₦airaland Forum

IYGEAL:
The only thing I know about the panels right now is that they are all 12V 150W. I am not sure about the current.

The CC is 30amps 12v/24v

There should be specification sticker on the Panel and on the CC you can take the picture of that. However i think 2s2p should be fine but it will be good to see the spec do as to be certain.

ojeysky:
So I got 5units of these fushiai desktop and standing fans for my use, other DIY needs came up and want to sell 2units(one desktop and 1 standing) from them. Anyone interested should contact me. They are still brand-new 40k firm


[img]
https://www.youtube.com/watch?v=SL9gFXIJRak[/img]

Pictures of the fan attached. Like I said I have 1unit of the standing and desktop for sale.
I also have a few solar wireless bells as well (picture attached)
My qasa can now retire

IYGEAL:
Okay. Thank you very much.
Lastly, which of the arrangements would give the CC more current/power or otherwise to charge the battery?

Would it be to connect all the 4 pieces of 150W in series or two series and parallel?

What's the specs of the CC and the ratings of the panel?

Someone posted a powmr MPPT for sale some time ago but can't seem to find that post, I need one please quote or reach out me if it's still available.

IYGEAL:
Meanwhile, I have a dilemma I would appreciate honourable gurus in the house to help me clear.

I read here recently about solar panel connections. Now I charge my 12V 200AH Quanta with Epever 30amps mppt SCC which is being powered by 4 pieces of 150W mono panels. I connected these all in parallel. The dilemma now is whether I should instead connect them 2s2p as opposed to my current arrangement (4p). I was afraid going with 2s2p would produce 24v and apparently damage the battery.

I'm just an enthusiastic newbie

What you need to pay attention to is the Max voltage allowed by the CC that is what is important, the CC does the job of charging your battery at 12v even if the input to the CC is more than that.

Intbrew should move na..... Meanwhile seplat is taking relay race!

Anyone with LFP cells for sale should kindly contact me, minimum should be 100AH capacity.

futurenix:
Yea, and as long as there are still lead acid with good performance, it's still going to be some users preferred choice. Someone I was introducing LFP to even gave me the popular quote " the devil u know is better than the angel you don't know". See my digits

Zero8one8onesix7one97nine.

s

Okay will ping you on whatsApp

earthrealm:
ojeysky , mank

The change to Lipo4, may not work, as users budget was only four batteries, it was a battle to get him to agree to 8 batts.
2ndly, am not sure his inverter supports Lithuim charging.

The 6v 400ah thundervolts rated @20hr is part of my concern, cos when you change the rating to @10hrs as compared to the 12v 200ah quanta batt rating they may actually turn out to be 350ah

3rdly, the 4s2p connection of the quantas vs the 8s1p of the thundervolts, i prefer the single series connection of the thundervolts, just wondering how to connect HA02 balancers to them in 8s1p

Lastly, what is the likely avg price of the lithuims you mention?.are they readily available in country now?

Seems there has been an upgrade to the ha02, ha12, shows the actual battery voltages via a phone app!
Magnificient, the major challenge i had with ha02 was seeing what was going on/knowing if it was working or not

If he can agree to eight batteries of quanta price range then it should be easier to get get 350 to 450AH of lithium.....the charging aspect may then be the only stopper.

So I got 5units of these fushiai desktop and standing fans for my use, other DIY needs came up and want to sell 2units(one desktop and 1 standing) from them. Anyone interested should contact me. They are still brand-new 40k firm


[img]
https://www.youtube.com/watch?v=SL9gFXIJRak[/img]

ceaser:
Really, I don't think much thought needs to be put in that even if it appears that way.

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.

In the journey of AE, we need to crawl first before we walk and then run. It is good experience, though not sacrosanct, to go thru 12v system settings so that you'll know the proper comparisons between the different set points.

I still retain some 12v system set up. Lithium chemistry made my adoption of higher system voltages easy since I have to worry less about lead acid balancing and the hassles that come with it. I installed a 24v system barely 6 months ago and when I realized what I'd been missing, I am already accumulating requirements for a 48v system to come online in about 2 months time. Even now the way I look at the 12v systems is the way a husbandman looks at his layers that has reduced egg output: should I just off these layers and fry them chop or make I just sell them or dash them out?

I'm seriously toying with the idea of connecting the two 12v LFP (different brands) in series to get a 24v even though it appears the in-built BMS will not tolerate series connection. The worst that can happen is to lose the BMS, but the cells will still be alive, right? Please what do y'all think?

