₦airaland Forum

earthrealm:
Thanks, however i am not in lagos. Wish you included model numbers, so one can compare prices as i believe prices of LG products should be same across the major LG showrooms nationwide,..

After my last fiasco with a normal LG freezer, i decided not to go near LG freezer again,
Only Lg and Samsung appear to hv inverter fridge to the best of my knowledge. No real life reviews from samsung users, so am forced to consider Lg again

I use a Samsung Inverter Fridge. It is rated 140W but it can drop to around 90w after running for some time. Got it around 5 years ago. Still running.

jmaine:
Thanks to the combined efforts of Simydan (Procurement) and Oshomo12 (Installation), I was able to have my modest setup of:
1050W Canadian Poly panels (3 X 350W) in series at 48K each from @okaniudemba
48V 1.5KW Hybrid inverter with an inbuilt MPPT charger of 60A from Alibaba. ( Low Frequency)
48V 50AH LifePO4 battery with a 7-year warranty from Alibaba.

Pic 1: is showing the neat setup by Oshomo, he pays attention to details, and if he tells you he will be in your place by 5 am, be damn sure he will be there a few mins to that. ...

Pic 2: I did like to also give an empirical power consumption review of the FUSHIAI energy-saving fan I purchased from Simydan(Pic 2 attached). It's a decent 30W rated fan with 3 modes namely: Eco mode, natural wind, and Sleep mode, it can be powered via a US device and it's non-rechargeable.

Pic 3: Shows the power consumption of the device when in rotation and when still.

Disclaimer: I am not DIY savvy , but i have been an avid follower of this thread since the early days of George et al., long before the nairaland Tsunami of 2013...

The fan sure looks like a clone or should I say a lookalike of Xiaomi Smartmi standing 2S fan. How much did you procure it? I like the pricing of the Canadian solar too. If you don't mind can you share contact of PV seller?

NiyiOmoIyunade:
Very well explained in simple language!

Thanks a lot.

Trippledots:
Using an offline, third party shipper may reduce your price significantly.

Their shipping is about $60 but I have a shipper that may be able to land it for not more than $20-$30 .

We are always in need of cheap, and reliable third party shipping agent

Can you share the details of this awesome agent?

bbally:
in the case of rented apartment that we can not dig to install a earthing. what can we do please?

I doubt any reasonable landlord will be against anyone putting up earth especially if the house lacks one. Even if the place is cemented, all you need do is dig and cement it back. It's usually unobstructive as everything is down in the earth. If done professionally, landlord may not even notice, except for that "mystery" yellow wire or flat copper bar that goes in the ground

Easylearner:
I'm not too sure... with good Earthing, is there any need for spd? and if there's need for spd... where will be the best place to install it - I'm thinking the spd will be for just the panel and charge controller.

Yes, there's need for SPD with good earth. The two work together. SPD is voltage sensitive. Its resistance reduced sharply as voltage increase. You can imagine SPD as a gate and surge as flood. Under normal situation, the gate is shut but when seeing surge voltage coming, the gate quickly open so the surge can be diverted away from the equipment to the ground. It will automatically reset to high impedance status after the surge ends.

Ordinarily the resistance of the four major components (spark gap, Metal Oxide Varistor- MOV, Gas Discharge Tube- GDT and Transient Surge Suppressor-TVS) are so high under normal voltage but this resistance drops to zero or near zero to allow the surge current flow to the ground.


This YouTube video animation from ABB shows you the end of life behaviour of an MOV SPD behaviour in an AC circuit. The visuals depicts that the surge current flow path is through the earth (follow the flowing yellow line)

https://www.youtube.com/watch?v=tfXoOfipO08

Remember we have SPD for DC and AC. All are there to protect the equipment from surge current.

Easylearner:
My inverter just got toast(burnt)from thunder... no surge protector.

I'm planning to fix the inverter and install surge protector...

What is the best way to install surge protector :

Between the Charge Controller and panel
Between the inverter Ac output and house load
Between the inverter Ac input (to charge the battery) and Nepa...

