NewStats: 3,263,832 , 8,181,557 topics. Date: Sunday, 08 June 2025 at 08:06 AM 416b48

Obnoxious2001:


My oga 🙌🏾🙌🏾🙌🏾.

Make I come learn work.
Which side you base?

I sent you message on WhatsApp some months back.

Yes bro I recall.. Based in Lagos, na chance be the main problem.

dollarnaira:


On a serious note, is there a major difference between buck converter and pwm?

Both are pulse( pwm- pulse width modulation) in nature. They both push in current for some seconds and stop. The process continues again....

Wow! So good you understand that they push current for some fraction of seconds and stop, it will make the explanation easier!

Now lets look it this way, picture both a pwm controller and a buck converter having 4 terminals, 2 input from the solar , 2 outputs to the battery. Assuming that all negative terminals are connected together (this is not usually the case but for simplicity sake), and for the positive termins, connected as such:

Case Pwm controller:
Positive from , to electronic switch (FET or likes) then to positive battery terminal.
When switch is closed, it pushes current to battery for some fraction of a second and current stops to flow immediately the switch is open, then repeat s for the next cycle.
So in this case we have a 'current is flowing and a current stops flowing' for each cycle (mind you we could have tens of thousands of such cycles in a sec)

Case Buck Converter:
Positive from , to electronic switch (FET or likes) then to an inductor, then capacitor, finally the positive battery terminal.
When switch is closed, current flows from the through the switch, the trough the inductor before finally arriving at the battery (which is in parallel with the capacitor), but when the switch is now open ehh, you see that high voltage gap you always crave for when you're selecting an mppt controller, together with the current the was previously flowing when the switch was closed, would have caused a corresponding amount of energy to be stored in the inductor within that time, which will now be released to the battery now that the switch is open..

So in this case, you close switch, battery dey charge, inductor too dey charge (from excess voltage) , then switch open, inductor start to the dey discharge itself inside the battery, at every point in time, current dey flow enter the battery.. you get the point now?

Without the excess voltage, your MPPT/buck is as good as a pwm controller or even worse as there must be losses through the inductor, some MPPT will by this inductor in such case.

Regards.

Juror:
Here's the spot welder 99 Gears 8V-24V Spot Welder Kit Digital Power Adjustable Spot Welding Pen Control Board Nickel Sheet For 18650 Lithium Battery

a.aliexpress.com/_mL8LBGu

Is this still available?

Queed:


Wow! So good you understand that they push current for some fraction of seconds and stop, it will make the explanation easier!

Now lets look it this way, picture both a pwm controller and a buck converter having 4 terminals, 2 input from the solar , 2 outputs to the battery. Assuming that all negative terminals are connected together (this is not usually the case but for simplicity sake), and for the positive termins, connected as such:

Case Pwm controller:
Positive from , to electronic switch (FET or likes) then to positive battery terminal.
When switch is closed, it pushes current to battery for some fraction of a second and current stops to flow immediately the switch is open, then repeat s for the next cycle.
So in this case we have a 'current is flowing and a current stops flowing' for each cycle (mind you we could have tens of thousands of such cycles in a sec)

Case Buck Converter:
Positive from , to electronic switch (FET or likes) then to an inductor, then capacitor, finally the positive battery terminal.
When switch is closed, current flows from the through the switch, the trough the inductor before finally arriving at the battery (which is in parallel with the capacitor), but when the switch is now open ehh, you see that high voltage gap you always crave for when you're selecting an mppt controller, together with the current the was previously flowing when the switch was closed, would have caused a corresponding amount of energy to be stored in the inductor within that time, which will now be released to the battery now that the switch is open..

Thought as much.
Close open open close.
Thanks for the detailed explanation.
Thanks plenty.

Queed:


Yes bro I recall.. Based in Lagos, na chance be the main problem.

No wahala.
We dey together.

Just recommend/drop reference of books/YouTube person fit use follow up for the embedded life

dollarnaira:


I get you but am talking about how they push in current.