Oga NiyiOmolyunade few posts ago said he was already giving out items that had been decommissioned and remained redundant. Subsisting on a 48v system now, I believe those redundancies aside from the "endangered lead acid batteries specie" also include inverters and accessories of lower voltages. These are signs of improved standards; these are beautiful stages that everyone here will navigate thru.

Do you mind elaborating on highlighted section? I remember in one of my previous posts I mentioned that there may be more run time on 48v systems and 24v system with same capacity and load, will be good to hear your experience.

futurenix:
Updated. Though it's not your type of chemistry but it's a good battery. Anyone in startimes transmission station can attest to the performance of the UPS model.

I have people that still prefer the lead acids o, infact they are much more and I don't think that will change anytime soon
I missed your contact info

mank1234:
When taken to same terms both battery are same. One is 12V 200AH @ 20A draw while the other is 6V 400AH @ 20A draw. So basically, same avaliable total energy at that current draw - 2.4kWHr

The only diffrenece between them, if the specs are true, will be how they maintain capacity at higher current draw.

Hmm...I think total should be more than that @48v would be about 19kwh and if 50% ceiling is applied, total available would be half of that. Nevertheless both configuration are same capacity wise but I guess durability would not come in in terms of brand

emmanuelewumi:
Management will utilize it, in the best interest of the shareholders and the company

PETERiCHY:
SEPLAT was selling at circa N150 in Jan 2016

BARGAIN HUNTERS TAKE NOTE!

50% profit after 4 years....hmmm okay.

Zagee:
They should please give me my dividend, I am currently positioned to jump out of the bus with a +50% on SEPLAT. �

How, was seplat at below 200 at any point,.... Perhaps you meant +50 naira...... Enjoy your loot and for Guinness, drink responsibly

Trippledots:
please my one and only appeal is for you to use inverter ACs for this size of project.

@niyi...when the roll is called up yonder, biko i de here too oh.

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 I doubt there are central inverter AC which I guess will be appropriate for large supermarkets

futurenix:
We have these Panasonic energy storage batteries that just arrived for sale.

12V ,105AH with 34kg net weight

Just 13units remaining

N.B: it's for energy storage and not the UPS brother.

Contact me if you are interested.

More details please, battery chemistry and cost required

Why not put in your prices to make it easier

ojeysky:
12v Lifepo4 chargers, balancers, smart BMS and ANT BMS, still available

Still available

ceaser:
It's good to think of LFP 3.2v 1000ah or 2000ah, but you're gonna need one hell of a BMS to charge the big bank that results, maybe a starting point of 300A BMS of any configuration that is adopted.

I think that using smaller banks of maybe 200 amps battery in any config of 48v to 180v each with its own BMS, then connecting them in parallel will be better.

EV vehicles use battery packs in 48v or 60v nominal and a number of this are connected in parallel to form their banks, I assume. I may be wrong though as I am yet to confirm that. But I know that the Tesla car battery packs that some show on you tube are in 60v nominal.

Sure that's the idea, there are BMSes with such capacity ANT is rated for 320A, if you modify the default cables that comes with it one should be able to pull up to 250A to 300A off it but there are other high capacity BMS in the bactrium pool. You certainly don't want to use small banks in several parallel for such a humongous set-up

earthrealm:
yes o, @NiyiOmoIyunade if he handles the job, and the owner doesnt mind, we would love to see some of the calculations.

while LIPO4 owuld be a first choice, should battries be considered. 2v 1000ah batts exist, and higher AH, may exists if one digs deep. lining upto 90 units of 2v 2000ah on a 180v inverter would create a super massive bank, with the beauty of all of them being in series, even on 48v inverter, 24 units would be an impressive bank

GWL have some 3.2v 1000AH Lifepo4 cells, I have not seen a 2000AH Lifepo4 but am sure it exists somewhere. I will certainly pick LFP over a 2v gel/AGM 1000AH/2000AH

ForkDragnet:
Let’s hear from shinner2010

Is shinner2010 no longer reliable?

safepaulooo:
Could this be true that Naira is officially devalued to N379 to dollar

https://investogist.com/cbn-devalues-the-official-rate-of-naira-for-the-second-time-in-2020/

It seem to be true o.... Rates on CBN site has been updated to reflect that.
https://www.cbn.gov.ng/rates/ExchRateByCurrency.asp

earthrealm:
am lazy to do the calculations, [b]really curious to know the capacity & cost of lead acid battery and Lipo4 [/b]that would be ok for this project, should the owner consider it?. anybody got the spare time for us?

