₦airaland Forum

ewizard1:
Since I started using my Lithium ion around July 2019, it's been running without a BMS an I have nothing to worry about because I knew what I did there. Even though I later got a Daly BMS from AE, I still didn't bother installing it. Already getting set on my 48v setup.

essegis:
Freight forwarders oo. Leave all those thieving DHL and FedEx alone abeg.

ojeysky:
As to shipping from AliExpress without using the DHL et all, there are other ways, ping me in the backyard

ojeysky:
Okay thanks for clarifying, about 200AH 12v battery is not a bad deal, though if you go with the prismatic cells you can get a better deal of a very good battery on Ali. Currently starring at a 16 units of 3.2 150AH which will be 600AH 12v for 1.8k (+1k max for shipping)

essegis:
Funny thing, with everything I bought I haven't still much surpassed the budget if I was to go for Lead Acid batteries. So I think those guys saying its almost same price in the long run are correct. Although, when COVID-19 is over and I start acquiring all the additives like BMS and charger it will become higher than the Lead Acid budget.

onyxo76:
sarcasm bro...is the above even possible?

ojeysky:
Post offices in my state was on lock and key until this week that they are opening 3 times a week, having not yet received a call planning to check on them by next week.

essegis:
Even for top balancing I will still have to parallel them. Only difference will be a charge would be applied to them as against discharge when it's bottom balancing.

As for the cells they are rated at 66AH, 500WH. But these cells are not new and they being used initially in an electric car one does not know the condition they are coming with. Though seller sold at 65% capacity and a lot of folks have been getting that or higher.

I don't know what you mean by significant storage as they are not brand new. I ended up buying 57 modules though at an overall price of just above $2000 (a full pack containing 48 modules then 9 extra).....the shipping cost a arm and a leg sha oo. Planning to set them up in 14s for a 48v system and yes I won't have to go digging too much before I can get inverters that will work within the sweet spot voltages of this system. They are compatible with most inverters out there.

mctfopt:
Too late to wait. I'm enjoying LFP already and I doubt I'll ever go back to lead acid

I love watching 100A flow into em banks and get it floating before 2 hours. Even if it fails tomorrow, it's been nice rocking it.

bigrovar:
Which is true but still very very expensive, an expensive experiment which often time ends up in failure.. You know why? Lithium is very very complicated and has many component all of which have to work just right. Lithium has very little margin of error in setup.. You have to get the right cell from the right cell maker, you have to ensure the cells are well balanced, you have to get the right BMS, right charger sometimes the right inverter.. One mistake and poof all goes up in smoke.. and they often do more often than not you just don't hear that part in the songs

Many on here have dipped their hands in lithium and gotten burned badly and suffer their loses in silence.. You will hear them throwing specs like 3000 cycles at 80% dod lol.. what u don't here is the case where the bank (if you are lucky) just stop working after like a year.. They just stop..

Lithium is the future no doubt.. Just waiting for the dust to settle.. maybe when reputable chinese solar maker like episolar start doing lithium then you can take a cue that it is time to give it a look. for now I will advise wait for the second iteration before you look that way

onyxo76:
very useless. infact if i become president ill do the following for doctors
1. no doctor below 50 years will marry ,they need to concentrate on the job.
2. they will not paid. they are on humanitarian service.
3. they must live within the hospital, no going out.
4 they must grow their own food, just like soldiers do in North Korea
5. they must work till they drop dead no room for retirement...

ojeysky:
Theoretically yes, assuming we don't consider losses @12A will require at least 120Ah for 10hrs which is 60% DoD, but in practice it really depends on efficiency of your inverter but you should get 6 to 10h

AshipaEk0:

https://www.youtube.com/watch?v=qMhdpWMDp04

mctfopt:
The premium mentioned in that statement is the Victron. Makeskyblue and PowMr are not premium, but they work. Makeskyblue has some little edge over PowMr in terms of software and setting flexibility.

mctfopt:
That is why I love premium product. The Makeskyblue will just go blank in the event that the battery is missing in action, and continue when battery comes back

pafra:
How durable is hisense televisions I think they are not as good as LG TV.

