MPPT Solar Charger Prototype | 12V Lead-Acid Battery | Bulk Absorption Float

[@OstrowskiMariusz]

This is the battery charging controller only. For MPPT you need to implement additional algorithm, for example the constant voltage or perturb and observe method. However this is good base for start. Good job.

[@BenMitro]

Looking forward to the MPPT control where the peak power point is continuously tracked. Thanks for a great video.

[@melvinatlas8753]

you probably dont give a shit but does someone know of a method to log back into an Instagram account? I was dumb lost the login password. I would love any assistance you can give me!

[@leonelquinn9106]

@Melvin Atlas Instablaster ;)

[@melvinatlas8753]

@Leonel Quinn thanks so much for your reply. I found the site on google and Im waiting for the hacking stuff now. Seems to take a while so I will get back to you later when my account password hopefully is recovered.

[@melvinatlas8753]

@Leonel Quinn It did the trick and I now got access to my account again. I'm so happy:D Thank you so much you really help me out !

[@leonelquinn9106]

@Melvin Atlas Glad I could help xD

[@WereCatf]

This is not an MPPT-charger, it's just a lead-acid battery charger. MPPT specifically refers to extracting maximum power from the solar-panel; it keeps track of the voltage and current of the panel and adjusts the current so that the panel is always supplying as much power as it can. A simple approximation would be to periodically check the panel's open-circuit voltage and then keep the voltage at 80% of that.

[@deslomeslager]

Never thought of that! I need to dig into this. It will most certainly outperform a PWM method.

[@AyushIND24]

Can you please send any link to that project pls urgently

[@joeporsche1767]

I agree this is not MPPT.It is only charger circuit but the Video still very usefull.

[@Ahmadnaweed786]

True

[@johnward7619]

Great project. MPPT code coming in future video with upgrades

[@ELECTRONOOBS]

Arduino Course (Spanish): bit.ly/3ldW6kO Follow me on FACEBOOK for more: facebook.com/Electronoobs Help me on Patreon: www.patreon.com/ELECTRONOOBS

[@mlab3051]

Where is MPPT Algorithmm? Do I miss something??

[@duncanmcgregor4973]

No. at the moment it is only a chargecontroler with float. looking forward how he progressis

[@metamud8686]

6:14 warning: missing snubber / flyback diode on relais schematic. Everytime the relay switches off a high peak current is now endangering Q3, your BC547. Could use, e.g., a 1n4007 positioned on pins 2 and 5 so that current can flow TOWARDS the positive (pin 5, +5V) side.

[@SupernovaSpence]

I might end up using your system for one of my projects :)

[@snipersquad100]

Looks interesting. I'm glad for people like you who open-source their projects because I like electronics but not good at programing.

[@hrithikhu]

Eagerly waiting for the better version of this project 🔥

[@jackwilliams2010]

Your recent videos have been inspiring me a lot. Thank you for all the high quality content!

[@ELECTRONOOBS]

Glad to hear that. Thank you!

[@MartynDerg]

I'm not going to be attempting to build an MPPT controller but I am in the market to buy one and wanted to learn exactly how it works, and you delivered exactly that, the educational value of this video is brilliant, I feel I understand it way more now. thanks heaps!

[@PhG1961]

A really nice project and an entertaining, educational video. Looking forward to see the final product. Hurry up !!

[@nkamajola7099]

please tell me what software was used to draw circuit

[@josemanuelalogoadjomo7863]

I am always happy to be notified when you upload a new video ,great WORK from EQUATORIAL GUINEA!!!! your advanced arduino series has changed my codding level thanks indeed!!!!!!!!!!

