₦airaland Forum

mctfopt:
Is the battery brand new or used?

It is brand new in mint condition

Yea, it is not a regular Chinese knock-off. It is premium quality; good enough to power Japanese Robots. It is normal practice to repurpose Lithium batteries for uses other than the original design especially when the battery is of very good quality.

What is important is the quality, durability and safety of the battery. The Sharp Stobe battery is of premium quality having been originally made to power robots. It is very durable with extended cycle life and also delivers the rated power. The chemistry is also very safe since it does not burst into flames when abused.

Since the specifications, quality, longevity and safety exceeds those of many other Lithium batteries in use today, there is therefore nothing for buyer's to beware of.

adrusa:
Buyers' beware. Not a regular lithium setup. Clearly not for anyone starting a lithium journey. Looks like a custom setup made for a japanese robot. Look very well before you take the plunge.
https://jspower.en.taiwantrade.com/product/battery-for-assist-robot-670510.html#
https://forum.esk8.news/t/battery-clearing-house-sv-ba10-13s-20ah-battery/22100/249

Sharp Stoba EA-BA1000

Premium Lithium Battery at the price of AGM/GEL/Flooded

1Kwh, 48.1v nominal, 20.6Ah Lithium Ion Battery with Sharp Stoba addictive

Extended Cycle life. Increase Capacity. Enhance Safety. Reduce Cost. High Quality BMS inbuilt

Experience Lithium technology without breaking the bank

N135,000.00

Contact: 080 five five 35 six 495

You cannot only discharge LTO batteries to 100% DoD routinely without any damage, you can also discharge them to 0v without dire consequences. Some of my cell actually arrived at 0v sealed in a packet from the manufacturer. They were in storage for 10years before I bought them.

LTO batteries simply don't burst into flames no matter the abuse. It is the safest Lithium chemistry available today. It is superior to LFP.

I concur with Niyi that it is poor design to max out your battery capacity and rely on BMS to cutoff. I did 100% DOD a few times just to verify the true capacity of the batteries and they over performed on every occasion.

When many people do the Lithium Vs Lead Acid comparison, they leave out so many important factors. Coulombic Efficiency is one such factor.
Most Lithium batteries have Coulombic efficiency greater than 99% while that of Lead acid is about 85%. This implies that every time you cycle your lead acid battery, 15% of the energy is lost to battery inefficiency as against 1% loss in Lithium. This is real energy you could have used to power your home wasted by Pb batteries.

Another important factor is the charge C rate. Most lead acid batteries are rated at C10 or less. Lithium on the other hand can do 1C or higher. This become very important in Solar applications because of the limited sun hours available daily. You can easily over size your array to fully recharge the Lithium batteries in 1-2 hours. Try this with lead acid batteries and watch your battery become a heater.

You can also benefit from the high charge rate of Lithium batteries even if you rely on PHCN to recharge your battery. With adequate fast charger, you can easily recharge your Lithium battery within 1-2hours window when PHCN is available in your area. No need to run expensive generator.

Today's Lead Acid vs Lithium debate is similar to the Carburetor vs Injector and Automatic vs Manual transmission debate of late '80s and early '90.
The new vs the old. The old had never won and it will not in this instance also.

When people talk about the Lithium hype, I smile. It is not a hype; it is real! You need to experience Lithium to appreciate it. Some of the die hard Lead acid fans on this platform that eventually took the Lithium plunge can attest to this.

Ignore Lithium at your detriment.

NiyiOmoIyunade:
Boss you quoted me say 'In most systems 100% DoD is not feasible' na. Surely there are exceptions.

Oga Dapsyra's cells look more like specialized, industrial grade product that you would see in aerospace or similar applications not a general comsumer battery

Even so, I am not sure he does 100% DoD on routine basis, it is simply poor design to max out your battery and let the BMS cutoff - the elegant way is to let the inverter neatly disconnect AC output at the preset LVD point and neatly resume AC supply once some charge has made it into the battery

This issue is usually caused by mismatched total resistance (battery internal resistance plus wire resistance) of each respective bank. The higher resistance bank will lag behind. That is why is it best practice to use wires same gauge and length when connecting batteries in parallel. It is also advisable to use busbar if you must parallel more than two banks.

adrusa:
@ Ojeysky and others.

This is the point I was making about battery banks in parallels. Each of the battery behaves as if it is the only battery in the bank for charging and discharging. As you can see from this picture, one of my batteries is a laggard for reasons I'm yet to understand. It charges and discharges slowly relative to the other two. But once the other two complete their charging, the laggard in the middle start charging at a faster rate while the other ones are either at 0 or very low rate.

