₦airaland Forum

ameh99:
DOD simply means depth of discharge


While lifepo4 has around 85 to 100%
Lead acid has just around 50% or even less

Meaning you can drain up 90 to 100% of your lifepo4 batteries without harming them

But but can't drain above 50% in lead acid

Here is a perfect example;


Let's say you have a 100ah lead acid battery which are usually with 50% DOD

Meaning the actual capacity utilize is just
50ah

And if it is lifepo4 with about 90% DOD
Then a 100ah lifepo4 can give you 90ah capacity safely

Sorry I'm still a bit confused here, are the batteries not brand new? Like I said in my previous statement I know what DOD means. What I'm confused is the 91.3% DOD you added in the specs, are these batteries fairly used? I'm just a lil confused on that. Still is.

ceaser:
Please house.

System is 12volt inverter and battery. Charged by 2 pcs SCC units 60amps MPPT (same product) connected in parallel. One is fully maxed out at 6 pcs 150 watts panel connected in 2s3p. The second SCC receives input from a 2 pcs 150 watts panel in 2s config, planned to be maxed out like the counterpart at a later date. Batteries are 2 units 12v 120ah LFP connected in parallel.

On a good day, as much as 50 amps comes from the fully maxed SCC and 18 amps from the second SCC.

Wires leading from SCC common terminals to the battery is 10mm copper, about one yard each.

What I am not comfortable with is that the 10mm wire gets slightly warm when max current (as written above) is flowing from the SCC. And with the plan to still max out the output in the second SCC, to bring the total amp going into the batteries to around 110amps, I am a little bit worried that the wire may get unsafely hotter.

Should I be comfortable with the 10mm handling that anticipated amp or would you suggest something else?

Thanks.

That's why we love lithium, see high amperage dey flow like water. You can upgrade to 16mm² cable to prevent the cable insulation from thermal derating.

Tnycee:
Has anyone ever experience this fault on Fangpusun flexmax 80/150.

The unit goes into sleeping mode and doesn't wake up even after a reset.

Unit is about 4months old, connected to 8unit 300w Canadian solar panels (2×4 configuration)

My friend had this issue, this @ efuro's advice helped him fix the issue

Pasword is set at 141

Go to Advance menu of your flexmax
MPPT Mode to U-pick from Auto Track (if you are using inverter with nepa change nonGT to GT
From experience set Park MPPT to 77%
Mpp Range Limit as 1/2 (half from FULL) and VOC to 99%

That is all, this should resolve your snoozing problem.

ameh99:
Makes are

Eve Billion and CATL respectively

They are one amongst the best lithium iron phosphate battery Maker's in the world

The 105ah comes with a barcode that holds every necessary info

Here are the parameters of cells

105ah, 3.2v nominal per cell

3.6v fully charged

91.3% DOD (depth of discharge)

1C charge current and 3C discharge current

And Above 3,000 cycle charge/discharge

Wow, thanks for the detailed reply. I'm loving the specs. I'm a little confused on the DOD you put there. What does it mean? I know what DOD means, I don't just understand what the 91.3% DOD means here, or is it the DOD where you get the 3000 cycles?

Ok

ojeysky:
I don't think the behaviour should be different even if charged with utility. When a battery is full, such as my Lifepo4 the charge current drops to zero

I wanted to add "if inverter is on load" before the first sentence.

NiyiOmoIyunade:
I am not aware of this phenomenon you have described where current fluctuates between zero and a value o. I guess it depends on the engineering specs of the charger you are using.

The chargers I have access to all output a steady current - even the solar chargers increase/reduce current smoothly and tend to hold steady regardless of the stage of battery charging.

It happens only on solar. Goes to zero or near zero on most inverters and maintains that.

NiyiOmoIyunade:
While on solar, the current passing through the cables may not be zero especially if there are house loads running. Even without loads, whether running Mains passthrough or on solar, a good charger will still put out some very low amps (trickle charge) while the battery is full and in float - this kind of charge helps offset the internal self discharge of the battery.

