₦airaland Forum

PotatoSalad:
The airpods max are not a bang for your buck.
Overpriced with gimmicks that'll make non tech savvy people empty their wallet.
WTF is high fidelity and computational audio?
How's that different from lossless audio??
They even made the ear cups a big deal.
If you have to charge 500 bucks for a pair of headphones, add a protective case in the box na, not that bra.

I own the Sony WH-1000XM4, Bose QC35 ii, beyerdynamic DT 770 Pro 250Ω, Audio Technica M50x and other headphones.

Hope to cop the Anker Soundcore life Q30 soon. Heard it's pretty good budget headphones.

Life of an audiophile lol.

You are truly an audiophile. I'm looking at the EDIFIER NB2 TWS with active noise canceling. Though I know earbuds noise canceling features cannot be compared to that of the headsets. Bose quiet comfort is on a class of its own. Wanted to buy the Sony WF-1000XM3 earbud (dunno why Sony likes all these complex naming pattern) but was turned off by the lack of waterproof and the bulky design.

Currently using Tronsmart Spunky Beat earbuds. Earbuds is nice, just lacks ANC and the touch control is as erratic as ever - it is downright out of control. But the sound production is pretty cool , bass is super cool with AptX and the cost is still under $40

Any idea why lead acid battery manufacturers don't usually state the number of cycles their battery can do on their specification sheet? Are they shy or just downright sneaky?

Teewhy2:
Good Day House,
I have some 150 watts (5 pcs) panels that I am using for my solar system and planning to add more, I will like to confirm if it is possible to add different panel watts say 250/300 watts panels to the present system considering am using Fangpusun 70 amps MPPT charger.

If you can closely match the open circuit voltage (VOC) of the 250/300w panel then you are good. Though you may lose some power due to mismatch, but your overall yield will be much better than running only the five 150watts.

So in practice, most VoC range of 150w is from 18v to 20v and that of 250w is from 36v to 40v. So if you connect two 150w in series and parallel it with the other two, you will have one left unconnected. You may need one more 150w to balance up the VoC then you can parallel with a 250w or 300w. The power loss then will be minimal. Still better than running only the five 150 watts

Or to avoid the headache, just buy more 150w or sell off the 150w and go full 300w or 250w.

Elitesplanet:
Hello Guys, i will love to make an enquiry, Ordering and Shipping a Laptop and a Phone worth 1300USD via Aliexpress does it warrant clearance from Nigerian Custom or will it be delivered to my nearest NIPOST Office without custom clearance?

Every goods undergo custom clearance. I guess your question is "will it have custom duty to be paid for it?" If that is the question, the answer is not sure but likely. The custom duty thing is a bit random, but the possibility that a good will get one increases with the perceived worth of the goods. Oh yeah, the custom guys are now not fooled by the declared value, they just randomly tag a duty to a good. You may get lucky and it will escape that, but if you are that worried about it, why not look for a trusted third party shipper (don't know of any) that you can use and let the shipper worry about that? Goodluck.

ovuobab:
Please guys has anyone used alibaba before

Yes I have done some transactions there. Hoping to get a package from there this weekend.

Emily22:
Use WISH

They have better and affordable rings

Most real life reviews of things bought in WISH that I have seen is generally negative. Most of their products are not original or just not well made. I think @ oladele239 is better off shopping at AliExpress.

@ oladele239, just log into AliExpress and browse through their plethora of jewelries and check out those with many reviews. Hint, check number of orders vs reviews left. Eg a product that sold 20,000 times and have only 6 five star reviews is certainly worth avoiding as the other reviews not seen must've been negative hence the reason the seller decided to cut it off. Goodluck.

Mikeshine:
How do someone gets so know which shipping company a seller shipped with?

In AliExpress, go to Account > Orders> Tracking, and you will see the carrier the seller used to ship your item.

ceaser:
I was impressed too.

By the way, I eventually made 6k5 out of the battery.