Please your expert advice.

ceaser:
No, I've not tried charging each cell differently. But the two LFP AC chargers I was supplied by the battery vendor all charge at CC-CV 14.5 volts. Even LFP chargers sold online at AE all put their 12v chargers at 14.4v charging voltage. Besides, I noticed that my battery manufacturer scribbled voltage range on each cell (2.75v to 3.7v) on some and more or less on others. I guess this was done during the selection process to avoid cell mis-match which may affect performance. I'll see if I can snap a good picture to put on here.

That being said, when I was learning to get the sweet spot to charge with the CC, the BMS trips of at 14.5v. So I adjusted the charging voltage to 14.2v max. I notice that on CCs that has lithium settings, the moment you select it, the charging voltage resets from the usual 3-stage gradation to a recommended 14.4v. There is also a special lithium PWM CC that I've had for about 4 years now. It has various settings for different lithium chemistries and configurations. On it, 14.4v is the spot for 3.6v cell. I'll snap that page on the manual and upload here.

Your suggested 3.45v per cell puts the charge voltage for four cells at 13.8v which is still within the charge voltages I mentioned earlier as sufficiently giving good backup (reference to my earlier post). I think I will do some controlled trials to determine if 13.8v gives as much sweet spot as the 14.2v I presently use.

Whenever the sun is favourable and the voltage indicator on the battery gets to 14.2v for at least 3 hrs before sundown, the battery works uncharged for the next 22 hrs at a LV disconnect (user customized) of 12.2v. But this rainy period that occasionally pits the highest attainable top up at 13.5v, if the sun does not come up by 8am the following day, the 12.2v low voltage cut off point is sure to be reached by around 10am. The battery (12v/200ah) solely powers a 120 watts deep freezer, so it works the inverter 24/7.

It's intended to secure more panels within the CC's allowable limit to mitigate the effect of poor insolation during this rainy period after lockdown is fully over.

ojeysky:
Just curious, have you tried to charge at 3.45 per cell instead of over 3.5v per cell? And did you notice more than 5-10% difference in capacity? Because I don't think charging LFP at high voltage is a good thing for the battery's health

idris4r83:
Gurus in the house pls can pwm charge controller effectively charge LiFePo4 batteries?

GRACEGLORY:
All the electronics terminology and acronyms can be confusing.

HD TV stands for “High Definition” TV. HD is any TV displaying a 720p or higher (1080, 4K, etc.) resolution image.

HDTV refers to the detail level of a screen; or to put it another way, the number of pixels that are packed into a display. A pixel is the smallest visible element on a display, the ‘dots’ that combine to make up the overall picture.

LED TV is a type of LCD television that uses light-emitting diodes (LEDs) to backlight the display instead of the cold cathode fluorescent lights (CCFLs) used in standard LCD televisions. LED TVs are more formally known as LED-backlight LCD television.

An LED LCD TV can be HD if it has a high resolution (as explained in the first sentence above).

mike234:
Got this skyrun android smart tv online brand new the issue is that the screen flickers at intervals. What could be the cause?

JUO:
you think so at the bolded? My fridge operates with 30w most times the max is 70w, fan is 5w on lowest speed which is just okay, bulbs is 3w*4, 5w*2. You do the calculation. My inverter is Fangpusun still available at 460k for 3.5kw/48v

spartacus11:
I will see if i can get it in the market the shipping fee self is very high too about 6k

Dam5reey:
Your inverter/Battery has fault, you can charge 200AH with even 500VA, I used it for more than 3 years, there was no charging issue.

Same manual recommend only 100-120ah

It's only mean it will take longer to charge.. that's all

It works like UPS na, how does load affect charging?

When you have grid only Charging will be activated, and when it's fully charged it should stop

spartacus11:
Please any idea about the consumption of dis

PHAYOL81:
Kudos to the Yoruba nairalanders and every indigene of south-west states in the country and beyond: your comments so far is an indication of greater days ahead. How everyone of us has come out with one voice to condemn atrocities this man committed without being emotional and sentimental with tribalistic tendencies is a big thumb up. WE NEED TO KEEP THIS UP.

Shakaranews2020:
Bro, what's the cost of an inverter that could possibly power my TV, radio, fan and bulbs? I'm in Abuja

saint2ace:
Hello boss, can I see a pics of Ur connection and did u use a BMS with it?

livewithpurpose:
Yes it was almost immediate drop to about 6 hours but it's now 4 hours.

ojeysky:
It's a good brand but I think this particular model does not do up to 1kw solar array.