[@Nando_]

so I'm not really capable to fully understand electronics and just bought Arduinos and sensors to start playing but I would like to someday have a 12v battery/solar powered system running my optical fiber/wifi internet router, some charging USB outlets and my LED house lights, so if the power gone down I could still have the basics running (already have grid tie photovoltaic system and planning on installing solar water heating system) since it all runs on DC I wouldn't need to convert it to 110v AC for the power bricks and internal LED lamp inverters convert it DC again, avoiding losing power by heat during the process of course it have to accept grid charging when the sun spend some days not that bright... it's not really common here in Brazil, but it is possible to happen I could do it all right now using existent products, but maybe I can make it on a better and smarter way (IoT) you're project are just perfect to help me understand the needs... I'll keep watching thank you mate 🇧🇷

[@lexander9686]

Good luck my friend, hope all goes to plan

[@kunalpagar5465]

Nice explanation.. since it is a three step lead acid battery charger with buck converter.. you can modify your code for mppt as well.. with only few lines. You can use mppt code during bulk charge only and rest time CC and CV charger.. in mppt code, you can calculate power and change the pwm duty cycle for max power only.. once you achieve voltage threshold, change the mode from mppt to CC and then CV..👍

[@samuel0318]

When I search for mppt princilple to apply on battery charging, this is the best description I can understand.

[@user-gw1pj7fh7q]

Однозначно спасибо за ваши видео уроки по програмированию микроконтроллеров 👍

[@sephyp1611]

Hi. Nice job, but this is not an MPPT charging controller. Its a PWM controller.

[@alanaland1990]

It is MPPT. Have you looked at the schematic? A PWM controller has no charge pump output, just a switching device. The software will allow MPPT and vary the output accordingly.

[@suryakarmakar4240]

Its not mppt. It does nothing for tracking maximum power point for the output. It just varies according to the battery not the input voltage. If it was MPPT it should be able to dynamically able to vary voltage and current according to the input from PVs

[@alanaland1990]

@@suryakarmakar4240 Your right but it should work more efficiently than PWM.

[@shermluge]

I love the it just for the learning process, can't wait to see the future ones for newer algorithms, addons, etc.

[@stefanogizzler]

I love this guy, he is fantastic! Just bang on mate! Keep it up high!!

[@garyhalsey7693]

Very nice job on the basic principles, can’t wait to see the next iteration and the improvements you make to this with it!! Great channel, long time subscriber, keep up the good work!!

[@sausagehider]

Little confused. Nice project but so far there is nothing about it that is an MPPT, this is just a programable (very useful) charger. For MPPT on solar panels, the idea is to harvest the maximum power from a solar cell. This power is a variable product of the voltage and current they don't just supply current a voltage, it heavily depends upon the load. The 'load' needs to vary to be able to draw maximum power from that available from the cell and then produce a fixed output either in voltage or current. It is not as simple as connecting a battery charger to a solar cell and cannot really be simulated by using a bench power supply, hence the name, Maximum Power Point Tracker! For example, the more current you draw, the lower the voltage but not by a predetermined amount like a discharging battery, as this will depened on the factors of amount of light, temperature, cell makeup and age, etc. It's a careful balance between current and voltage, a high voltage and low current can have the same power as low voltage and high current, it is the job of the MTTP to find that balance point and track it. It is a very useful project and I am quite interested to follow, therefore I hope this is just the start and you will be progressing this into an MPPT controller. Thanks for your work, love your videos.

[@ignition_electronics2520]

Always waiting When you upload new video Thank You so much sir for your support 🔥🔥🔥

[@ELECTRONOOBS]

Thanks!

[@ignition_electronics2520]

@@ELECTRONOOBS Really I love u sir I learnt alot from your Channel Thank You so much and keep it up 👍🔥🔥🔥🔥

[@alexscarbro796]

An excellent video, very clearly presented. It’d be worth going over in more detail WHY MPPT is important.

[@SIKHGT650]

Super great ultra pro max project.... waiting for lithium one ...

[@llleoha]

I might be missing something but this has nothing to do with MPPT. It is just lead-acid battery charger.

[@lezbriddon]

cant wait to see mppt implemented on the solar side, panels have strange power curves, shame julian ilett didnt finish his mppt it was almost complete

[@ranaharsh365]

This is simple buck converter with some modifications. How the circuit collects maximum power from the input as the project name is MPPT!?

[@bashaaksema94]

He said he calculated the input power somewhere and he showed that as well. As I see it the mppt part is the 3 modes but other then that I agree this is not really an mppt as it should calculate the maximum input power and regulate accoardingly. Problem is also he never lowerd the input voltage as well

[@christiankulmann3325]

Yes a simple boost buck converter or step down converter.

