₦airaland Forum

Millions of dollars ko, billions of naira ni

bigrovar:
don't mean no disrespect to sunshine panels. Just won't use it for my client if the contract runs into millions of dollars. Not when you have the likes of Suntech, Canadian Solar, Yingli, solarworld. A service that makes you millions of dollars deserves the best in terms of usability and upgrades.

Whats wrong with sunshine solar panels bro?

bigrovar:
Done all that. Problem is Nairaland is huge and is valued multi million dollars. Hence makes millions for it's owner monthly. All this off the back of content creators like us. The least that could be done is at least upgrade the system to 2017. I am a member of many forums from xda to power forums to solar talk. nairaland is the biggest and the one with the worst user experience. It's still based on simple machine forum when it should have moved to something premium like vbulletin which is what most major forum is based on. It's like having a billion dollars contract to deploy off grid solar but you did the job with sunshine solar panels + Roy solar pwm charge controller. That's the metaphor for how NL is being managed.

So Nigeria history started with Atiku n Obj in 1999 right? When Buhari overthrew a democratically elected govt in 1983 how old were u? Listen, remove emotions and think! Comparing Atiku with Buhari in terms of modern governance and administration is like comparing CNN with NTA Ibadan!

nkemjacob2:
wen atiku and ObJ are laying a bad foundation 4 d Nigeria governance system, how old re u?

Its 3*4 and not 4*3. 3*4 will be amounting to about 120V or less unloaded

mcci:
Do you not risk damaging your CCs on very cold mornings? It may exceed the recommended 150Voc

Atiku has administrative skilss, has ability to create wealth and he is learned and tolerant unlike the bigot illiterate we have there. D bigot is a repeated failure

ajebuter:
l agree...at least despite his corruption prone tendencies ,he is not a religious or ethnic bigot...At least not blatantly open as Baba bubu

Atiku is far better than Buhari by many indices

nkemjacob2:
Atiku has started campaigning for 2019. I will tear my national passport if u win.

People are more careful with expensive phones. Could be handling cos my bro is still using his techno after 3yrs

geronimoedeh1:
We talking about Majority not minority.... bought and used 2 tecno fones last year....just developed one funny fault and once repaired it becomes crap...still bought htc by dec,and stil rocking it now...so in all,i used 3 fones last yr instead of one because of craps not becox i wanted to...

Can you compare small country Dubai with India? Can you compare south Africa with Nigeria? Nigeria is less developed than the way its hyped.

Tolexander:
I didn't say population determines development.

Don't misquote me.

I said the performance and battery life has not diminished much. Underlying word is much. I never said it hasn't diminished at all. Comprehension is not that difficult

rookidmart:
Haba!


If you have to shill at least do it reasonably.

If you believe that your battery life is still the same after 4 years then take the next plane to Silicon Valley and become a billionaire with your phone and battery that defy the laws of physics.

I have been using a techno phantom pad for almost 4yrs now and it has not diminished much in performance and battery life.

peacettw:
I will never use a tecno phone ever again. I have used 3 and they all died prematurely and miserably. Most not lasting up to 6 months. If you have the cash, please avoid tecno

I need reco on the latest tablet from techno

Run gen? Generator is haram! forbiden

Barezzi:
Nice one chairman...
Personally, it's cheaper to run the gen for a few hours a year than spend millions building a large battery bank.
Especially with such a huge PV array.

Your battery bank is okay, i understand the rule of thumb is 100AH for every 1kw array.

So for a 7kw plus array, your almost 700Ah bank dey in order.
I don almost perfect my plans to rob bank. I wan be like you

Suit yourself but when you have done a practical system that works vis-a-vis the opportunity cost then i'll be glad to reapply. There is economics in solar technology!

jazzman2:
Sir, your summation above just shows you don't know much about gridtie nor microinverters. Why would u need a separate standalone gridtie inverter with microinverters? You have already converted DC to AC, so why feed it to another gridtie inverter? Like I said before, do a proper research before publishing on a public forum. Try googling AC coupling, gridtie with battery backup and the info is there for you.

Thats y i always advocate for almost flat panel orientation. the slight tilt is the natural washing angle else flat is perfert

GeorgeD1:
bigrovar,
like i said in my reply to earthream, it is a calculated attempt to obtain maximum yield in the spring/autumn
months and the readings on my cc seem to be proving me right. although again, space availability had a part
to play in my decisions. if you check my south side pictures, you will notice that the roof is almost filled up facing
south.

its like getting the best of both worlds, in the sense that while the north facing panels will give me optimum harvest
during the spring months, the south side will kick in and take over the show during the winter/harmattan times
of the year.

yes, the charge controllers are both connected to same battery bank.

