Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Chargery bms bad reviews?
#11
(04-19-2020, 09:41 PM)jonyjoe505 Wrote: Hope they're not getting overcharged?

In winter I have the controller bulk setting set to 15.5 volts(max it will go) and usually struggle to get to 3.65 volts. The few times it does get to 3.65 volts the chargery will disconnect the panel.

If I set the bulk setting to 14.6 volts as recommended for a 4s lifepo4, the controller will only charge at 1 amp, at 15.5 volts I get the full 12 amps the 240 watt panel can put out. I demand max performance. Because of the extreme performance,  I have the overvoltage protection relay, in case bms fails.

As far as charging or not charging in cold weather, you can buy temperature control relays on ebay (cost about 5 dollars), they are fully programmable in turning on/off a relay at certain temperatures. They have small 10 amp relays, but those small relays can power bigger relays. You can see on youtube how to use those relays. Some that I bought only display in celcius.

OK, as long as you're OK with the shorter cell life effects caused by going to 3.65V?
You still get almost all the capacity going to 3.45V/cell & holding there for an hour or so - "holding there" lets the cells "absorb" similar to LAs.
I find going above about 3.45V/cell makes my LiFePo4 packs unstable & balance starts going out fast.
Running off solar, DIY & electronics fan :-)
Reply
#12
I'm using this BMS for about 4 months. As of today have positive experience with it.
If you have any question, feel free to ask.
Also have youtube channel with BMS review, if anyone interested could share link (not sure if it's allowed to post youtube links here).
Reply
#13
Why do you set the voltage higher? The limit that occours is since the controller goes into CV mode instead of CC
Its normal and its to protect the battery. The max voltage in the Charge controller should be the max the battery have in the Specs and not above.
NOTE! My links supplied in this message may be affiliated with Ebay and by clicking on them you agree on the terms.
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 100kWh LiFePo4 | 20kWh 14s 18650 |  66*260W Poly | ABB S3 and S5 Trip breakers
Upcoming: 14S 18650~30kWh
Reply
#14
I posted this on another thread...   I would not recommend Chargery.    
I deployed the 1st 16T successfully on a 14s13p  APC battery pack..  so i got a 2nd one.
I got a 16 - and discovered that this model does not include balance.
I got 2 more 16Ts...   and deployed the 1st on on a 14s7p APC battery and in 2 weeks it burned a resistor/failed...   No abuse or signficant load or significant difference in cells (<20mv balance diff).    Here's a pic of what I found when I opened it - notice the burn smudge, the resistor was so burned it was 'flakey' to the touch. 
 

What really upsets me is that it did not fail 'properly'...  it went into wildly misreading cell voltages AND started a cycle of 2 minute relay OFF...  and then reset? -> rely ON and repeat - causing the battery to be enabled and disabled in a cycle.   Leaves my confidence shaken.   If a BMS fails - the least it can do is to turn things off and leave them off.  

Next - I deployed the 3rd chargery 16T to replace the 'burned one' above - but accidentally touched the end of the temp sensor to a cell (pushing it into the battery) and it sparked/blew it up the control unit - completely non-functional.   The probe appeared to be shrink-wraped / electrically protected but I guess not.   While I'm willing to say 'my bad'...  in the sense of  'fool me once shame on me' but I'm not going to spend more money for fool me twice.   Out $300 within a couple of minutes.  

I still have the original 16T running - for couple of months now - and appears OK, but after the on/off failure above I've lost confidence in this product.
aleks2a likes this post
Reply
#15
^^^ Here is a link to the recent prior thread, which includes further reports of Chargery problems.

Beware that in some cases a low-quality bms is worse than no bms at all (that's a general remark, I don't know if that applies to those at hand).
Reply
#16
I suspect some of the problems with the chargery might be overheating. There is no fan on the unit and it is capable of 1.2 amp balancing, the heat will cook the unit. I disable the balancing on my chargery and just rely on my active balancers. And when i first got the chargery I notice if you use the internal power (from the balancing wires) i was getting all kind of strange cell readings, when I use external power, everything works good, all cell voltages read normal. I also miswired the shunt but luckily it didnt damage any components.



After a year and half in use 24/7 its been running excellent. I still recommend the chargery bms8, which is what I use. But I wouldn't recommend using the balancing function because there isn't any vent holes in the unit. Every balance charger I seen has a fan or vents to dissipate heat.


"Why do you set the voltage higher?"


because of voltage drop from controller to battery. At 15.5 volts on the controller LCD display the battery terminal reads 14.6 volts. It gives me more amps from my 240 watt panel. And I definitely couldn't do it without the chargery and my active balancers. I also have an overvoltage protection relay which will disconnect the panel if the battery voltage goes above 14.7 volts. I don't trust any bms, even the chargery to be 100 percent everytime. Always have a backup in case something fails.



Why I set the bulk voltage to 15.5 volts, to charge at 15 amps from my 240 watt panel, at the recommended 14.6 volts I only charge at 5 or 6 amps.


Reply
#17
unfortunately another bad review:

https://www.youtube.com/watch?v=cxtfpI0CelA

it's mine BMS/video
Reply
#18
(10-13-2020, 02:14 AM)aleks2a Wrote: unfortunately another bad review:

https://www.youtube.com/watch?v=cxtfpI0CelA
Watched the video, person assumes that it is the BMS that is the problem so orders another which does the same thing....... Hmmmm.  Couldn't it be the battery or cabling?

He didn't check or do the obvious such as move the cells from one bank to another and see if it follows .... or disappears.
If it disappears then it was a cabling issue. If it follows then it's the cells.
If it doesn't follow then it really is the bms.

Doesn't this make sense or am I off in left field.
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)