₦airaland Forum

Jefferyzz:
I av recommended him to a friend who go few items from him. He didnt give any bad report on the items till date. So yes, he's legit. D problems with some installers is that dey inflate prices. Some will still not get u d quality dey promised in the end. Buy ur items ursef n call installer to put them together.

brightk:
abeg na... this one u de introduce fourier series. E remain laplace transform for u to add.abeg allow us to manage our inverters in peace

futurenix:
This one serious. It's not upto a month you mentioned buying this item and it's already giving issues.
The one I have does not fan continuously.
Check Utility charging current if it's set to Max. ( If yes, U can reduce to 60-70% if the fan still blows continuously).

Can you post the picture of yours here atleast people will be aware?

jonescosmos:
In simple terms, there are 3 types of Inverters.. . The cheap one used to simply be square-wave, that is ON + for half the cycle and - for the other half cycle. . . OK, for lights, and heating equipment, did work with computers and some other stuff, but probably not very good for them.. . Very high in 3rd harmonica and other odd harmonics as well. . . Then they improved these by having an OFF period between the + and - .. . These are “Modified Square-wave” but the naughty manufacturers call them “Modified sine-wave” which they certainly are not.

Then, in the old days, we used to have real TRUE Pure-Sinewave Inverters.. . These were proper sine-wave and very clean, even cleaner than the grid supply, free of any harmonics or any other products. . . . They worked very well, but they were inefficient at converting DC to AC, and so gave off a lot of heat.

The more recent, particularly larger modern Inverters use a form of Switch-mode, often referred to as PWM. .. They switch the DC feed to the output, often through a transformer, in very fast On/Off pulses. . . The On and Off period ratio, sort of matches a sinewave approximately. . . . So with efficient output Filtering, their output is fairly close to a sinewave. . These are the true Modified Sine-wave inverters. . . The filtering blocks most of the harmonics, particularly the higher frequencies, their outputs are good for anything that normally works from grid power. . . But they are NOT True sinewave as manufacturers call them, but they are very power efficient, typically up in the high 90’s %. . . Some claiming 98% efficient, whereas the actual True Sine-wave, as I mentioned before, from Linear Inverters, were perhaps only about 60% efficient.

The outputs of inverters that are power efficient have a lot of harmonics.
Back in Engineering 201 (I think it was the sophomore year) we learned about the Fourier transform and how any waveform can be created with a series of sine waves with different frequencies. frequencies.

The attached picture shows what happens as you add odd harmonics (3*F, 5*F, 7*F) to a sine wave. You can see the sine wave starts looking like a square wave.
A square wave, or any rectangular switching waveform, has a bunch of harmonics present that are often significant at more than ten times the square wave frequency.

For some equipment this is no problem. A lot of components today such as chargers and displays just rectify the AC input right away. Harmonics either don’t matter or they are mostly filtered out and don’t cause a problem.

Magnetic equipment, such as motors and transformers, are not so forgiving. The magnetic material in most line frequency magnetic components is a silicon steel alloy that is chosen because it works well at low frequency, 50 to 60 Hz. The losses of silicon steel increase rapidly with frequency. If there is significant energy at 500 to 600 Hz the loss of the magnetic material causes it to heat up.

Things like refrigerators, fan motors and old equipment with a line transformer can all be heated enough to cause failure.

In many pieces of old equipment the AC inputs are not as well filtered and the higher frequency harmonics can cause noise and interference.

An inverter that doesn't produce pure sine wave energy can have a number of negative effects, including:

Reduced efficiency and increased power consumption. A non-pure sine wave inverter typically has lower efficiency than a pure sine wave inverter, which means it requires more power to produce the same amount of energy.

Reduced performance of some electronic devices. Some electronic devices, such as some types of motors, are sensitive to the type of power they receive and may perform poorly or not work at all when powered by a non-pure sine wave inverter.

Increased electromagnetic interference (EMI). Non-pure sine wave inverters can produce more EMI than pure sine wave inverters, which can interfere with other electronic devices and communications equipment.

Reduced lifespan of electronic devices. Some electronic devices, such as some types of motors, may have a shorter lifespan when powered by a non-pure sine wave inverter.

It is important to note that these negative effects may vary depending on the specific device or equipment being powered by the non-pure sine wave inverter. It may be best to consult with the manufacturer or a qualified technician before using a non-pure sine wave inverter with certain devices or equipment.

brightk:
abeg na... this one u de introduce fourier series. E remain laplace transform for u to add.abeg allow us to manage our inverters in peace

Uchman81:
The utility charging current is set at 20A, the max is 30A
While the other charging current is set at 60A I guess that is for PV.
When you told me you Cook with yours, that convinced me it's a great product.

yemi2plus:
Do any of our installers or distributors have original 400W Jinko panels? If yes, what's your price and contact info?