Try to get a grid-tie inverter without a battery bank in Nigeria and tell the forum how the system performs. I will be more than happy to reapply

jazzman2:
Sir, I never implied that the sole aim of using gridtie inverters is to roll back NEPA rates. In fact, I mentioned that grid tie does not necessarily mean sell back to grid. I am trying to highlight the high energy conversion efficiency of using gridtie inverters off grid that are AC coupled to bi-directional inverter chargers if the primary loads are daytime AC loads. Pls don't mid-interprete my words. Thanks

Chairman,

Read your link very well and be calibrated. Like i said previously, do more research on what a grid means and where to use grid-tie. I have done this research but just for knowledge sharing, a panel with a micro inverter attached converts the panel DC voltage to AC. This AC is transported to the grid-tie inverter. The grid tie powers the house loads and feeds the excess to the grid while when the panel is not generating enuf, collects the deficit from the grid however it is used in a situation where there is constant grid power. the wisdom behind this arrangement is for cost savings as you can sell to the grid as well as not needing backup batteries. If you must have backup batteries then you will need to incorporate offgid inverter. Mind you, you dont need charge controllers in this case. Solar utility companies use the grid tie/micro inverters most especially

jazzman2:
Pls Sir, do some research. You are completely wrong, all microinverters in the market today are gridtie inverters also. Check out this link:
https://www.solar-electric.com/residential/inverters/grid-tie-inverters.html

If there is no grid...there are better designs to use than grid tie inverter(its like using helicopter to go to church ). Grid tie inverters are expensive and using it for basic purposes that can 100% be fulfilled by normal inverter is not cost effective. Gird tie inverter is not applicable in Nigeria.....using it is just for sensation in my own opinion

Barezzi:

Na you dey call Micro inverters. I never mentioned it.
You CAN connect a grid tie inverter to the output of a bi directional stand alone inverter/charger. This forms a micro grid... So irrespective of what happens to the national grid, the grid tie inverter will still stay synchronised with the stand alone inverter.
You don't need NEPA to use a grid tie inverter.

Kindly recheck these inverters and be specific. Grid tie is grid tie and micro inverter is micro inverter....different

jazzman2:
The microinverter I mentioned here is just an example. There are many inverters out there than can AC couple with a bi-directional inverter charger and they all have 1 common identity as grid-tie inverters. The microinverter I mentioned was to emphasize the high overall energy conversion efficiency of AC coupled system if your load is entirely or mostly daytime AC.

Micro inverters are different from grid tie inverters. grid tie inverters are different from offgird inverters. Hybrid inverters are different from standalone inverters. high frequency inverters are different from low freq inverters, transformer inverters are different from transformerless. Lets not mix grid-tie and micro inverters...they are very different

jazzman2:
The keyword here from Barezzi is "microgrid" and not the national grid. The overall efficiency of AC coupled systems, especially when microinverters are used, are in the high 90% and is suitable when you have high daytime AC loads to run.

My Guy, grid tie is different from micro inverters. what you described is micro inverters where every panel has its own micro inverter and combined to power the house loads directly. grid tie as the name suggest is meant to work with the grid. Also about a large battery bank, irrespective of your panel array capacity, the sunlight intensity variation determines also if your bank should be big or small. A person in the North can have a small bank as sun intensity from sunrise to sunset is quite constant unlike southern Nigeria especially the freshwater swamp where there is appreciable cloud covers on a daily basis and even very dull weather for days, you dont want to make massive investment that doesnt work sometimes no matter how few.
Hybrid inverters are those with inbuilt charge controllers

Barezzi:
This is patently untrue egbon...
Grid-tie/Hybrid inverters can be used with or without back feeding to grid. It is not the only reason why most folks purchase them.

You grid-tie when most of your loads are consumed during the day. The PV inverter converts DC to AC which is then consumed immediately.
Later at night, your stand alone inverter inverts DC from the batteries to AC to feed night time loads.

The point i'm trying to make is if one has a large PV array, it doesn't make sense to also build a large battery bank.
Unless such an individual's night time loads are huge.

Should slightly be tilted towards south(6°) , find a way to make this happen esp as ur panel is just 1...u want to get as much power as possible.. Also use thick cables to reduce losses.

Feshizzy:
Good day everyone,

Abeg make una help me out!

We got one 250w 24v mono solar panel
With a pwm solar CC,

Because of how the roof is,
It is facing the east,

And at 2:00Pm it was producing 1.4ah when we checked the CC,

Please note the battery on the inverter was very very low,

Please any possible way to optimise more abit?