A sure way to know if your battery is full is coulomb counting such as you do with a battery monitor like Victron or Fangpusun or Bogart - you basically measure the net amps in and/or out and then declare the battery full when sufficient amps have gone into the battery to replace what was used (various parameters need to be met to satisfy the battery full criteria)

A quick and dirty way is to use the battery voltage while charging as an indicator of state of charge - if your battery hits absorb and stays there for a preset time, you can declare the battery full for all practical purposes especially if you see the current drop sharply to a level called 'tail current'.

JaySterling:
How will I know that my battery is fully charged by the Solar panels

True, but they'll moments of zero and then some current, equivalent to the load on the inverter, and zero again. It'll alternate, that just means the battery is full.

ai499226:
Yes. Seconded.

Cool

Interesting, what is the make of this lifepo4? Can one see the spec sheet detailing maximum charge and discharge rate, number of cycles, etc?

mmars:
Guys xup, my 60 days buyer protection is almost over but as a result of this po lock down i am.not sure if i will get it. When the 60day buyer protection is over and post office is still on lock down should i open dispute? if not what else can i do?

You still have 15 days buyer protection on your side at end of 60-day protection. You can use that, or ask seller to extend purchase protection which I'm sure seller will gladly do.

JaySterling:
Hey guys, I’m new to this

How will I know when my inverter battery is full?

I charge with solar panels and Nepa too.

A sure way to know is to either to buy a clamp meter and measure the current flowing into the battery, if the current is zero on the meter, when there is NEPA or solar, the battery is full.

www.nairaland.com/attachments/11278778_images7_jpeg_jpegc250b88d3a108a1e74e6c9bf7bb78252

Or if your inverter has an LCD or LED display that shows the state of charge when the battery is full.

https://www.luminous.com.ng/wp-content/uploads/2018/11/Capture-d%E2%80%99e%CC%81cran-2018-11-07-a%CC%80-12.17.13-2.png

Trippledots:
Pls observe covid related safety precautions oh... Use ppe with these foreign items. Bless you sir

He's more at risk from his fellow man than foreign items that had stayed days in transit with coronavirus, if any, long dead.

ojeysky:
I don't think 4x12v 60A will be 240, it will be 120A 24v

Cool. Image was pulled off internet, interested in showing him how to connect in parallel. Didn't even bother to see if the math in image is correct as it is irrelevant to what I'm trying to show him.

JaySterling:
my inverter is a 24V 2.3kva microtek inverter

Recently installed this week with 2 batteries 12V each

But I wanna add 2 more batteries for more backup time.

Can four batteries work on it, because each battery is 12V and times four is 48V

Yes, connect in parallel

dapsyra:
Where can I get the 24v version you mentioned?

Check Alaba or jiji https://jiji. ng/yaba/computer-accessories/69a-ericsson-battery-charger-mlvYDmaD1PjVnAlRxvhDehFb.html?lid=IkPODg0j84qSe2sI&cur_pos=1&pos=1&ads_count=8&ads_per_page=8&page=1

Ihategirls:
Please what’s the meaning of the FTA on the title of the thread ?

Free To Air, I guess the thread started as a means to get power to enable DIY enthusiasts watch their FTA satellite TV. But these days it's more about DIYing renewable energy than the FTA.

Deluxe8000:
Are you saying it can't charge my battery full? What can the charger do? Oh! And i have paid 25k for it.

Yeah, I forgot to mention that. The 24v version I've seen in operation can only do maximum of 26.8v or 13.4v, most lead acid needs something capable of pushing up to 14.4v, I guess that is the major drawback of it. But you can always check to see if yours can charge up to 14.4v, who knows whether they may just have tweaked it so.

Deluxe8000:
Thanks for the response. Pls does it overcharge and how will i know if it has fully charged my battery. Thanks.

It's a smart rectifier, will stop charging when battery is full.

tziz:
It's a Smartwatch.