[@capicua4451]

@@christiankulmann3325 The project has almost everything to do the MPPT. Just make the loop by varying the PWM depending on the Vp x Ip product. (p = panel) There is a small error in the power calculation, where Vp x I (battery charge) is done and it should be Vp x Ip

[@elektron2kim666]

If you have an apartment, you should try it anyway. INSIDE. Some windows don't really block the "enough sun light" so you can place solar panels towards the south (in the northern hemisphere) and cloudy weather doesn't take it all. Go for double (24v/series) for 12 volt batteries and you should turn it off at night as the controllers take quite much. Maybe I'm lucky with where I placed them and some extra windows to the sides as well.

[@clarkso65]

This is a great video I hope the full version of this mppt would be released handling greater current. 10A is nothing nowadays.

[@makkam7575]

Amazing video as always. The only thing i would add to that project is a temperature sensor. Also a while back I added a diy battery monitoring system to my ups where the microcontroller communicates with a python server(raspberry pi) so I can see the voltages and temps on all batteries. So I would highly suggest in addition to the sd card adding an esp32 or raspberry zero w as a server with the ability to auto shut down for example if the battery's temp go over 45 degrees and to get an email of the logs, graphs and what is the problem in a pdf (very easy with python, mqtt, smtplib, json reportlab, matplotlib....)

[@makkam7575]

And of course some pd control

[@saurabhgawli2167]

Liked n commented before watching the video as usual... Luv from India❤

[@oblitum]

Tío, gracias. Estaba mirando en ali un cargador para hacerme una farola solar con varias placas de 80w antiguas. Me has alegrado el día y animado a montármelo por mi mismo. 😁👍👍👍👍👍😍

[@backdemoletor4654]

This channel is so underrated... You really bring a lot of interesting and good content... Keep it up

[@ELECTRONOOBS]

Thank you very much! :)))

[@kareemnasser3965]

A pid or pi control algorithm will make this project even more interesting. Nevertheless it is still an exciting one and can't wait for the final version really😻

[@jacquesvermaak373]

No, I've tried PID on my system. You have to seriously filter your MV (Measured Variable) signals for the PID to be quite stable. It does not really stay very constant. I do however use PID on my fan control. My P-Chan MOSFET is connected to a heatsink. (I do about 80Watts on my system) and the MOSFET does heat up quite a lot. I have a fan cooling the heatsink at a constant set point temperature. I use 10k NTC resistor for temperature monitoring. I used to use the Dallas DS18S20 sensors, but I've have failures on those sensors more often than I would have liked :(

[@imcrazy886]

@@jacquesvermaak373 The MOSFET worked at the ON/OFF mode, It won't heat up. You might need to check your design.

[@ignition_electronics2520]

I think INA3221 3 in 1 current sensor is better sensor for this project for monitoring solar Current, battery Current, and load Current. May be in future projects.

[@WiardBeek]

Or you can use INA250 with built-in sensor of 2mΩ (4.5mΩ package resistance) and analog output. Draws maximum of 300𝜇A from Power Supply.

[@joshitoshi9835]

mppt charge controllers available in market are very costly, so if you could manage to make a working 30 amp or 50amp mppt charge controller with all features will definitely helpful to many diy fans. keep it up and hope to see a final working project.

[@vehasmaa]

Well its not as easy as this video claims it to be. Here it didint event touch MPPT part yet. Witch is pulling maximum boosble power from source. In this PSU case that wouldbe 24V@2A constantly. There is reason why real MPPT units costs so much. And why even Chinese has not been ableto pushprices down to dollars.

[@robertparenton7470]

Thank You. I have learned a lot from this Video. From Frisco, TX

[@electronic7979]

Excellent project

[@stephenpearce3880]

8:06. I suggest you relocate the LED1 across the relay coil which confirm the Q3 driver NPN is actually working. At present the LED1 is only indicating that a voltage has been applied to the Q3 Base and there is an assumption that the driver transistor Q3 is working correctly. Overall a great little project. Like it and look forward to V2

[@hrudaybedre8633]

I was planning to build one fifth the 700w solar pannel I had laying around Will wait for the final video

[@MrWhilelion]

Great job especially in explanation

[@karljay7473]

I keep hearing how expensive these controllers are, yet it really doesn't look that complex. It's more complex than a standard battery charger, but it looks like someone should be able to make one themselves and save some money. I look forward to seeing the next version.

