₦airaland Forum

earthrealm:
Buying used items may help you achieve your goal as well.
A client of mine would have 20 x 250w mono chinese panels, for sale next week, as a result of upgrade. Price would be 25k for each panel, however slight discount if buying more than 4 panels.

Mix of myhome, sunfit, flames panels

kibbutz123:
Soak a towel in a hot water then place it on the bumps for like 3 to 5mins then apply epiderm cream triple action on it,for seven days it will vanish

Canada2021:
Yes chat this number +2349071252530. He will gladly help you at an affordable rate.

khatea:
Link not directing me to ur watsapp.

migeoart:
Just landed Quality Non-Sticky pot
5 in 1 SET
Available in colors displayed
Pay On delivery available in lagos Based only!!!
For enquiry or to place orders call/whatsapp 08065784139

ojeysky:
Indeed, I actually don't know why anyone who knows about both options (especially household) will not prefer inverter AC. Everytime I put on my normal AC (bought before I got to experience the inverter AC) I just wish I could turn the clock

That said[b] I doubt there are central inverter AC which I guess will be appropriate for large supermarkets[/b]

ceaser:
...I can assure him that when his load requirements increases and it begins to make mockery of the efficiency his darling 12v appears to offer, he will not need convincing to up the system voltage....

SuleimanKano:
Good morning Engineers.

I trust everyone is keeping good and staying safe at this moment in time.

It my first time posting here although have been a regular follower of this great thread.

I need technical support on a project we're  trying to design for a client. However, the Professor who happens to be an Electrical engineer is way too busy for us to sit down and make a realistic design for the client.

In view of the above predicament, we're approaching the deadline for submission which happens to be tomorrow.

We're to design a solar back up system for a supermarket cooling system.

Based on our load analysis, 600,000KVA Inverter System is required, so we break it down to  60,000KVA x 10 Inverters.

Regarding solar panel, we decided to utilize 400W x 1500panels = 600,000W

To save cost, the Professor is of the view that we should do away with batteries. Hence, we are to deploy 300KVA transformer and 300KVA Perkins Generator.

However, new ideas are welcome on the best realistic design, installation and maintenance.

Feedback did be appreciated.

I await response.

CC
NiyiOmoIyunade
zeestone99
Ojeysky
kiekie1
JUO
mctfopt

NiyiOmoIyunade:
This is an interesting project indeed. Looks like a good use case for an hybrid system - AC coupled till eveningish and DC or mains/genny backup till 10pm

But you need to double check the numbers first of all.

600,000Kva is humongous - perhaps you meant 600Kva or 600,000Va? That is more approachable.

Also think of the space required to mount 1,500 panels of 400w each? Each panel must be at least 2m by 1m - I doubt your average mall has that much surface area to use.

This is no mean undertaking - we are happy to collaborate with you - please do reach out per details on signature.

NiyiOmoIyunade:
Yup! All Victron MultiPlus & Quattros support these advanced features natively.

You can set precise AC current limits on both AC Mains and AC Gen inputs and dynamically even adjust the limits of one input on the fly from VEConfigure or VictronConnect or GX Device (with a GX device you can even adjust the AC current limit over the internet)

Having set your AC current limit, you can then set PowerAssist boost factors (allows the inverter to borrow power from the DC bus to assist a Gen or Mains supply and prevent it from being overloaded). Thus a 2.5kva Gen may power over 5kva of loads with no stress on the gen - Victron afficionados catchily call this "Small Gen, Big Power"

Once the two above are set, then you still have a Dynamic Current Limiter that allows the inverter to smoothly transfer loads to a Gen AC input so the Gen sees no sudden shocks - this is much like how inverter ACs ramp up power slowly. The inverter absorbs the power difference and passes it to the Gen small small up to the user set limit.

In my case I am taking about a max of 4.5kva from a 5.5kva Diesel Gen - the Gen takes on the loads slowly over like 15minutes and doesn't even realise it is loaded 80% - it just chugs along happily.

The last feature is "Weak AC Input" - if you set this your inverter will take power from the worst of supplies - low frequency, low voltage, poor surge response and still charge the battery successfully but you sacrifice some efficiency as the power factor derates.

These are the features that make a premium product like Victron worth the extra expense - they do easily and reliably what other brands cannot even imagine to begin to do - again this is superior engineering as at today - in the future it may become a normal standard feature of all inverters.

godspeed:
Ok sir. I will continue with the 12v setup.
My energy needs are not really that high.

dollarnaira:
Yes sir

dollarnaira:
2 pscs of Samsung note 5
Available
Lagos
Working 100%

55k each

NENGIsmells:
all these broketards need to contribute money and buy fuel for u, it is not easy. i am spending money on data to watch ths shit life on internet. imagine the favour you are doing these ungratefull broketards

omotolsy:
Selling my Redmi Note 8 Pro.

ojeysky:
Folks using MPP hybrids, you may want to flip your inverter fan to blow inwards if you've not already done so or get an external one. It keeps the system cool, better performance and with less overall fan noise

Benjaniblinks:
I have been following this thread for a long time now.
I bought All the materials (60m dish 2lnb + strongest stg 9800a decoder) and did the installation my self. Total cost is ₦10300.
I got 150+ channels and all MBC channels is this normal?

dollarnaira:
Thanks
I v strapped my small ups of abt 1.3amp on it this morning.Lets see how it goes.

dapsyra:
We bought some of those ones after mopping up all the 55Ah cells we could find. They are fully built modules made from 20Ah cells. I still have two or three leftover modules for sale.

dollarnaira:
How do i get it pls?
1 or 2amp charger of 12v or 5v?

dollarnaira:
My friend's ritar battery 200amp was left uncharged after 2months,do u think local shops that charge battery for a fee can revive it? No swelling just not not charging again.Pls house,any solution to this?

dapsyra:
From my personal experience running LTO batteries at very low "C" rates, the cycle efficiency is about 99.9%. For comparison, the cycle efficiency of Lead Acid battery is about 70%

My bank is 700Ah and the highest instantaneous load it has ever seen is 100Ah. That is 0.14C on a battery that is capable of 10C

dapsyra:
I have the pouch cells. They are 55Ah, 2.4v nominal each. Those cylindrical cells are about 10Ah

emmaniche:
Hit me up on 08165471453 we go anywhere in lagos.

dapsyra:
You can say that again. Shipping and Customs duty were responsible for half the cost.

The battery bank is located in a very tight area of my power room, so getting good snapshots is very difficult.

philipbash:
ok get across to me

Ojolfc:
My brother 20k is not too much for 3-4 sitelite plus if the guy want to get you H.265 and multistream complaints Decoder.
Some installer will tell you to bring 12k but ask them which decoder are they getting for you.
#my2kobo!!!

mctfopt:
What system voltage are you running?

dapsyra:
PROs:

At more than 20,000 cycles, the LTO chemistry has the longest life of all the Lithium batteries.

It can be discharged to 0v without any serious consequence. Some manufactures actually ship them out at 0v state of charge. Some of mine were at 0v when I received them.

LTO does not combust due to overcharge or any other abuse. There are a lot of LTO abuse videos on YouTube.

It can be charged and discharged at a very high 'C" rate (10C or higher). You can fully charge a LTO battery in 6minutes if you have a capable charger.

I have used mine for over two years now and I have not noticed any loss of capacity. If I consume 300Ah, it will require less than 301Ah to recharge. The cycle efficiency of mine is 99.9%.

It does not heat up during charging of discharge. It stays at room temperature 24/7.

As at today, LTO is the best battery money can buy.

CONs:

It is much more expensive than other Lithium brands

It is heavy, So, it is not very suitable for mobile application