Fair enough...at all at all na im be winch.

ceaser:
But he knows that spent batteries can be sold and so he brought it back to me to sell and make some money saying that that is the least he could do in appreciation.

Great guy. I like his attitude.

ceaser:
Please how much is a spent 12v100ah lead acid battery sold for? I may have one to discard.

Depends on the weight...if up to 30kg you may get up to 10k

blackboy92:
Good day everyone, I’m about to buy somethings on taoboa through an agent on Superbuy can anyone tell the cost of shipping something of 6kg to Nigeria with aramex

It's China, no fixed price for ANYTHING. You just negotiate and negotiate till you get what you liked

But if Superbuy is doing it for you may want to check their freight calculator https://www.superbuy.com/en/page/query/freight/

generationz:
Hello, please is it okay to buy fairly used battery? (Not lifepo4)

Pros

1) It leaves less hole in your pocket- cost effective.
2) A good way to buy more for less or even use premium brands without breaking the bank.

Cons

1) You can't really tell whether you are getting a good deal or not as some batteries may have been vastly abused/extensively used, and most sellers will never divulge all information they know about the said battery.

2) It's used, one should not expect them to behave like brand new

My recommendation: Only buy if seller is willing to give you a sort of guarantee to test if the batteries are ok (ok in the sense of it being fairly used, one should manage expectations here). Because the major way to find out is by using it.

Or give you some months (say 6 months) guarantee that the batteries won't perform below par. Before you do this deal, you gotta trust the person selling it to stand by their word (kinda hard to get in Naija )

NICE if they didn't pay ransom!

GTB card monthly limit for naira denominated account is $200. Their rate as of yesterday was ₦394 per $

busuyi44:
N390/$ as at 22/11/2020 Zenith Bank MasterCard rate. Dt was d last time I used it. Could v changed now

Thanks a lot.

Emily22:
Gtb is 200

Awesome. Thank you.

Emily22:
Zenith is 100$

Ok. GTB same or $200?

busuyi44:
GTBANK MasterCard rate N394/$ as at 27/11/2020

Any idea on current Zenith rate? Both still limited to $200 per month on naira denominated account?

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

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.

ojtech8291:
Please can you explain more on this? The same thing is happening to one 24V setup now. Sometimes it will work fine but the following day inverter will just shut down with the sunset. Though I discovered that one of the battery down to 10V while the other is 12V. The cable from that connect the battery to the Inverter are not equal. The +Ve is longer that -Ve could that be the cause? if not what could be the cause of this?

The one that goes down to 10v is failing or already failed. Unfortunately, you may have to replace the batteries.

feflo:
Charge Controller

Been a while I've seen this rugged charge controller. Premium really serves.

feflo:
I have been quite busy in the last one month trying to set up our new office and workshop. We now have an office at Alisiba Bus stop, Sango, Ogun state.

Congratulations man! More wins. You really demystify solar and make it easier to obtain. Well done.

ojeysky:
Sure I normally experience this though now my panel is oversized so i don't notice anymore. In other to check if it's a failing battery, you could introduce load and see if the instantaneous yield will increase significantly if it doesn't then you are good with battery

Stop reading my mind. Just typed same before seeing this

shithapuns:
Ojeysky.

Thanks for the explanation, my question is, Are you guys/other people experiencing a similar reduction in harvest.

I also learnt a failing battery bank or a bad battery in the mix could cause poor harvest again.

Yeah, my production has reduced. But you can rule out failing battery by adding more loads to the inverter when it's sunny and watch the charge flowing in. Check whether the current increases (after the sunshine drops and picks up) and sharply tapers off (same may happen when battery is full or near full). But if battery is neither, then you may have a failed or failing battery.

shithapuns:
Is ot just me, or panel degradation setting in.
A 2kw panel array on 60amps cc. 24v inverter struggles to hit 6kw with all the intense sunlight this period.