Thanks, seller is smart

tziz:
OK boss. Yh their shipping is usually fast. I bought the same item in January, it took exactly 3weeks frm date of placing order to reach my hands.
Sorry u got delays.

Seller really do try, if it's not much of a bother, what exactly is this? Phone or accessories?

Deluxe8000:
Pls house what is your take on this charger? Is it better than famicare charger.

Better in terms of longetivity? I'll say yes, this is Huawei 48VDC 50A rectifier, commonly used by the telecom firms to supply power to antennas. This one is actually reconstructed to supply 12V instead of the default 48v. Yes, it is more rugged than the filmsy Famicare charger and I think it pushes more Amps than Famicare charger too.

tziz:
Please is Nipost still working?
An order I made on 28th of February has been showing me "Arrived at destination Country" since 18th of March. This is the tracking ID: RB923238138SG. Kindly help me confirm if I should proceed to the P.O.
I tried calling a contact at the P.O, after several calls, he picked and asked that I send him my details which I did and he never replied or picked his calls again..

It just arrived the country, give it time to get yo your local post office. That was some fast shipping, especially in this coronavirus era. I still have goods I bought in January in transit.

dermmy:
Despatched to Nigeria since January 8. You better go and open dispute your protection period would have expired by now.

https://global.cainiao.com/detail.htm?mailNoList=RB891013649SG&spm=a3708.7860688.0.d01

He may get lucky if the seller keeps extending the purchase protection time. But if the seller didn't, I'm afraid its way past dispute opening.

JaySterling:
What if it was 4 months ?

You can manage it if it's like below two months and same make. In six months, especially in Nigeria, the battery must've experienced so many cycles that it won't be fair to connect a brand new battery with difference resistance and number of cycles to it. I guess you just have to use the Zedix till it's dead, then get four fresh new batteries.

JaySterling:
6 months

Now it's even too late to mix it with same Zedix. Mixing it with another battery type will even make for a very shorter failure time.

Flets:
The Hydroxylchloroquine and Arithrymycine mix has been proven to work for Corona virus. Nigeria will not record lots of death because the doctors are already using these meds for treatment of the infected.

Unfortunately the west (US etc) will have to conclude their clinical trials before their doctors can prescribe these meds for treatment and lifes are lost in the process. Any doctor who prescribes these med without FDA approval in the US stands to loose his/ her license. This does not in anyway mean the med does not work.

https://techstartups.com/2020/03/25/doctor-vladimir-zelenko-treated-350-coronavirus-patients-100-success-using-hydroxychloroquine-sulfate/

https://www.forbes.com/sites/tarahaelle/2020/03/25/chloroquine-use-for-covid-19-shows-no-benefit-in-first-small-but-limited-controlled-trial/#56ccd8754c86

A trial so far found no success.

JaySterling:
Hi guys,

I currently have a setup with 2 200AH 12V each Zedix battery

I wanna add extra 2 200AH 12 v each Quanta batteries for more lasting and longer backup

Can it fly ?

How old is the Zedix?

ceaser:
That's a mobile phone power bank for 5v output in that link and the batteries are in 1s configuration.

The power bank I speak about is majorly for laptop but can also be used for several other devices. It has output for voltages that range thru 5v, 9v, 12v, 15v, 18v, 20v with a switch to select your required voltage. The cells are in 3s configuration.

Oh, that's cool. That one is more versatile.

BetaTechnicians:
That's 5v, he needs 12v.

Oh, I see.

spartacus11:
Can one use this CC for lithium batteries

Yes, you can set the maximum charge voltage you want. It's a lil awesome CC.

zeanslim:
I use 18650 cells holder, they create space to prevent shorts and reduce heat. Which is more better I have like 1000 of them gotten from AE.

And I just even use my battery pack to start a car and generator today. Directly.

Cell holder makes the job of creating a big bank with 18650 very easy, safe and with pleasing aesthetics.