[@altosack]

The problems (and expense) come when you increase the current to something useful for, say, a household solar electric system.

[@guywhoknows]

I noticed you did this in December... Sunny! ;) I was looking at the PWM charge controller. You have no current control. For voltage reference within the code. The prime of MTTP is a current and voltage play off. Raise the current till the voltage drops. Start with the highest Voltage. Of course it's not easy with one panel, in winter.. Here are some panel stats. OV38.7 (nom, hot 41.5) 8.78a OI MPPV30.4 MPPI 8.37 Seasonal changes occur, the I is lower In winter and I can drop voltage. There is 5% under what's.printed on the panel backs. Let's hope you can do this, and you need to add more safety. I noticed some spikes are not protected.

[@hobbytronix]

Great job my friend. Keep going

[@SantoshBhagwat1976]

Thanks for this great video, waiting for further upgrade with control switches for different voltages. Thanks again for this great efforts 👍👍👍👍👍👍👍

[@keithfetterly4111]

Awesome work! Keep it up. 👍

[@neail5466]

Hi, just a point I want to mention, you could have used a linear regulator for the mcu as those cheap buck modules are not reliable, if accidental short circuit or something else happens those gets reset plus the mcu power requirement can easily be met with linear regulator. Thanks for the input current monitoring idea I was thinking of upgrading mine so this would be a great addition in efficiency monitoring also solar cell Dirty warning if used in conjunction with a LDR😁.

[@JoeMalovich]

This would work really good for microhydro with the correct time settings!

[@startobytes]

What about a pcb from JLCPCB for this Projekt?!

[@lexander9686]

Still a prototype

[@Nando_]

it's still in initial tests fase... he will do that after he troubleshoot the major issues

[@thatradioguy6839]

Also shipping I think is slower than usual Ordered a ender 3 v2 on the 23rd, not even tracking info :(

[@kareemnasser3965]

Yes, he should finish it asap and share the pcb, we can't wait😁

[@TradieTrev]

EVERYONE LOVES ADS!!!

[@rubenafonso]

Great "how not to make a mppt". A solar panel can not be simulated only with a power supply without a diode and a small resistor. With the power supply the mppt will not work. And with just a if state, without some type of PD controller....the battery with last forever....not!

[@pritambissonauth2181]

I have noticed in the schematic, that the coil for the load relay has no flyback diode in parallel to protect the microcontroller against voltage spikes! Next in the video you did not mention about the MPPT circuit operation, main reason I watched it. However you did well describe the charge controller operation for the battery circuitry. You said using that you would be using the lab bench power supply to simulate the PV modules, which I do not think would be suitable. I have also experimented with 5 of the modules [same as you showed] in series, got 28V in open circuit, but when connected to an off the shelf buck boost converter to output 13.6V, the PV side voltage was never more than 2.9V and the current was no more than 0.06A. Hence the need for an MPPT to harvest the maximum energy from the PV modules. As per your schematic, should you not be using a synchronised buck boost converter circuit instead?

[@mrnixie]

You need a flyback suppression diode across relay K1 or Q3 will be toast after a few cycles! And also add a resistor in series with the base of Q3 to limit the current. 470 Ohms will do it.

[@worvtube]

About the schematic in your web site.. You can add flyback diode to the relay. The Bat+ on the H3 connector pin 2 is wrong I think. It goes to GND, so you mean Bat- I guess. Q5 emitter and Q1 goes to the same place right?

[@hadeersaad6491]

I think it is Bat- and unnecessary because where does it goes to anyways?