Please I would need your advice.

#Oga Niyi
# Oga Casar
# Oga mctfopt
# The other Ogas

I see I'm mentioned here, do you have a good earth, and thunder arrestor installed in the location?

Valto:
good morning house.. abeg does anyone know about this sorotec hybrid inverter. its has touchscreen display.

http://www.sorotecups.com/product-detail/on-grid-off-grid-hybrid-inverter/

I can't really talk of this their hybrid, but I can talk of Sorotec as a brand. Their inverters I've seen so far are ok and pretty decent. Though not premium, but quality is ok.

lainwords098:
thats a lot of ginger i must confess

chibu4u2:
That's a whole lot of orders..........u get mind oh. Ordered this much and you're yet to receive any.

You gotta do what you gonna do.

I just want to ginger my fellow AE peeps. There is still light at the end of that tunnel and I guarantee it ain't a train travelling at 540km/h

Below are a list of items with date ordered from aliexpress that I am yet to get:

Item 1

---

Order Date: 14 April 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Order Completed
Buyer Protection Days Remaining: 6

Item 2

---

Order Date: 2nd May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Order Completed
Buyer Protection Days Remaining: 27

Item 3

---

Order Date: 4th May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Order Completed
Buyer Protection Days Remaining: 26

Item 4

---

Order Date: 12th May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 34

Item 5

---

Order Date: 13th May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 34

Item 6

---

Order Date: 16th May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 42

Item 7

---

Order Date: 30th May 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 54

Item 8

---

Order Date: 28th June 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 82

and finally

Item 9

---

Order Date: 28th June 2020
Shipped by AE through AE standard shipping
Aliexpress Tracking Status: Departed Country of Origin
Buyer Protection Days Remaining: 81

I am still hopeful that I will get 'em all

tonididdy:
Thanks bro.
This "unsuccessful delivery" will appear on track24 ?

Yes

tonididdy:
Good morning pros.
I am newbie shopper.
Please how do nipost make contacts... Via calls or text or both?
What if I missed their calls. Will I receive a text?

They use text and call. Sometimes they use one of them, or both. Always check your tracking number online, once you see "unsuccessful delivery" just know that your item is in your local post office.

akpunda86:
Pls guys i ordered for a large quantity of items going 100days i no see.This for an urgent job.if i buy in alaba i might spend close to 600k but client now on my neck.im regretting using ali express.

Guys how can i hasten it if i want a refund is it 100%.i wana source money and buy in alaba.
Thanks guys
My first time horrible

If it's up to 90 days and tracking still shows you are yet to get it, open dispute. You'll very likely win the dispute and get refunded. Refund takes up to 3 to 20 business days. Best way to ship things that are needed in a hurry is to use DHL, UPS or FedEx

dapsyra:
I was well within the Voc limit of the CC. It was the amps rating that I exceed.

I tried to use the Powmr CC to transfer energy from a 60V, 520AH Lithium battery to charge a 24V, 200AH Lithium battery expecting the CC to self limit the charging current to the rated 60A. It didn't. Due to the low internal resistance of both Lithium batteries, the charging current spiked beyond the ability of the CC and out comes the magic smoke. I didn't get to see how high the current went before the smoke but it was less than two minute after I started the process.

Mind you, I have always done same with Midnight Classic CCs.

Will love to see this experiment repeated, but with a Makeskyblue. Who can donate to this noble cause?

ceaser:
Oooshey! Tuale.

Lol. How is the PV doing? Good to see my fellow from the green side here

holyboss1:
This is quite informative.
Unfortunately the $60 does not include shipping.

How do you guys go about acquiring items that sell cheap, but has a high shipping fee?

The item in question costs less than $50 on Aliexpress but ships for $111 at the very least.

Does anyone know of any credible forwarder that can receive it cheaply and forward of at a reasonable price?

