maybe you have reading disability or something but my post have many times stated that in current state of battery is dead, i cannot get any reading from it from multimeter, nor the bms indicator seem to work and when hooked to ebike the ebike wont turn on, i cannot open the battery and remove the heat shrink around it because it will avoid the warranty, and not going to measure voltage from charging side as it has risk of damage the battery, all i can do is measure it from output side and as i told before i did not get any reading, today i got answer that they are waiting for response from their techician as eight days later when i again contacted them, if you have read european consumer laws you would know that their response time, repairing faulty battery instead handling that their own time and giving me replacement is against law, customer laws state that i should get refund or same kind of product with out delays, dont you think breaking consumer laws not worth notifying other people? should i just take loss of 420€ and start fiddling with battery what is under warranty? and loose my consumer rights? your being unnecessary rude, giving false info and it pretty much feels like trolling.

give example of ranting from my post and give me example how should edit my text because your writing are unhelpfull, your writing does not have any facts, any data any constructive critisim and it dont contribute to the post or the topic anyway, if you dont have anything else to say than personal attacks, stay out from other peoples post´s

Here's the definition of rant. To me, it seems to fit pretty well with what you wrote. What do you think?

rant
/rant/

verb

1. speak or shout at length in an angry, impassioned way.
   "she was still ranting on about the unfairness of it all"

Google Search

 

[tomtom81]

Write in english on pedalec.de, it would be polite to apologise for your language ignorance or at least acknowledge it, but most Germans who contribute online are way more competent with english than we english speakers are with German for the most part at least.

i think they took my message as ranting, but im trying to figure out why, i understand it might hurt enerdan.de someway posting messages what can make them seen as negative way, but as i read it over and over again, i never said they are scammers or trying to rob me or that intentionally send me broken product or anything like this, in my opinion i have just stated exactly what have happened, i´v ask people who claim im ranting to point the exact words what makes my post ranting instead of listing facts, i would like some so i could edit the txt in the form that i could post it to the pedelec.de but i dont know what to edit.

 

[tomtom81]

Google Search

yes im not angry or shouting or speaking impassioned way, so im not ranting. i am frustrated and giving all the facts revolving the battery and the customer support. warning other people for this is not ranting.

 

[tomtom81]

Here's the definition of rant. To me, it seems to fit pretty well with what you wrote. What do you think?

rant
/rant/

verb

1. speak or shout at length in an angry, impassioned way.
   "she was still ranting on about the unfairness of it all"

Google Search

i think ranting dont have anything to do with my original post, i allready told this. copy paste section what you think is ranting and if it includes facts what have happened, maybe you can tell me how i could edit to be not ranting anymore but still giving all the same information, like example how you would rephrase it instead.

 

[d8veh]

yes im not angry or shouting or speaking impassioned way, so im not ranting. i am frustrated and giving all the facts revolving the battery and the customer support. warning other people for this is not ranting.

That's strange because that's not the way I see it, and neither is it the way the German forum sees it. Still, you haven't taken onboard any of the help or advice you've been given, both regarding how to get your battery fixed and how to persuade people to help you. You're just going in deeper. I'm trying to help you, but it's very difficult when you don't co-operate.

 

[tomtom81]

That's strange because that's not the way I see it, and neither is it the way the German forum sees it. Still, you haven't taken onboard any of the help or advice you've been given, both regarding how to get your battery fixed and how to persuade people to help you. You're just going in deeper. I'm trying to help you, but it's very difficult when you don't co-operate.

i all ready told you and others, i cannot open the battery pack or measure voltages from charging side because it will avoid the warranty, i have theory of why german forum and you see it as ranting, i´v posted this warning for several sites with out same kind of problems, some even have thanked for the warning. and this post is not how to "fix" my battery, theres nothing i can do with out breaking the warranty to the battery, because the rules of the company says that any kind of opening and fiddling with the battery avoids the warranty, all i can do is measure it from output side, plug on to ebike or charger.

 

[Sturmey]

Discharge Voltage:

• The final discharge voltage is 30V (when the voltage per cell reaches around 2.0V), which is standard for LiFePO4 batteries, as discharging further could cause cell damage.

The above quote from Chat gdp is very misleading in your case. The Bafang Ultra by default is typically set for a minimum voltage of 41 Volts as shown below to protect the battery so you probably need at least about 43 or 44v in the battery to get it to even work for a short journey or the motor will probably cut out. ( You typically loose a few % because of this but it saves the battery)

 

[tomtom81]

The above quote from Chat gdp is very misleading in your case. The Bafang Ultra by default is typically set for a minimum voltage of 41 Volts as shown below to protect the battery so you probably need at least about 43 or 44v in the battery to get it to even work for a short journey or the motor will probably cut out. ( You typically loose a few % because of this but it saves the battery)



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well my range was about 30km before battery went for repair, i tested this about ten times, and the final voltage should be around 54.7 according the manufacturer and it was mostly at 50.3, 50.7, 50.8 volts, even then i got 30 km range, and according several range calculators for ebikes its close to what 960wh 48v 15s5p 30 bms lifepo4 should give on my ebike what has m620, i constanly got range estimate of around 40km depending of the weight load and wind resistance and the amount of inclines and their steepness, infact the controller saying the battery is at 73% charge as freshly charged and when adding 7- 10 km to the range it would be exactly what the range calculators would estimate. i am aware that lifepo4 cells have charestics to drop their charge status even nothing is drawing energy, aka resting voltage, i am aware that the m620 controller is set for nmc li-ion batterys and will cut the power at 41 volts, when i reached enerdan.de about the 50.3 freshly charged voltage i was asking is that normal because the controller show only 73% charge, and they said its not and asked me to send to them for analysis and repairs, i didint say to them that they send me broken battery and fix it.

 

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why is AI output banned here? i write the text and asked AI to fill any grammar errors and make it on form its easy to read. or are you talking about the calculations of the battery pack?

There is a Thread dedicated to the ban.

 

[tomtom81]

There is a Thread dedicated to the ban.

yeah, now i understand its about spamming and creating messages and threads, i dont think this applyes for using chat gpt as help forming the message and then posting by real person. no AI were used in this site it was done outside this site and then just copy pasting text like i did on the pedelecs.de forum, they have no idea was the text spell checked by AI in different web site or not, words are my own but spelling mistakes and chaptering was done by chat gpt, except the battery calculations what was only posted in this website, they were done by AI but in different web site than here and result were just copy pasted, as another words i did not bring AI with me