₦airaland Forum

Marykhay:
Thanks Chief for pointing out that the cells are indeed balanced (negligible unbalance), meaning I have no problem with the guy’s weird configuration anymore as well as the imbalance of the system.


I use 3units of 180Watts panels. Which is 540Watts. It charges fine. No issues at all with any component of the system. However, the system doesn’t last long enough for its capacity. This is the part I don’t understand anymore.

Pointing out that I should change to an MPPT is suggesting to me that it could be that the PWM is limiting its charge to less than 3.65per cell? Meaning that it doesn’t fully charge the system?

Well, I’ll get the MPPT and see if the problem goes away or not.

The cells should get to 4.2v per cell on a 12v charger only if they're s (4 BMS wires).

4s (5 wires from BMS) means they'll share that 12v charger input which may be why it's stuck at 3.65 per cell.

Xanderone:
Not good enough

Soldering 18650s isn't even the best approach. He should invest in an inexpensive spot welder. The rechargeable one I got 4 years ago for 25k is still going strong.

He should use nickel strips or even copper strips for goodness sake.

Is there a BMS in this thing 😳? Cos that pack is a fire hazard waiting to happen. 18650s aren't so forgiving with irregular charging and thermal runways unlike their counterpart in the phosphate chemistry.

for packs less than 50pcs, back in the days, I just do a battery compactment just like we have in toys where there's spring at +ve side and flat at -ve part. BUT in my own case, I just do it all flat (-ve) for like 25pcs and all spring (I don't use spring BUT just make the flat plate pointed a bit so it's not flat) for the +ve side and then a single thick wire connects them and I've got a clean looking 25p2s pack.

If I were to use same cylinderical cells today, I wouldn't do it any different.

And for huge capacities, except you got those small cylinderical cells so cheap or at no cost, it's better going for higher capacities

I see
How about using a normal sachet inverter or those other 1kva inverter that has charger along side external charger so that when there's grid input it will bypasss.
I currently use a 1kw famicare Inverter but the charging amps is too low, I'm thinking of getting an external charger to add to it

Iinnov8:
Good question.

No, it doesn't do so as a follow-come feature. It is a budget setup afterall. But it can be made possible using a relay switch to automatically transfer your load to grid, if available.

However, if the charger is connected to a separate socket that is NOT powered by the inverter, but pulled out from the point grid or gen enters your house so that the socket/charger only comes on when there is nepa or gen light, then you can have a system that runs without your intervention to a great extent.

Your battery will immediately begin charging as soon as there is grid input, even though the inverter is on and still powering your loads. And as long as your loads doesnt exceed the amps rating of the charger, the batter will be getting charged while your loads are still being powered. You can then manually switch to nepa light at your convenience.

Majority of those "Normal Satchet inverter with inbuilt charger" are MSW. I think I've seen only one with inbuilt charger that is PSW. If you don't mind using a MSW, then it may be a choice. But if you want to protect sensitive electronic equipments then get a verified PSW inverter and a good, adequately rated external charger to go with it.

JoeSef0:
I see
How about using a normal sachet inverter or those other 1kva inverter that has charger along side external charger so that when there's grid input it will bypasss.
I currently use a 1kw famicare Inverter but the charging amps is too low, I'm thinking of getting an external charger to add to it

Xanderone:
The cells should get to 4.2v per cell on a 12v charger only if they're s (4 BMS wires).

4s (5 wires from BMS) means they'll share that 12v charger input which may be why it's stuck at 3.65 per cell.

those are lifepo4 cells not li-ion

JoeSef0:
I see
How about using a normal sachet inverter or those other 1kva inverter that has charger along side external charger so that when there's grid input it will bypasss.
I currently use a 1kw famicare Inverter but the charging amps is too low, I'm thinking of getting an external charger to add to it

see eh, there are CHARGERs that would contribute towards killing your batteries. That an inverter has inBuilt charger, doesn't mean it's good enough.

no response yet @Olumighty123

bassdow:
You didn't state if you stay at ground floor or upStairs.

how many litres is your freezer ? is it the old school type or the energy saving type or inverter models ?

The Televisions, are they flatscreen or the old school box type ?

if you are on the ground floor (downStairs), you would need approximately 25m of PV cable BUT if upStairs, then half should do.

You also didn't state your budget. If you had checked past comments, should have picked up one or 2 things from them. Myself learnt by reading and practicalizing. I no carry knowledge come this world.

no response yet @Olumighty123

Xanderone:
The cells should get to 4.2v per cell on a 12v charger only if they're s (4 BMS wires).