Immanuelar:
Hello gurus,
Please I'm about getting some solar materials from justcallmenu.el here. I would like to be sure if anyone has patronised the seller without regrets in terms of quantity. Main concern is that some prices he gave me are much cheaper than what installation engineers quoted. E.g he stated 10kwh felicity lit battery as #1.35m against #1.7m quoted by engineer; felicity 5kva hybrid inverter as 350k against 550k quoted by engineer.
This is nothing personal, just making enquiries before purchasing an expensive item.
Tnx.

brightk:
Am in need of a 2.5-3kva 24v inverter with lifepo4 charging capabilities

Immanuelar:
Hello gurus,
Please I'm about getting some solar materials from justcallmenu.el here. I would like to be sure if anyone has patronised the seller without regrets in terms of quantity. Main concern is that some prices he gave me are much cheaper than what installation engineers quoted. E.g he stated 10kwh felicity lit battery as #1.35m against #1.7m quoted by engineer; felicity 5kva hybrid inverter as 350k against 550k quoted by engineer.
This is nothing personal, just making enquiries before purchasing an expensive item.
Tnx.

ojeysky:
Installer may be quoting actual 10kwh lifepo4, a 10kwh Felicity lifepo4 is around 7.5kwh actual. Also there are various hybrid inverter, the spec determines the cost.

Immanuelar:
I doubt that. But, where can one get the ACTUAL 10kwh felicity lifepo4 then?

ojesymsym:
Guys, for those who can attend the annual Nigeria Energy Conference is starting today at Landmark Hotel, VI Lagos. It is usually an opportunity to meet directly with suppliers, learn what the new trends in technology are, meet international suppliers who also come to the conference yearly, and also know the direction of government policy with regard to renewable energy.

I could have posted the link to access it but I am not in any mood for one BOT to disrespectfully ban me, so I suggest you google "Nigeria Energy Conference" and preregister to attend if it is something that ticks your fancy.

Those who attend can also share with us whatever new innovations are in the pipeline so that we can as solar enthusiasts position ourselves to be at the forefront of implementation.

FEGEITOK:
When the guy you quoted went full throttle, I was almost tempted to disclose that I once into networking. Until I discovered that true money does not lie in that part of IT and changed gears and thank God I did.

I know another guy who has become a billionaire from the switch. Hopefully, I will get there someday.

samir101ng:
I have been reporting and posting this on the thread & DIY Solar Telegram group for a while now. I attended the conference flying in from Abuja for three 3 days. The conference this year was even more massive and had a lot of Vendors in attendance from Fronius, Victron, SMA, Anern, Felicity, TBB Power, Xtra Power, SRNE, etc. I will post some pictures from the event soon. The conference has had maximum exposure as the current minister of power Mr Adelabu was at the event. I have also been seeing their sponsored posts on linkedin, youtube and online.

samir101ng:
I have been reporting and posting this on the thread & DIY Solar Telegram group for a while now. I attended the conference flying in from Abuja for three 3 days. The conference this year was even more massive and had a lot of Vendors in attendance from Fronius, Victron, SMA, Anern, Felicity, TBB Power, Xtra Power, SRNE, etc. I will post some pictures from the event soon. The conference has had maximum exposure as the current minister of power Mr Adelabu was at the event. I have also been seeing their sponsored posts on linkedin, youtube and online.

isangjohnson:
Dollar is about to hit 1k and everything about RE is imported.
How are we going to manage the cost of items, especially for those on tide budget?

Valto:
it is already 1k+ on virtual cards used by folks to order from Aliexpress.. we will all survive

kindlyheart:
Please what is the app name

Valto:
chipper-cash

ameh99:
grade "A prismatic with full capacity 100AH 3.2v prismatic cells in stock
call/whatsapp 09068448005

swagifted:
My people in the house Sol-Ark Vs Victron who goes over who

Immanuelar:
I doubt that. But, where can one get the ACTUAL 10kwh felicity lifepo4 then?

gadgetplanetng:
Looking forward to getting & reviewing mine

brightk:
dont say u were not warned. Premium tears awaits u

samir101ng:
I have been reporting and posting this on the thread & DIY Solar Telegram group for a while now. I attended the conference flying in from Abuja for three 3 days. The conference this year was even more massive and had a lot of Vendors in attendance from Fronius, Victron, SMA, Anern, Felicity, TBB Power, Xtra Power, SRNE, etc. I will post some pictures from the event soon. The conference has had maximum exposure as the current minister of power Mr Adelabu was at the event. I have also been seeing their sponsored posts on linkedin, youtube and online.