People that buy such usually do it in bulk and ship via sea. Getting a cheap and credible forwarder is just what makes the difference and that is where the real deal can be found. Unfortunately, I don't know of a great forwarder to recommend as it is almost like looking for a needle in a haystack. That does not mean it's impossible to find, it's just difficult. But if you look hard enough you may just see one.

holyboss1:
Hi guys, it's my first time with aliexpress.
I found a product there selling for $21 but ships for $111.

So I went on Alibaba and found the same item for $60 including shipping cost.

I am however skeptical about alibaba because I have never used it. Is the shipping/order processing similar to that of Alixpress?

Chat with the seller to actually verify that the $60 is inclusive of shipping to Nigeria, and that they can sell only ONE piece of the item. Many times the sellers are reluctant to sell just a piece even when they stated MOQ (minimum order quantity) of 1. I've bought one piece of item from Alibaba, but I had to chat with seller first and seller asked how many I was buying (seller actually has MOQ as 1) and it had to take some convincing to get seller to sell that 1 and also we negotiated shipping price before the deal was sealed. Alibaba sellers are a different specimen of sellers, most of shady ones will want you to take the conversation to WeChat or WhatsApp (you will have no evidence if deal goes south if you agree), always insist you have neither so all communication will be on the Alibaba portal, also only pay with Trade Assurance order so that you will have buyer's protection, the payment methods include:

1) Credit Card
2) TT
3) Online Bank Payment
4) Online Transfer
5) Western Union
6) Pay Later (for only US citizens suspended for now due to the world's economic downturn brought by Covid19)
7) Boleto

Note: If you pay via a method not on the list or directly
to supplier's personal account, the order will NOT be
protected by Alibaba.com Trade Assurance service.


Alibaba in my opinion is more flexible, I've gotten a seller to locally source for items not in their store and the seller was able to do that for me saving me extra cost in shipping that item from other stores as the seller consolidated the items. You just have to be patient to negotiate, get them to send you a PI (proforma invoice) take some time to source dollar (for big dollar payment you can always approach bank to dollars with the PI, bank can then wire to an account produced by Alibaba to effect the payment). I think it's fun to do all these

FYI: majority of sellers prefers shipping to a forwarder in China. The reason is simple, they get to get their money very fast. So get used to saying "I don't have a forwarder in China" when chatting with them about shipping and they ask, " Do you have a forwarder in China?"

We will...

We will...

By next year we will build better roads and healthcare.

We will end poverty by next year.


When will these politicians ever get to DO something?

When will the people said to be collecting all these humongous salaries be named?

Never, sounds like a good answer.

Anyone bought a good and durable work glove in AE? What is the name of the brand you got?

Damn, safety is not considered something to engage in in Nigeria. Most electrical technicians don't believe in using insulating tape on exposed naked wire. This freaking tape costs N100 each, yet exposed cables are left that way! Even some kazeen auto electricians uses polythene bags to tie around exposed naked wire! If the car suddenly goes up in flames the village people are said to be the cause! Safety is often played with because no one pays the cost in the event of an accident.


In 1992, 79-year-old Stella Liebeck spilled a cup of McDonald’s coffee on her lap and suffered third-degree burns on her legs and her groin area. The burns required extensive skin grafts and eight hospital stays and resulted in $18,000 worth of lost income and medical bills.

She sued McDonald’s for the $20,000 but the company came back with an insulting offer of just $800. Liebeck hired an attorney and ended up winning $160,000 in compensatory damages and $480,000 in punitive damages.


The owner of the building should be sued.

ceaser:
Firstly, the fact that the BMS LVD feature always sets in implies that the battery is experiencing some abuse from the user. For your pal, by the time the BMS LVD triggers, battery voltage is likely at 21.6v (2.7v per cell). It is better not to run in below 24v or at worst 23.8v (2.7v per cell). That way, he may be able to get a high cycle of use at that DoD. Note that even at that his 21.6v DoD, he may still be able to get some 6 years of use, but with 24v he nears some 10 years. Ditto increased years for DoD greater than 24v. Frequently deep discharging the LFP will make the cells to quickly get out of balance even though a BMS is present and the long term effect of that if not corrected is that some cells in the pack get stressed more than the others, them rapid degeneration.