Can you explain further

Obnoxious2001:


Can you explain further

The other guy don answer am

Someone should recommend me a pocket friendly 3kw 24v inverter that's lithium compatible.

officialfestus:
Someone should recommend me a pocket friendly 3kw 24v inverter that's lithium compatible.

Lithium ion or LifePO4?

Queed:


Very possible, in fact I have built many of such system.. It a matter of writing code that will searching for that sweet spot and hanging around there for a while.

Yeah, that's one way. Mine was more brute force like. So I noticed that if you have a PV connected to a buck converter or smps, it finds the MPP and gets stuck there, if there is a change in irradiance and you disconnect and reconnect the PV, it automatically jumps to the new MPP. So that means if you have a steady switching period you can always find the MPP without much codes or circuitry.

Did some reading and saw one method of hunting MPP is perturbation which I think s my observation.

I don buy some mosfets and a timer to test it out, but no time to play. 😂

I'm still learning sha.

tetralogyfallot:
u can order them sir, they are super rugged!

Nice. You sell? Or show me where I can get even if it's used ones.

Queed:


Wow! So good you understand that they push current for some fraction of seconds and stop, it will make the explanation easier!

Now lets look it this way, picture both a pwm controller and a buck converter having 4 terminals, 2 input from the solar , 2 outputs to the battery. Assuming that all negative terminals are connected together (this is not usually the case but for simplicity sake), and for the positive termins, connected as such:

Case Pwm controller:
Positive from , to electronic switch (FET or likes) then to positive battery terminal.
When switch is closed, it pushes current to battery for some fraction of a second and current stops to flow immediately the switch is open, then repeat s for the next cycle.
So in this case we have a 'current is flowing and a current stops flowing' for each cycle (mind you we could have tens of thousands of such cycles in a sec)

Case Buck Converter:
Positive from , to electronic switch (FET or likes) then to an inductor, then capacitor, finally the positive battery terminal.
When switch is closed, current flows from the through the switch, the trough the inductor before finally arriving at the battery (which is in parallel with the capacitor), but when the switch is now open ehh, you see that high voltage gap you always crave for when you're selecting an mppt controller, together with the current the was previously flowing when the switch was closed, would have caused a corresponding amount of energy to be stored in the inductor within that time, which will now be released to the battery now that the switch is open..

So in this case, you close switch, battery dey charge, inductor too dey charge (from excess voltage) , then switch open, inductor start to the dey discharge itself inside the battery, at every point in time, current dey flow enter the battery.. you get the point now?

Without the excess voltage, your MPPT/buck is as good as a pwm controller or even worse as there must be losses through the inductor, some MPPT will by this inductor in such case.

Regards.

Explained it perfectly. Abeg, I wan come learn work o. 😊

dollarnaira:


Lithium ion or LifePO4?

lithium ion.

Trippledots:


Nice. You sell? Or show me where I can get even if it's used ones.

I sell

tetralogyfallot:
I sell

How much?

Trippledots:


How much?

chat me bro 08034694579

Mtn lumos samsung 18650 cells are available for sale

Chat me on whatsapp 08034694579

Good morning brothers Please which inverter can handle a laundry shop with
1 12kg lg washing machine 390w washing 135w spinning and 15w water running total 550w plus electric iron 1100w and ceiling fan 80w
All used at once for 8hrs a day

capnies:
Good morning brothers Please which inverter can handle a laundry shop with
1 12kg lg washing machine 390w washing 135w spinning and 15w water running total 550w plus electric iron 1100w and ceiling fan 80w
All used at once for 8hrs a day

big stuff, u go spend money o

capnies:
Good morning brothers Please which inverter can handle a laundry shop with
1 12kg lg washing machine 390w washing 135w spinning and 15w water running total 550w plus electric iron 1100w and ceiling fan 80w
All used at once for 8hrs a day

if money no be problem you go need
5 KVA inverter
5 KW lithium battery
3 KW solar s

capnies:
Good morning brothers Please which inverter can handle a laundry shop with
1 12kg lg washing machine 390w washing 135w spinning and 15w water running total 550w plus electric iron 1100w and ceiling fan 80w
All used at once for 8hrs a day

24v 4.2kw hybrid inverter 400k
24v 7.1kwh lifepo4 lithium battery 1.350m
6pcs of 450w s

Between getting an easun inverter of 24v 5000w peak and 2500w continous power and getting a 24v 3kw hybrid inverter, which one is better?