4s (5 wires from BMS) means they'll share that 12v charger input which may be why it's stuck at 3.65 per cell.

It’s a LifePo4 cells.
They have a nominal Voltage of 3.2V and a cutoff or full voltage of 3.65V.


Thanks.

Xanderone:
Not good enough

Soldering 18650s isn't even the best approach. He should invest in an inexpensive spot welder. The rechargeable one I got 4 years ago for 25k is still going strong.

He should use nickel strips or even copper strips for goodness sake.

Is there a BMS in this thing 😳? Cos that pack is a fire hazard waiting to happen. 18650s aren't so forgiving with irregular charging and thermal runways unlike their counterpart in the phosphate chemistry.

Lols, I don’t know why you guys are scared of the battery pack, it’s safe and not hazardous. It’s about a year plus now.

But recently I just had to do a capacity test out of curiosity. Seems the cells were salvaged by the builder cos it’s not up to capacity.

Marykhay:
Lols, I don’t know why you guys are scared of the battery pack, it’s safe and not hazardous. It’s about a year plus now.

But recently I just had to do a capacity test out of curiosity. Seems the cells were salvaged by the builder cos it’s not up to capacity.

Or maybe my PWM has been limiting the charge due to high resistance in my SCC to battery wire which I changed yesterday. The former wire was thinner and was barely giving the same wattage I’m getting with this new 6mm cable today.

But if all my testing goes well, getting an MPPT soon too, I will update the house on everything.

House what you think about eastMan charge controllers and inverters ?

Asking because a neigbour asked me same

Good afternoon

Please,where can I get original 450W solar panels around atan-ota in ogun state...I want to increase my solar panels and I can't find 450W panels around?

Marykhay:
Lols, I don’t know why you guys are scared of the battery pack, it’s safe and not hazardous. It’s about a year plus now.

But recently I just had to do a capacity test out of curiosity. Seems the cells were salvaged by the builder cos it’s not up to capacity.

In the heydays, twice I had fire outbreaks with 18650s. Not at life threatening level though. But scary enough to prompt me to capacity-test every cell (time consuming) isolate & remove warm cells, stop using solders and wires for any 18650 projects but instead use nickel or copper strips and spot welder no matter how small the pack is.

Li-ion fires are annoyingly persistent, class 4 fires irresponsive to fire extinguishers. The only thing you can do is to isolate that burning pack from other inflammable materials, take it far away and watch it burn itself out.

I know this fire hazard is almost non-existent with LFP, but easy to abuse nonetheless.

Bankyshinani:
Please,where can I get original 450W solar panels around atan-ota in ogun state...I want to increase my solar panels and I can't find 450W panels around?

I staw around there myself

I could help you or kukuma go Alaba market

Thazard:
I don't have a power source to charge it

It charges with solar too.

...

Please I need help who has used inverter compressor to build ice block machine

capnies:
Please I need help who has used inverter compressor to build ice block machine

why not get in touch in that line of business.

3 projects I have handled, the owners used AirConditioner compressor. Mind you, I didn't do the building; just handled the Solar setUp side

Xanderone:
In the heydays, twice I had fire outbreaks with 18650s. Not at life threatening level though. But scary enough to prompt me to capacity-test every cell (time consuming) isolate & remove warm cells, stop using solders and wires for any 18650 projects but instead use nickel or copper strips and spot welder no matter how small the pack is.

Li-ion fires are annoyingly persistent, class 4 fires irresponsive to fire extinguishers. The only thing you can do is to isolate that burning pack from other inflammable materials, take it far away and watch it burn itself out.

I know this fire hazard is almost non-existent with LFP, but easy to abuse nonetheless.

The fact that you had a fire case doesn't mean everyone will. Do not generalize a case because you experienced it twice. It Is like telling someone to avoid driving a Nissan car on Sundays because you had accidents twice every Sundays.

Iinnov8:
They are actually Lithium batteries (LiFePO4) made with Grade A cells. See datasheet attached. A capacity test has been done on them, see links below, and we will be conducting a live strip down test on them soon.

And yes, it can power your house. You either get an inverter, AC charger and solar charge controller (as seen in first picture below), all of which i can provide, or get an Hybrid (all-in-one) inverter. I have a Haisic 1.5kva available for 190k. See picture below

a hybrid (all-in-1) inverter (


https://www.youtube.com/watch?v=a5CvmSrK068?si=tX68JDRFzEIFGu1O


https://www.youtube.com/watch?v=hsjQ_1-s6Zc?si=X16VxgFgFKslpA7W

Pls can I get a model description of this capacity tester?