Grid tie is used when there is need to feedback to the grid esp during excess generation. In this arrangement, when there is less generation, the deficit is gotten from the grid while when the is excess generation, the extra is feed to the grid and the person gets credit from the utility company which he can consume later during deficit or paid in some other form.....not applicable to Nigeria but countries like Australia

Barezzi:

Grid-tie to the "AC out" of his bi-directional inverter-charger.
This creates a micro grid that the grid-tie inverter will synchronize with.

Thanks...I buy a lot of stuff from aliexpress so I know my way there however the only one I saw with appreciable spec including sim card capability is the huawei media pad M2. The price though is scary.
I am not particular about techno just brands with high value for money

MizMyColi:
Hehehehe

I'm not always chanced like I was then.

I want to recommend Droipad 8H, but the downside is the RAM.

I bought one for my boss and he sent me to buy another one for someone.

Though someone on the forum is claiming that his own gave him charging point issues.

I will get feedback from my boss on Tuesday as to the performance of his own.

The RAM is 1gb tho.

To me, no Tecno tablet appeals to me now, in terms of RAM and clock speed. Maybe they will up their game later this year sha.

Have you thought of getting other brands.

I've seen some cheap and fine specs tabs on Ali express.
But would you be willing to take the risks involved?
They are serious risks btw

Hey Mizmy

Only God knows y you left politics section. Anyways, could you recomend a techno tablet with >=8" screen and >=3g ram or related products?
Thanks

MizMyColi:
I don't like the way Gionee looks.

When I can afford it, I would love to use a Samsung device. The latest I mean.

But for now, I'm really enjoying my Tecno Camon CX

Thanks Op. please can you also recommend the best 5 tablets?

NaijaTechGuy:
Every OEM is trying to release the best devices and add as many features as they can to their flagship devices. In recent developments we've seen smartphones with extremely powerful Snapdragon processors, 4k Screens, Massive battery capacity, dual cameras , large storage space and RAM capacities that can compete with a average laptop.

Here's my list of top 7 Android phones that run on Octa-Core processors-

1. Samsung Galaxy S8
In first place on my list is the Samsung Galaxy S8 which sports a Super AMOLED 5.8-inch QHD screen with 1440 x 2960 pixels (570 ppi) resolution. The Samsung Galaxy S8 is powered by a 1.9 GHz octa-core Samsung Exynos 8895 processor (Qualcomm MSM8998 Snapdragon 835 – US model). It has 4GB of RAM and packs 64GB of internal storage (expandable to 256GB via microSD)
The rear camera of the S8 packs 12MP with f/1.7 aperture (including phase-detection autofocus, OIS, LED flash) while the front comes with 8MP, f/1.7 (autofocus & Auto HDR). The Samsung Galaxy S8 runs on Android Nougat and is powered by a 3000 mAH non removable Li-Ion battery with (Quick Charge 2.0). Connectivity options include Wi-Fi, GPS, Bluetooth, NFC, 3G and 4G. Samsung Galaxy S8 costs about N285,000



2. Sony Xperia XZ Premium
Next on the list is the Sony Xperia XZ Premium. The Xperia XZ Premium sports an IPS 5.46-inch screen and with a 3840 x 2160 pixel resolution and an excellent (807 ppi). Under the hood is a Snapdragon 835 SoC.
It comes with 4GB of RAM and 64GB of internal storage (expandable to 256GB). This Sony flagship is water resistant with an IP68 certification. The rear camera is a 19MP, f/2.0 aperture (predictive phase-detection and laser autofocus) while the front is 13MP, f/2.2 . aperture . Keeping the lights on is a massive 3230 mAH(Quick Charge) . It runs on Android Nougat (7.1). It costs about 275,000 naira.


3. Vivo X7 Plus
The Vivo X7 Plus sports a Super AMOLED 5.7-inch full-HD display and 1080 x 1920 pixel resolution (386 ppi). Under the hood is a 1.8GHz octa-core Qualcomm (MSM8976) Snapdragon 652 processor.
It has 4GB of RAM and 64GB of internal storage (expandable to 256GB). The X7 Plus packs 16MP on rear camera (LED flash and PDAF). The front camera also comes with 16MP, f/2.0 aperture, with LED flash. It comes with Funtouch OS v2.5.1 running on top Android Marshmallow. It also has 4G connectivity. X7 Plus comes with a massive 4000 mAH battery and supports fast charging.
This device costs about N280,000.



4. Gionee M2017
The selling point of the Gionee M2017 is the powerful battery. Gionee M2017 comes with a 5.7-inch QHD AMOLED screen with 1440×2560 pixel resolution and curved edges. Powering this device is an octa-core (4×1.95 GHz Cortex-A72 & 4×1.4 GHz Cortex-A53) Qualcomm Snapdragon 653 SoC coupled with 6GB of RAM.