Contact

futurenix:
Just 1 unit each remaining


3.2KW (pf=1) ,24V with 4000W PV,80A MPPT for 170K

3.5KW (pf=1) 24V with 5000W PV, 100A MPPT for 200K

5KW (pf=1) ,48V with 5000W PV, 80A MPPT for 250K

5.5KW (pf=1), 48V with 6000W PV, 100A MPPT 270K.


*All with the wifi device included for monitoring with app available on Google playstore.

*Can operate without battery

*Can be used with Lithium battery (Battery bank must have BMS)

*Input PV of 120 to 450V (500Vdc Max)

*Programmable Battery equalization function

*Programmable low DC cut off voltage

*Can take surge upto twice its rated value (6400VA for 3.2KW,7000VA for 3.5KW, 11,000VA for 5.5KW) for 5 seconds

*Configurable AC/Solar Charger priority

*Configurable battery charging current

*Replaceable and available MPPT and main boards (on request)

Contact me for more info.

My body needs cash now

futurenix:
That's the nameplate on the 5.5KW

Impressive

futurenix:
I have this hybrid inverter for those who are interested. 3.2KW, 3.5KW, 5KW and 5.5KW. All have power factor of 1, wifi device and can operate without battery.

Currently connected one and I am using it.

Boards are readily available ( both MPPT and main board)

Can you please show the nameplate specifications and datasheet?

funshyboi:
Good day guys. I need a LiFePo4 battery that I can charge with electricity instead of solar panel. Who sells here

You can charge all batteries from any power source, be it Solar, Windmill, PHCN or Generator provided you have the right charger.

12v, 24v and 48v ESS LiFePO4 Power Tank Batteries on sale

These are automobile grade LiFePo4 batteries built like a tank. Comes in 24v modules but can be easily configured for 12v, 36v and 48v or higher.

3C continuous charge and 5C continuous discharge. Sold with appropriately rated Ant BMS with bluetooth monitoring.

Each module of 8S4P is rated at 25.6v 160Ah for 4096Wh

Price: N705,000.00 per module

Contact: 080 five five 3 five 64 nine 5

I have some LiFePo4 batteries coming in this week.

earthrealm:
So i have a bunch of questions.

1. Lg and haier T, which of their inverter ac is beta .. i hv 1hp lg happy with ots chilling, however the consption jumped to 670w in gen mode and upto 950w normal mode after the compressor failed and was replaced under warranty

2. Any 12v inverter with battery selector switch, or editable charge voltage setting?

3. Any lifepo4 seller inhouse, no time to import. Am looking at 300ah 48v. Performance of my fla has reduced drastically. Planning an upgrade

4. Lowest price standing fan, dont care if its not rechargeable.

Israelicc:
As much as I like your analysis Sir, I beg to differ on the installation part. In practice, this 810w panel will reduce the time it takes to do an install. It will also reduce the number of mid and end clamps needed for an install. You are right with the handling part for dangerous terrains but if best and safe practice using harnesses or a MEWP is used, then there is no need to worry.

Let's also not forget that it's advancements like this that have generally brought down the cost of solar panels world wide. Imagine for once that we still had only the 100w and 150w panels, you would have needed a truck load of panels to do installs in excess of 5kwp.

I haven't seen the name plate yet but I also presume that the Voc and Imp of the 810w would be significantly higher than the 380w panels, which give us new design possibilities too. I'm just saying..

The jump from 100/150w panel to 300/380w panel was a technological leap (improved efficiency) which is not the case with the 810w panel. The manufacturer of the 810w panel merely fused two 380/400w panels into one large panel with equivalent increase in surface area and weight.

If the 810w panel is wired for higher voltage, the VOC will be about double that of 380w panel while the ISC remain same

If wired for higher current, the ISC will be about double that of 380w panel while the VOC remain same.

Both scenarios can be easily achieved by installing two 400w panels instead of the 810w panel

ceaser:
Will this require BMS or is BMS already installed in the pack?

BMS is required. They are bare cells. You have to build them into a pack according to your need.

EMMAACHILE:
Solar Module manufacturer JA Solar unveiled what is thus far the world’s biggest and most powerful panel with an 810 W model. Called Jumbo, the panel has quadruple layouts of 47 cells and dimensions of 2,220 by 1,757mm. This panel utilizes a triple-cut cell design with 11 busbars on 210mm wafers. JA puts the maximum power output at 800 W. The module is not yet in mass production.

JA Solar launched a new 525 W+ panel in May.

At first glance, it look spectacular but when you do the maths, it reduces to ordinary.

This 810w panel has dimensions 2.22m by 1.757m. This gives an area of 3.9m2

Now lets look at regular 380w panel. The dimensions are usually about 1.956m by 0.992m. This implies a surface area of 1.84m2

If will now scale up the 380w panel proportionally to produce 810w, the surface area will also scale up to 3.92m2 (1.84m2 x 810w/380w)

Summary (note all the bold figures)

The new 810w panel requires an area of 3.9m2 to install
If scaled up to deliver 810w, the old 380w will require 3.92m2 to install.