Note, I have a charge controller, automatic change over, but planning on getting a charger for my pack.
Cc valto, penuelseun, dollarnaira.

officialfestus:
It was worthy every Penny as it can go as low as 9.4volt, with a load of 90w.

Good evening boss, abeg these your inverter, how much you buy am?

ksmart027:

Good evening boss, abeg these your inverter, how much you buy am?

80k.

officialfestus:
Between getting an easun inverter of 24v 5000w peak and 2500w continous power and getting a 24v 3kw hybrid inverter, which one is better?

Note, I have a charge controller, automatic change over, but planning on getting a charger for my pack.
Cc valto, penuelseun, dollarnaira.

a lot of factors come into play, the hybrid inverter is an all in one system i.e it comes with inbuilt inverter, charge controller, mains charger and automatic change over while the standalone inverter is only an inverter that you need to get all the other components for. The hybrid is easily customizable and requires fewer wires but has a higher idle self consumption over the standalone. It is also like putting all your eggs in one basket as it anything happens to one of the components, the inverter may shut down totally

The standalone is not customizable as far as I know, but you are somehow safe from lightning strikes as it is not connected to the grid or solar s. It also runs much more quieter than the hybrid and more efficient too. Other factors come into play but I will choose the standalone over same capacity hybrid always

Penuelseun:
The standalone is not customizable as far as I know, but you are somehow safe from lightning strikes as it is not connected to the grid or solar s. It also runs much more quieter than the hybrid and more efficient too. Other factors come into play but I will choose the standalone over same capacity hybrid always

good morning sir, thank you for your contribution.

ksmart027:

Good evening boss, abeg these your inverter, how much you buy am?

I have one for sale,if you're interested 12v 2000w

officialfestus:
Between getting an easun inverter of 24v 5000w peak and 2500w continous power and getting a 24v 3kw hybrid inverter, which one is better?

Note, I have a charge controller, automatic change over, but planning on getting a charger for my pack.
Cc valto, penuelseun, dollarnaira.

PenuelSeun has highlighted good points and advantages hybrids inverter systems have over a modular/standalone system.

But my major concern is how stranded you will be if the hybrid inverter ever needs to be taken out for repairs if there is an issue. You will basically be taking out 3 major components (inverter, charger and controller) from your system and it may be difficult for you to get a stop-gap/temporary solutions for all 3 components, so you will have to wait till the hybrid inverter is fixed and returned to you.

This is unlike standalone system where you can just take out the defective unit and replace with a working one.

Hybrid inverter is a progressive technology, but ensure you have backup plans when using them because no system is fail-proof and periods of downtimes will definitely come

odimbannamdi:


PenuelSeun has highlighted good points and advantages hybrids inverter systems have over a modular/standalone system.

But my major concern is how stranded you will be if the hybrid inverter ever needs to be taken out for repairs if there is an issue. You will basically be taking out 3 major components (inverter, charger and controller) from your system and it may be difficult for you to get a stop-gap/temporary solutions for all 3 components, so you will have to wait till the hybrid inverter is fixed and returned to you.

This is unlike standalone system where you can just take out the defective unit and replace with a working one.

Hybrid inverter is a progressive technology, but ensure you have backup plans when using them because no system is fail-proof and periods of downtimes will definitely come

Thanks boss.

Good morning bosses.
Please I need a diy process on how to build a 24v 7s lithium ion battery charger, as getting the already made is too costly.
Cc penuelseun, valto, dollarnaira, ewizard1