Certainly a lead acid should not be on the list of batteries for such a project. LTO and Lifepo4 or any other lithium chemistry will full my list of options.

Ultimately this is a project for the pros and the recommendation of @NiyiOmoIyunade is in order. I hope he will keep us posted though (assuming it works out), just to learn about all the ingredients that finally cooked the soup.

Interesting sunny day, did over 3x of my array capacity, funny enough i didn't achieve any record instantaneous hervest but the cumulative is fantastic!
#YesToRenewable

SuleimanKano:
Good morning Engineers.

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.

Air-conditioning of a super market requiring continuous load of 600,000kva are you sure about that figure or is this what is required cumulatively from 6am to 9pm?

zeestone99:
Ojesky the man.this guy keeps falling in love with lithium. This your marriage strong o

My brother there is no turning back o....but my next upgrade should be the last for a long time before madam go vex with these my lithium expenses

ceaser:
You forgot to put the BMS voltage o.

LFP (3.2v) for 8s 24v

That's X3 your array.... that's cool. It also gives me good confirmation that my 7 to 8kwh+ yield on a 2.5kw array is not bad one for a "non premium" gear, will do a proper stress test after my bank upgrade, but men bros you dey use power o

NiyiOmoIyunade:
Finally [b]closed the day at 59KwH solar harvest and 49KwH [/b]energy consumed by appliances during the day (see pic 2 of 2).

This was a stress test passed in flying colors - I do believe the PV array is rather oversized but it gives the assurance to run large loads as if on Mains - this is key as the only backup power I have is a 5.5kva Diesel Gen - no connection to PHCN grid whatsoever - no cables or service pole near me

NiyiOmoIyunade:
Although I have the Victron and Fangpusun BMVs, I ditched local monitoring for the more robust reporting features available via a GX device.

I had to choose the Venus GX (no screen) as only that device in the Victron world had the required number of ports to connect 4 CCs, 2 inverters, smart managed battery and bring them all under smart management and BMS control. To my chagrin, Victron released the CerboGX designed to robustly connect multiple devices less than a month after I already bought a Venus GX.

The lack of a display screen motivated me to develop proprietary software to interface with GX devices, Battery & Tank level monitors, Currrent and Weather sensors and post directly to EmonCMS and other dashboard sources bypassing Node Red, SolPip... and other similar crutches that the average DIYer would use - this allows one to flexibly monitor and dashboard any and every metric of interest - if your device outputs a signal over RS232, RS485, TCP, Modbus, MQTT, DBUS, chances are high we can catch it and dashboard it for you.

The current house dashboard updates every 10 seconds - one could point it to EmonCMS local or public or PVOutput.org or a number of other sources just at the press of a button. Right now it outputs to a screen at the office and 6 phones all over Lagos. Whether I am at home or on the road, I can see a view of whatever my power system is doing as at 10secs ago - this works seamlessly regardless of location and number of connected users.

More importantly I can benchmark the various sites I maintain either via the Victron VRM portal or EmonCMS - I can spot issues and signs of trouble early.

These are the justifications for multiuser accessible remote monitoring - customer support, performance benchmarking and just basically keep updated on the status and health of your system.

When I have the chance I want to add early morning email notifications that contain that day's weather and solar insolation forecasts and yesterday's performance summaries.

I think I may have misunderstood what you meant by multiuser, thought you meant shell access to your server (in my case pi3+), my emoncms can indeed be accessed by multiple number of users home and remote. The only limitation I have for remote access is data due to using free version of data duplicity though I have never hit my daily remote peak, but I guess if I include my emoncms link on my footer for folks to take a look on live data, I will easily hit that limit daily. I also log at pvoutput and that is linked on my footer

I look forward to seeing your arsenal of gears someday, I can imagine what it looks like. We na baby DIYers for your stable o

durodee:
As I saw all the beautiful charts I thought this is biblical do you understand what you are reading?

Lol.....I built the dashboard so yes each value communicates to me, I shared it so you see the 170AH discharge at battery voltage of 25.2v

I just want to know if the battery is performing within name plate specifications and a good buy?

Certainly a good buy and meets the specification. Though I think it's sold at 500k now....if you are interested, mine will be available for sale in near future (when I get to do my planned upgrade)