The phone comes with 128GB of internal storage which cannot be expanded. What else do you need to expand here?


It has a dual camera combination of 2MP+13MP, and an 8MP front shooter. This device runs on Amigo 3.5 UI on Android 6.0 Marshmallow. The device comes with a massive 7000 mAH (Quick Charge 3.0).
Like I said big specs comes at a cost. This phone costs about N395,800


5. Huawei Honor Magic
This device comes with a 5.09-inch AMOLED QHD display with a 2560 x 1440 pixels resolution. The display has curved glass on both sides. It is powered by an 1.8GHz octa-core. Interesting the processor is Huawei's Hisilicon Kirin 950 processor. It has 4GB of RAM and a Mali-T880 MP4 GPU. The phone packs 64GB of storage which is not expandable unfortunately. It sports a dual 12MP camera setup on the rear side with an f/2.2 aperture along with an 8MP front-facing camera. It runs Android 6.0 Marshmallow OS with Honor Magic Live OS UI atop and is powered by a 2900 mAH battery. The device costs around N205,000



6. BlackBerry Keyone
TCL took over the smartphone production from Blackberry. The BlackBerry Keyone comes with the signature QWERTY keypad.
It also comes with a 4.5-inch full-HD (1620×1080 pixels) IPS display with a pixel density of (433ppi) and Corning Gorilla Glass 4 protection. It is powered by a Qualcomm Snapdragon 625 octa-core processor clocked at 2GHz coupled with 3GB of RAM and an Adreno 506 GPU. It also comes with 32GB of internal storage (expandable up to 256GB). The phone sports a 12MP rear camera, and 8MP front facing camera with a wide-angle lens. With Li-Ion 3505 mAH battery. This device costs around N203,000.



7. Asus Zenfone 3 Ultra (ZU680KL)
The device comes with a large IPS 6.8-inch full-HD display with a 1080 x 1920 pixel resolution (324 ppi). The Asus ZenFone 3 Ultra (ZU680KL) is powered by an octa-core Qualcomm (MSM8976) Snapdragon 652 processor and it comes with 4GB of RAM and Adreno 510 GPU. The phone packs 64GB/128GB of internal storage (expandable to 256GB via a microSD card) . The ZenFone 3 Ultra packs a 23MP primary camera on the rear and a 8MP front shooter. Keeping the lights on is a powerful Li-Ion 4600 mAH battery. The Zenfone 3 costs N292,000

Oga GeorgeD1
From my count these are 315W x 24pcs amounting to 7569W ! My question is do you intend to power houses adjacent to yours, the whole compound else how do you intend to have a good capacity utilization? Kudos once again.

GeorgeD1:
all,
in continuation of my system upgrade activities, i was able to secure a number of 315w solarworld
panels which were installed about two weekends ago.
recall that i gave out my old 200w suntech panels recently. this was to make way for higher wattage
panels which in my calculations will give me better performance while occupying less space.

thanks to kiekie for the speedy delivery. all through our discussions, i saw consistency, depth of
knowledge and attention to details. even when i almost made up my mind to go elsewhere, his
tenacity and business like approach to things pulled me back in. and in the end, i'm one more happy
customer adding to his resume of successful deals.

keep it up brother!

The whole setup and concept is just glorious! I'm truly inspired.....when I grow up sha

GeorgeD1:
monitoring in progress...

go with 3 x 3 configuration. 4 x 2 would be cutting it close to the upper limit....risky

mcTrinity:
please gurus.....

panel specs
250w poly (Sunshine solar)
Vmp- 29.5v
Imp- 8.47A
Voc- 35.5v

CC specs
Epever eTracer 60A Auto voltage (150v max)

currently, 8 of those panels are connected in 4x2 configuration on a 3.5kva/48v inverter with 400ah battery bank capacity

is the configuration safe for the CC?? or should I ask the client to get one more panel and do 3x3 configuration?

I've recorded 134v on the CC around 8am
thanks guys

buzz me offline...see my signature

Deeni131:
how much will it cost me to get that.

Was Nigeria great before?

WhistleB:
Nigeria will be great again.

The inverter looks cool indeed however i may join the band wagon after ur experience

bigrovar:
Thanks a lot for the detailed response. Indeed that Axpert series of inverters are hugely popular in most OECD countries like Australia and South Africa. I would be considering them now so that I can join the club of cool kids with their cool wall mounted Inverters. I just wished the pure inverter units without the charge controller bits are also sold in Nigeria