BMS trips at 25v. Battery may be a little undersized for the project.

Secondly, there are LFP assemblers that give the option of installing a switch on the enclosure that you can press to do the reset. But if you choose that option, you risk losing the warranty on the pack because to that assembler, that means potential abuse which voids warranty.

A switch involves someone being physically present at location. A situation which is unfortunate as that can't happen.

Thirdly, your friend has another option of waking up the BMS - charging with generator. Solar input may not push in enough initial current to kick-start the BMS, but an external AC charger will surely do.

Strictly off-grid project. No gen in location nor any plans to put one in yet.

Finally, that battery should not be habitually discharged below 24v to get your max cycle of use outta it. He can get an external LVD device to control the battery output to the inverter or if he can afford, get an extra LFP type to share the work with the existing one (connected in parallel).

Thank you very much for your input. It is super appreciated.

futurenix:
Thank you plenty.

You are most welcome.

Who can help my friend solve this problem? He has an LFP with 24v 60A Daly BMS common port. The problem is that whenever the LVD is triggered, it does not automatically reset when charge flows from PV (say the next morning when the sun comes up) unless manually bypassed. By manual bypass I mean using a short cable to connect to the battery's negative and to the point where the BMS solar charge controller negative and inverter terminal battery negative meets, in simple terms replacing the BMS with a short wire. Is there a way to make this automatic? For instance in a remote site, it is expected that the inverter comes up by itself (if it the batteries drain at night) the next morning when the sun comes up. But this behaviour will make such a scenario not play out.

ceaser:
@ bolded
Oh! Well experience na master.
Na theory level me I still dey.

Lol

The experience wasn't funny. I was jejely enjoying the current overflow, the next thing I started perceiving the smell of burning rubber! I quickly rushed to the setup and noticed the BMS has started to melt..had to quickly turn off one source of charge. Funny enough BMS is still good

futurenix:
Ok. Thank you but what if the SCC and inverter charger both can supply a max of 80A each totalling 160A ( not sure if that can happen at same time) and the battery is 100AH or 200AH

Depends on the spec of the battery. Some battery can take 1C charge. So if the 200AH is such battery then you don't have a problem. As for the 100AH, that 160A definitely doesn't look good. So in that case, you'll have to make do with either one of the source charging it...either PV or inverter. So that means during the day, you can always switch off the power input into the inverter and run on only solar. At night you can put it back on. Just remember to turn it off in the morning

ceaser:
He said the BMS will burn out if the battery is exposed to a higher than rating current.

I think in such instance, what the BMS does is to shut down (activate overcurrent protection) rather than burn out.

Or am I missing something?

The leads of a BMS are often rated according to the charging current capability. Eg if you have a 50A BMS and you push 120A through it, the lead wires will most likely melt or even the BMS enclosure itself! This is because the cooling factors may obviously not be in place for that high current capacity. I've experienced this.

ojeysky:
Yes but that should only the applied with small banks else one may use one kidney to buy BMS , if you have a over 400AH bank then you don't have to look for a 400AH BMS because the reality is that you won't generate or consume up to that amount of current instantaneously. So for 150AH and above a 100A BMS is fine. If you get higher at a good deal, all well and good

Well, I think I should have worded it this way choose a BMS based on both your battery and your inverter/PV's charging current capability

futurenix:
Please house, just to be sure, is a BMS current rating supposed to be the same as that of CC or lesser or there is a particular recommended value.

Chose BMS based on the battery in use. Eg if you buy an 100AH LFP that can do a 1C charge ie 100A, you are better off getting a 100A BMS. This BMS can work with a 60A SCC. So if your PV supplies 60A and your inverter charger supplies 30A, the BMS can handle that. But if you buy a 50A BMS and your PV supplies 60A and charger 30A, the BMS will burn out leaving your battery charging/discharging and management unregulated.

