₦airaland Forum

earthrealm:
At higher volts..smaller current flows tru the cable...and vice versa....so sending at higher volts enables you use thinner wire..

Same principle why nepa transmits at high tension/voltage, we have 33,000volts, and higher for the national grid.this way immense amount of power is transmitted at negligible losses at extremely high voltages, which is now gradually stepped down at
or close to consumption areas.
Those giant pylons carry 132,000volts if not higher

Morning star 60amps pwm cc cost 198 dollars, same morning star 60amps mppt cost 600usd.
The Pwm operates at about 60v max.
The Mppt operates at 150v max.
The extra 400usd in cost is basically cos of this flexibilty in max input viltage

For solar calculations, using 3% loss and lower is a preffered optimal design factor than 5%

A+

eteebanky:
pls guys help me, I used master card ATM this time.....

According to here
"You may contact your bank to get detailed information or use another card/method instead."

You can try and not save the card you are using. If saved already, remove it. And try paying directly without saving it.

ceaser:
Woah. I hope seller isn't one of the mortalities of covid in China.

Some Chinese close down their shop due to bad reviews only to open another with another name. AE doesn't care. If you do that in places like Amazon, you may be blacklisted.

ceaser:
Lucky you baba. Me I still dey waiting mode till God knows when.

ojeysky:
It means I should keep hope alive then Because am yet to receive orders placed in feb

Weirdly enough I opened dispute and won. Tried to reach seller when I got the product and store is no longer in existence

ceaser:
Holders for 18/6/5/0s

Usually AE was a go to option but with China orders seriously troubled due to covid-19, I was hoping someone here will have them on offer.

Am I in luck?

Picked the one I bought in February last week.

This is interesting

www.nairaland.com/attachments/11787488_eanjtduu8aabawv_jpeg_jpegb97537e9139da9b894dd7d9c9a5ee958

mank1234:
I'm sorry sir. It will not happen again. It was intended for comic relief and not to cast aspersion.

On contactor wiring
https://youtu.be/_pzBBRjaw0M

On contactor purchasing
https://a.aliexpress.com/_BPGTy0

This contactor can easily be sourced locally. All you need is to know where to look. The dealers that sell MCB breakers, high voltage and LV parts often stock contactors. Or you can walk into any electrical shop and ask where you can get one, most electrical part dealers often know a dealer who sells such. You may have the issue of finding the type you desired, is it two NC and two NO? Most of the time you'll see only one NC with up to four NO. Anyways anyone looking for contactor should try the local vendor before going the AE way especially nowadays that it takes forever to get things shipped from AE.

gidieberry:
me i no get this Nland pm stuff, you fit msg me via whatsapp
To reach me faster on whatsapp CLICK HERE

Surprisingly not on WhatsApp. Email only.

jboixxx:
[color=#0000ff]Yeah but some sellers kolo. What A would agree with, B might reject citing AliExpress T&C blablabla. [/color]

Well, it depends on the seller, some may agree, others may not.

gidieberry:
can i have your contact bro?

Send a pm...

jboixxx:
[color=#0000ff]And it's actually possible? [/color]

I've done it in Alibaba, seller obliged and split order to make it happen. Dunno about AliExpress, but since Chinese will do just about anything to make that sale, I won't be surprised if the seller agrees to this.

All I did was explain to seller my bank has max limit per purchase, and asked him to split the order into two.

Nuel182:
Heard GTbank card limit per month is $500. How will someone be able to purchase items worth $800 - $1000 on AliExpress??
Or eBay

Tell seller to split order into two. Then pay with two GTB card (gotta collect the second GTB card from a trusted family or friend).

Barezzi:
Penuelseun,
Two independent Relays switching power to a load is very dangerous!
The likelihood of both latching the same time is very high.
Relays fail all the time, i work where this happens regularly...

To mitigate, consider using mechanically interlocked contactors. It's physically impossible for both to energise at the same time.

This is gold!

GeorgeD1:
brother, I've been offgrid for close to 2yrs now.
just recently before the lockdown (march to be precise), bedc was forced to send me a note complaining
that i haven't recharged my prepaid meter for a long while. i just laughed in greek

Why will you recharge? You should be selling excess generated power to them na. Lol

essegis:
Yeah, I don't have those Will Prowse white centered resistors but the pack I have has different ratings from 0.1ohms to I think 1000ohms sef. E plenty. But na normal small body resistors so I don't know if they will work or the exact rating needed for the discharge.

Is top balancing not working? You can always buy this capacity tester that can act as load.