Since the area requirements of both panels are just the same, the new panel is just the old panel in a bigger frame. Nothing new on the technological side. Now that the physical size of the new 810w panel is over twice that of the 380w panel, handling becomes an issue especially when installing on difficult terrains. Excerpt the new 810w panel is cheaper than two 380w panel, I will not recommend buying it.

Abigai:
How many pieces will give a 24v setup. Gud morning.

7pcs in series is ideal for 24v setup

SPIM08HP LITHIUM ION 3.7V 8AH CELLS FOR SALE @ N3,600/cell

I have some leftover cells for sale. These cells are rather very powerful. They are rated at 25C discharge and 10C charge rates.

If you are a DIY enthusiast and you want to play with Lithium batteries without breaking the bank, these cells are for you.

CHECK OUT THE SPECS BELOW.

Material Li-ion
Typical capacity 8AH
Nominal Voltage 3.7V
Weight around 300g
Dimensions of cell body: 9x138X190mm
Dimensions of cell with tabs 9x138X210mm
Internal Resistance ≤0.8mΩ
Max Charge Rate 120A
Recommend Continuous Discharge Rate 200A
Pulse Discharge Rate（3 seconds） 400A
Fully Charged voltage 4.2V
Discharge cut off voltage 2.5V
Working Charge Temp 0~50°C
Working Discharge Temp –20°C~50°C
Storage Temperature –20°C~50°C

Applications
e-bikes, powerwalls, car audio, golf
carts, forklifts, UPS, solar system, etc.

Cycle life
2000 cycles to 80% with 100% DOD
under normal temperature

Advantages
safety, environment-friendly, high
discharge current, low capacity loss,
super-long cycle life.

There are a lot of videos on YouTube about them .... https://youtu.be/Gw9f68gN_s4

Contact: o8o five five 35 six four 9 five

futurenix:
I think there's a typo error on the efficiency, it's supposed to be 18.5%.

I can count 6 cells on the width and 11 on the length not including the one not visible so its obviously a 72 cell of 5W each

Moreover, I am not sure there is a 320W with that lower efficiency considering the panel size and Irradiance while calculating.

Most 280W panels have above 16.5% not to mention a 320W then the 360W.

Are you suggesting that the manufacturer of the panel does not know the correct efficiency wafers they used?

Or

The forger of the nameplate copied wrong data from somewhere else?

earthrealm:
Meanwhile, trying to advice a pal.
He is torn btw 8 units of 12v 200ah quanta amaron and 8 units 6v 400ah thundervolt agm battery.

The thundervolts are rated @ 20hr, while quanta is @ 10hr. So apparently quanta is better, its just the 2s2p vs 1s1p connection and the better battery we are a lil confused about.
Price wise thundervolt is a lil cheaper

Both configurations have about 19,200Wh of stored energy.

Please advice your pal to spend a little more money and buy Lithium battery of about 12,000wh (60% of the AGM capacity). He will get more usable energy, it will perform much better and also outlive the AGMs.

justcallmenuel:
360w Gpower solar panel available, #45,000. Call/WhatsApp us on 08168986461

A very simple calculation based on the nameplate data reveals that the panel is actually 320w instead of the 360w written on it.

From the nameplate:

The surface area of the panel is 1.956m x 0.992m = 1.940352m2

The panel efficiency is 16.5%

Irradiance standard test condition is 1000w/m2

From these data, we can calculate the true capacity of the panel.
capacity (w) = area x efficiency x irradiance /100
capacity = 1.940352 x 16.5 x 1000 /100=320w

So, this is clearly a 320w panel being sold as 360w

essegis:
You took 2 packs and continued the series connection from the 1st to the 2nd pack while also removing the last 2 modules from the 2nd pack then. Abi you just removed everything and arranged to suit your purpose.

I love this DIY stuff.

The 20Ah cells were used "as is". Just connect 2 packs in series and charge to 60v

The 55Ah cell came bare. This are the ones we built into several banks of 22s and also charge to 60v

The 20Ah banks and the 55Ah banks were all connected in parallel to a busbar

ceaser:
Most 24v inverter tops at 30 volts at which the inverter overvoltage protection kicks in. How would one use it with that kind of inverter and maximise the capacity that the pack has to offer?

About 90% of the battery capacity is between 2.1v and 2.5v. At 30v, the battery is 90% full

essegis:
How were you able to convert these to a 48v system?

I will still be on the look out for the 55AH modules. If I get them I will share them here too.

We arranged the cells into 22S to achieve 52.8v nominal

ceaser:
They LTO?
What's the specs of each module (voltage, total capacity)?