And how much is it?

dollarnaira:
The fact that you had a fire case doesn't mean everyone will. Do not generalize a case because you experienced it twice. It Is like telling someone to avoid driving a Nissan car on Sundays because you had accidents twice every Sundays.

Wahala for who dey drive Nissan Car on Sundays 😭.

Iinnov8:
They are actually Lithium batteries (LiFePO4) made with Grade A cells. See datasheet attached. A capacity test has been done on them, see links below, and we will be conducting a live strip down test on them soon.

And yes, it can power your house. You either get an inverter, AC charger and solar charge controller (as seen in first picture below), all of which i can provide, or get an Hybrid (all-in-one) inverter. I have a Haisic 1.5kva available for 190k. See picture below

a hybrid (all-in-1) inverter (


https://www.youtube.com/watch?v=a5CvmSrK068?si=tX68JDRFzEIFGu1O


https://www.youtube.com/watch?v=hsjQ_1-s6Zc?si=X16VxgFgFKslpA7W

This is what I mean. What’s the model and how much is it?

bassdow:
why not get in touch in that line of business.

3 projects I have handled, the owners used AirConditioner compressor. Mind you, I didn't do the building; just handled the Solar setUp side

Thank you

The building first

I want ideas on how it should be built

JoeSef0:
With this sachet inverter with battery charger, will thr inverter still bypass when there's grid input?

you buy Peugeot you dey ask if e get panoramic roof

Never seen a Peugeot with a pano roof? you're stock in the past Mr

Gshems:
you buy Peugeot you dey ask if e get panoramic roof

JoeSef0:
Never seen a Peugeot with a pano roof? you're stock in the past Mr

no vex. If you no understand the joke. My bad( in Mr shaggi's voice)

dollarnaira:
The fact that you had a fire case doesn't mean everyone will. Do not generalize a case because you experienced it twice. It Is like telling someone to avoid driving a Nissan car on Sundays because you had accidents twice every Sundays.

E be like una never see where this lithium cells Dey bring full building down. People that are still trying to build large packs with this cylindrical cells my advise is just buy prismatic cells they are cheap now

iraybuju:
E be like una never see where this lithium cells Dey bring full building down. People that are still trying to build large packs with this cylindrical cells my advise is just buy prismatic cells they are cheap now

Some people build packs with mismatched harvested cells while some build with branded matched cells e.g Samsung.

Some make use of wrong chargers while some make use of dedicated chargers of 12.6v.

Gshems:
Please can anyone kink me up with any vendor that sells solar panel mount in Agege and environs

Go to Arena Shopping Complex, @Oshodi, it is one bus, 10 minutes from Agege.

capnies:
Thank you

The building first

I want ideas on how it should be built

well that might not be my field BUT the concept is basically you need a casing like a used Freezer or upRight (standing) fridge which a fridge / freezer specialist would have recoiled enough to have those coils in the right places, then use the outDoor unit of an AirConditioner. The capacity of the AC is often from 3HP and above.

once again, those people who rePair fridges / freezers, or those who sells the parts, or sells fridges, should point you towards thoose who offer such services. e no really hard. You need just ask around.

Could share contacts with you BUT tomorrow if disAppointment happen, you go wan hold me accountable so do your search yourself.

even God no longer finds wife for we Men, He lets us do the finding ourselves so tomorrow if yawa start, we no go blame am like Adam did after eating that Apple.

iraybuju:
E be like una never see where this lithium cells Dey bring full building down. People that are still trying to build large packs with this cylindrical cells my advise is just buy prismatic cells they are cheap now

there's a reason they ain't allowed on airPlanes.

the only lithium battery related fire I've seen is the one I intentionally cause myself. I threw a single cell into a burning fire just to see the outcome, compared with other battery chemistry.

me be that kind person wey fit enter a well secured superMarket, try theif something as little as chewing gum just to see if I could get past their (sophisticated) security system.

funny enough, even some phone's battery bank is enough to bring down a building. The more reason batteries lithium or not shouldn't be used or placed carelessly. A single near spent cigarette can do same if the opportunity arises.

tziz:
Guys, what are the odds of a roof leak after solar panels installation and has anyone here experienced that?

It all depends on how "Professional and Experienced' the Installer is, in doing Roof Jobs.
I used one called @Zeestone99 / MAZINE Energy / MAZINE GROUP and everywhere on my Roof was leaking after the installation

Read about it here and decide for yourself.
https://www.nairaland.com/390522/solar-energy-complement-fta/1211
https://www.nairaland.com/390522/solar-energy-complement-fta/1207#114911187

There is a guy here with the username called @Olopan, he does excellent Roof Installation