Another instance if your battery can only take 50A, buying a 60A BMS is advised, so if the charging exceeds 60A, the BMS should be able to cut it off saving your battery from being overcharged.

ojtech8291:
I have 6 units of 275W panels, Rated voltage 30.9V, Rated current 8.91A, VOC 38.8V, SCC 9.47A and Max system voltage 1000V with two different CC 12/24/60A VMax is 70V, while the other is 24/48/40A Vmax 100V. Which of the controller is the best to handle 6 panels and at what configuration of the array, 2S3p or 3S2P?

ojeysky:
I will use the one rated 70v and do 2s3p

Just like the person above stated, I'll do the same. The thing is whichever CC you chose out of the two you are theoretically going to lose some power out of the six 275 solar panels.

LegendHero:
I think they might be benefiting from it too. Coz if it is not that they are under a spell, they should have found a way to solve the police menace all these years.

I'm very sure they all know the solution to all this, just that they don't have the political will to proceed with it.

That's very likely.

earthrealm:
ojeysky
Your Mpp inverter, does it charge with the inverter turned off?.

@ house, my 4yr old luminous FLA, have started need frequent watering, before it could go 4 to 8wks b4 needing water, now its about 2 to 4wks. And some cells need more water than others....sg readings are fairly same, apart from a few rougue cells. Ie out of the 6 cells in a battery, 1 or 2 may need 70cl of water.. another 2 cells 30cl, and the rest needing only 10cl.

My inverter charge setpoints are 14.5 for absorb and 13.8v for float, same for the CC that i introduced 4 wks ago.

Lil research on the web , say as fla batts age, they need more watering, but mine appears to be on the extreme.
Am thinking of reducing the absorb & float voltage to 14.1v and 13.6v respectively.

I know am 1 of the few sturbborn peeps still using FLA in this time of Lipo4 batts and all, but if you got any tips from your fla days, kindly help me.

LFP users are like less than 5% of total users out there in the real world

Have you checked for cracks or a leak on the case of the battery that needs more topping?

LegendHero:
This is my own solution:

Introduction:
The SARS brutality is getting out of hand and it seems the government is getting clueless by the day in finding a lasting solution to the constant killings by these blood sucking demons called SARS.

Nigeria is a nation where conventional solutions always seems ineffective because of the corrupt nature of almost all agencies of government. No matter what the leadership does, these agencies will always find a way to maneuver their way and commit atrocities. Hence we need to solve this problem using a more rugged approach.

Scenario:
- Police DPOs are always informed anytime their officers are going for a raid. (Probably 75% of the time).
- Infact internal sources claimed that the DPOs sometimes set daily/weekly target for officers to meet.
- The officers get back to the station and remit a certain percentage of their loot to the DPOs daily/weekly.
- The DPOs in-turn remit a certain percentage to the commissioners & other leads on top of the hierarchy.
- Possibly, the leadership in Abuja might be part of this looting network too (assumption).

Judging from the above scenario, it will be absurd for the government to think the police head will be able to solve this police brutality on their own coz they are all guilty from top to bottom.

Proposed Solution:
- A Rep should sponsor a bill to establish a separate disciplinarian (trial) court with sole responsibility of trying cases of extortion & police brutality in the police force. (The body constitution may include the police, judiciary, etc).
- The president should assent to the bill and make it a law.
- Make a law that ALL the officers that partakes in a raid of extortion be sacked within 4 weeks (Investigation period)
- Most local police raiding guys are familiar faces. Their offices are known by people in the locality.
- The FSARS guys too can be identified with at least something. (An assumption)
- Since the DPOs most times know about their officers going out for raids, make a law that any DPO whose officer engages in a raid of extortion be either relocated to another state or he should be demoted to a regular officer. (Give them grace of three occurrences and issue warning at every instance).

Conclusion:
In my own theory, it is better to go after the top guys when trying to solve a menace coz when you shake the top, the lower cadre will fall in line. If the DPOs are held responsible for the actions of their officers, they will make sure their officers are kept in check.

This is just me thinking out loud!

This position makes so much sense. But alas who will that politician to push it to the Senate? The ogas at the top are busy scheming to win 2023 election to care for such.