I'm from the future, this drug will cure a deadly virus in 2020

Ibime:
Nigerian press and disrespect for the dead.

Why can't two 25 year old lovers die in peace again without these hurtful insinuations?

How do you know they died during sex romp. Are they not wearing clothes? This could even be generator fumes.

Western press - Two lovers die in each others arms while spending night together. Cause of death unknown.

Naija press - Two undergraduates die during sex romp due to drug overdose. Pictures inside.

The comment I was waiting for. The report is thorough thrash. How can they be 100% sure that the two even had sex when there was no form of autopsy? 100% pure unprofessional reporting, 300% sensationalist publication. But I guess the majority love stupid sensational junk journalism

garbamaza:
I came across this home solar air conditioner, purely operated with solar panels without need for batteries. Gentle men, I need your suggestions about this product.
Thank for your possible urgent responses.

It looks like a grid tie system. Not really something you will want if you are solely off-grid as I see where it is stated it automatically switches over to mains if the solar generated is not enough ie during cloudy times and at night. But it looks like something designed to help reduce cost of electricity/reduce cost of diesel (from DG) in offices that operate during the day that has a generator at work. In my opinion I think you are better off getting a low power system run off batteries that you can use at all time. But it all depends on what you want to achieve with it considering you may be looking at a system that reduces cost of electricity during sunny days/ reduce cost of fuel during the day.

ceaser:
I think inverter ACs have a way of saving energy when the room temperature reaches the desired preset.

That's one of the ways they are able to save energy.

Not really, at least not the inverter ACs I've seen. They continue drawing some current even when the room is cold.

ojesymsym:
I think I understand what you mean. You want the AC to shut down when temperature is already around 22 degrees centigrade right?
Okay, the blue knob allows for temperature down to a set value. You are right.
Can that thing handle the current requirement of an AC? I do not think so, it says there 2amps.

Check well. It says 10A at 250v. Good enough for a 1HP system. If something can handle a heater, I doubt it'll have a 2A maximum current rating.

ojesymsym:
I am not sure that one in the link will work for you because it will switch off when temperature gets high which makes it more suited for a heater than for an AC that you want to stop when the temperature gets low.
Most AC have the feature for setting the temperature anyway, why an external device?

The blue one. The idea is to save energy. You don't want the AC to be running when temperature is ok and draining juice needed by other devices.

ceaser:
Please folks.

150w/12v panel in 4s2p configuration

versus

300w/24v panel in 2s2p configuration

All for a 12v system on MPPT CC

All factors (Panel brand, solar insolation, wire types/gauges) being equal in both scenarios

From experience, are there gonna be any differences in charging input/efficiency from the panels in either scenarios?

The two scenarios appears to be same IMO. Though I'll opt for the latter due to ease of connection.

ceaser:
I think I've bumped into a binatone product on Jumia or maybe Konga that may work in that manner. I'll check if I can retrieve the info.

That will be awesome. Thank you.

Hi folks, my friend is looking for some temperature controller that can turn on/off air-conditioner at predetermined temperature at a remote off-grid site. I'm thinking of this.Does anyone have a better idea?

Rhyah:
Thank you sir...
Going for the 100A shunt, is it fine?
Battery: 220Ah
Inverter: 12V 1100KVA approx. 880
Charging current: 15A

Pls you could explain with some calculations so I can learn from that too
Thanks

It should work.

mank1234:
It's a power source automatic changeover switch. Switches to reserve power if mains power fails and returns automatically to mains when it returns. However, it doesn't have capability to put off the reserve power (generator)

There's a newer version of it that can be placed directly in a distribution box. It's about 6 times 18mm, meaning it takes same ways as 6 single pole MCBs. The newer version has very improved transfer time just like an inverter.
New version here:
https://a.aliexpress.com/_BUOPv4

Old version here:
https://a.aliexpress.com/_BP9r14

Oh now I get it. I have been using TOMZN products for a while now. They are reliable. Thanks for the detailed explanation

iKingsley:
this is fast. At least, if it arrives within 50 days, it's still manageable

Yeah, I think so too given the circumstance.

Darlinx01:
Guy na singapore post?

Yeah it's SG

earthrealm:
You will know, when you need it as well...

In the words of my mentor Jim Rohn..
When the student is ready, the teacher appears..

Observing in 3D...

My 2nd May order arrives Naija

iKingsley:
I haven't explored that payment method

Cool

iKingsley:
374.31 as of 5th June

I hope no "hidden charges"?