Volunteer your contact details bro.

Each module consist of 24pcs of 2.3v 20AH cells arranged in 2 rows of 12 cells each.
1.1Kwh total, 550wh each section of 12 cells.

Voltage ranges for each row of 12 cells.
32.4V Maximum
27.6V Nominal
18V Minimum

Both rows can be wired in series for 20AH, 55.2V nominal
OR
Wired in parallel for 40AH, 27.6V nominal

o8o five five 35 six four 9 five

essegis:
Do you mean these ones?
https://www.ebay.com/itm/Lot-of-18-LTO-Titanate-Li-ion-20Ah-1-1kWh-24cell-SCiB-cells/223465807026?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D26f6ca9f961f4a0b874e1aec4c369998%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dnone%26sd%3D202844717477%26itm%3D223465807026%26pmt%3D1%26noa%3D1%26pg%3D2380057%26brand%3DToshiba&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2b5b5261-cbdc-11ea-bded-923538c86e63%7Cparentrq%3A74fe8fdb1730a4d6b160cb43fff28418%7Ciid%3A1

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.

Trippledots:
Idea of price sir? And shop link.

I have no idea what the current price is. They are not regular stock.

We purchase them over three years ago when prices of Lithium batteries was not as affordable as it is today though we struck a very good deal because of the volume purchased.

Trippledots:
Chai... Na wa. Naija!

On another note, Will Prowse did a capacity test on these things and found the cylindrical ones to no have true capacity unlike the prismatic ones you got. And he said round-trip efficiency is about 85-90%. How were you able to achieve 99% efficiency with yours?

The ones Will Prowse tested are Chinese knock-offs. Mine were made in Japan by Toshiba for Honda. They were built to the highest international standards.

mctfopt:
Those pouch packs some punch in terms of discharge rates. How has the experience been so far?

They sure do. Standard charge/discharge rate is 10C with bursts over 50C

I cannot comment on their performance under extreme charge/discharge rates since I have not been able to load them beyond 0.14C. My experience with them has been nothing but pleasant. They have lived up to their reputations

ojeysky:
Oh this is even massive than I thought (think I saw 300AH in one of your post). You made my point about C rates, what's the essence of a high C rate then.... paying for high C rate in such scenario will be unnecessary

High C rates are very useful in automobile and grid stability applications. It is of no use in home solar storage. I did not buy LTO for it's high C rate. I bought it for it's very long cycle life and abuse tolerance.

NiyiOmoIyunade:
Cost to capacity ratio was one of the biggest hurdles to me going Lithium. People could not understand why I felt I needed a 48v 800Ah Lithium bank - whenever I told friends and professionals that my measured overnight consumption could be up to 15kwh they would say impossible. And this was not counting evening use o.

See below graphic at 11:25pm.

41kwh consumed before midnight on a day that solar generated 47kwh. 35% of 40kwh battery already consumed as well.

Your battery bank should be designed for your need not what someone else think.

I am 100% off-grid and my system is designed to meet my needs with enough redundancy to cater for 2 days of bad weather.

essegis:
Yeah, I went searching last night after the post and saw the cycle efficiency default. Abeg that one no be big issue joo. Over size the bank if that's the case. Is it working? E dey bring light? E no dey die? Na wetin we dey find be that.

Enjoy bro, you've given me something to think about again and I love it.

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

essegis:
Hmmmm.

I really didn't consider LTO when setting up my systems. With this your write its something to look up and possibly consider in the nearest future. Though in my research into Lithium I no see them praising it the way you praised unending here oo. But who am I?

Anyway, enjoy your batteries abeg.

One man's food is another man's poison.

All the "PRO" points I listed cannot be faulted in any objective review. The only complaint I have seen about them that I did not list in my "CONs" list is the claim that their cycle efficiency is lower that other Lithium flavours. My personal experience with LTO is contrary to that claim maybe because I am not running them at 10C.

For home solar storage, nobody need 10C. At 10C, the battery bank will be depleted in 6minutes! That will be a very poor design

NiyiOmoIyunade:
20,000 cycles!!! I am green with envy

Makes PylonTech look like a joke - I remember our back end conversations back then around the Tesla PowerWall - it was you that convinced me this Lithium thingy was viable in a residential use case.

I was lucky to get a few Lithium installs under my belt shortly after and no looking back since that time.

One day when I grow up, I will be able to afford a premium LTO bank. Hopefully, I will still have a few internal organs left to sell in exchange.

My Oga Dapsyra, well done!

Niyi, those PylonTech batteries are quite good. I took a brief look at them back then before settling for the LTO cells. I had a client that ordered large quantity of LTO cells (>120kwh). I seized the opportunity of the bulk purchase to grab some cells for myself at a very affordable price.