Same setup easily hit 6.8kw previously.
Is anybody experiencing similar poor harvest?.
Max instantenous i observed was 1.3kw by noon.

What could be the cause?.
Installation about 4 yrs old chinese panels

The days are getting drier, the atmosphere is getting dustier which obstructs the sun's rays. Panel could be partially covered by the dust, of course.

Some of the key results reveal that optimum tilt angle changes between 0° and 42° throughout the year in Nigeria. The optimum value is found to be 0° during the raining seasons (i.e., April-August) in all locations. Findings also show that the optimum tilt angle increases in the range of 5° to 42° during the dry seasons (September-March) reaching its maximum value in the month of December in all the locations. The extractable power on optimum inclined surface increase in the range of 2.5%-9% compared to horizontal surface while the cost of electricity (COE) reduces by 6%-9% when solar panel is placed on optimally inclined surface.

JUO:
yet to confirm the balance current

Ok

JUO:
Anti BMS 200A 7-21s available

Does it have balance current in the range of 1A to 2A? If yes, how much?

ojeysky:
I know someone who has the attached for 50k/60k it's 100A/150A with 1A/1.5A balance

Should've stated the current. At least 200A. Thank you very much for posting this.

I'm in the market for a good smart 8s BMS for Lifepo4 batteries with active balancer of between 1A to 2A. Anyone got ideas on which brand to get? Links, screenshots, suggestions are all welcome.

ceaser:
Thanks so much for this.

@ bolded, I wouldn't be sure but that suspicion was why I made that statement of electric shock when I touched the battery terminal. I'm used to working with standalone systems (that power appliances directly rather than going thru the wiring of the house, so I touch the DC terminals of those without experiencing shock.

What would cause such back feed?

I don't have access to a clamp meter, just the usual multimeter. I'll try a continuity test using that.

In the event of confirmed short which may not be easily traceable, na for the guy to follow Ògá Niyi's prescription of an amp limiter.

But inverters have short circuit protection built into 'em. Isn't that supposed to offer some sort of protection to the device itself so that it does not go kaput due to shorts?



@ bolded. I don't really get that connection described.

Most backfeed is mostly from electrical connection, when the output is allowed to feed the input. Also it can be as a result of inverter failure.


The short circuit protection response time of various inverter differs, some may respond slower than others, and by then the damage is already done.

The connection I described is simply bypassing the inverter. Just connect both lives together, do same for both neutral and the earth respectively- effectively bypassing the inverter.

ceaser:
Hmmm. Okay, when I tried to fix the second inverter, I inadvertently touched the positive pole of the battery terminal while the inverter was working (had my feet on the bare floor) and I sensed an electric shock. Could that suggest a live-neutral short?

How does one get an electronic amp limiter?

In cases of confirmed short, is there a way that can be finally corrected that the continued use of the limiter will not be necessary?

If you can trace the short and remove it that will be fine. A generator can handle shorts better than an inverter. Run a continuity test between the three wires (L,N and E). You can check the wires to see if there are areas (especially around joints) that the live may be making contacts with either the neutral or earth. This can also be ascertained by putting the loads off, removing both the output and input wires of the inverter and connecting it together, place a clamp meter on the wire and power on. Check for any presence of high current. If you cannot find any, then there is no short on the line.

Also there is a possibility that there is a faulty electrical equipment that introduces short to the system. You can have them power everything they ever use (including chargers for different devices) to see if any of it is the rogue equipment.

I hope there is no backfeed from the output of the inverter to the input.

The shock you got may have something to do with you being bare feet. Reason it is advised to wear a thick rubber boot while working with electricity- you gotta increase your resistance to electric current flow.

AetA:
Thank you, I really appreciate your assistance, pleas can you recommend a sea shipping company to me? I tried sending you an email through Nairaland but it didn't go through. please how can I reach you?

I can't really recommend any good shipping company as the ones I've used all have one story to another. Very unpleasant experience, so I'm not going to recommend any of 'em. Wish I can help you more on this.