[@hadeersaad6491]

Q5 and Q1 i want to make sure they connect to panel+ too. I think you're right they go to the same place

[@MikesAllotment]

Very informative & well explained. Just wondering whether you have any plans to take this further beyond this initial prototype stage? In the current global energy crisis this will be incredibly useful for us makers 😉

[@gilsonsoares-mz2lc]

no KZbin tem vídeos do canal rfilhos altos sobre controladores caseiro mppt ?

[@pranjal3727]

A weak pullup at the BJTs base to or something to prevent something bad when micro boots with undefined pin state or flash corruption...

[@jacquesvermaak373]

I have been playing with BUCK converter chargers for a few years now. I noticed some things that in real life might not work as well as you would hope. I notice you are using a N-Channel MOSFET, with HIGH side connection. You get your desired voltage by connecting to the Solar Panel. Now, what happens on a cloudy day, or when you really draw a lot of current to charge the battery, and your solar panel voltage drops (For example: I have a 160W panel 22V open circuit, and mine drops down to as low as 14Volt while charging at 5Amps). I have tried various methods to ensure the high side voltage for the N-Channel MOSFET gate, but it all added to quite a lot of extra components. My solution, I changed to P-Channel MOSFET (Yes, I know the internal resistance of a P-Chan is not as low as an N-Chan, but to me it was acceptable). Also, I use two shunt resistors in series with the Solar Panel and Load, and with an OP-AMP, I measure the current flow. I select my Analog measurement range to 3.3V vs the normal 5V (it gives a much better resolution). I will try your example code for all the modes (BUCK, FLOAT etc.) Currently mine just keeps the voltage at an adjustable voltage set point. I've been running a charger circuit for over 5 years now on my method, and the battery is still good. Nice project by the way :)

[@RobertNezz]

Nicely explained and usefull video, however a bit missleading.This is not a MPPT controller at all. This is a PWM charger with proper charge phases.

[@leang2157]

Thanks for tell me about the load enabled/disabled(relay) and how the green led light up when voltage is low!

[@kareemnasser3965]

Please share the gerber file of the design. I can't wait to try it.

[@raufanwer5176]

Very helpful video. Good effort

[@subash001s]

Sir We are aggressively waiting for Future version of MPPT Solar Charger Prototype pl do as soon Sir

[@EasyOne]

Very well explained

[@mannyquinn9031]

Beautiful video ,thanks so much ,I learnt a lot!!

[@amnesie6615]

Cool and interesting! Like!

[@shehryarshaheen7115]

Bro love the idea of data logging. And please add DOT MATRIX display like nokia 5110 etc. Keep up the good work. Always waiting for your next videos.

[@vehasmaa]

This is not MPPT i think. This is switching mode battery charger. WhatMPPT does is extract maximum power from solarpanel constantly changing its load to panel, always looking for that maximum power point it can draw. In this video there was no maximum power tracking. If there was it would have gone to pulling that 2 amps from PSU constantly. MPPT maximizes power pulled from source and docent care what happens to that power after that. Nice project even it its just battery charger not MPPT controller.

[@spencerkittleson]

Incredibly good job of explaining everything. The only part i'm confused about is the voltage regulation using PWM via a mosfet. Are there any resources you can reference on how that works?

[@banzabest6027]

Try to see this explanation kzbin.info/www/bejne/Z6CpnZZqn9tlY8k

[@sabbirahmedsumon1023]

How can you simulate a solar panel with a lab bench supply? And where is mppt here? You just build a smart lead acid charger.

[@L_inventeur_Rapide]

Waou cool tank you for this vidéo and code complet schema I am enjoye

[@jobit_joseph]

No MPPT algorithm, just pwm control

[@station240]

Yes read the code, no power tracking (compare previous power output), no scan function to find maximum power point. However, the hardware is capable of MPPT, when he adds that second current sensor.

[@ELECTRONOOBS]

Thank you. I'm still impoving the project and do the best I can. even so, the control is not a simple PWM. We control the current and voltage is going from the panel to the battery at all time with a simple algorithm. A PWM regulator can only be used if the voltage of the solar panels and the batteries is the same, which in this case is not. The controiller could change voltage and current values at all time.. Have a nice day!

[@jobit_joseph]

@@ELECTRONOOBS hi Dear Electronoob I understand that it's not simple pwm but pwm controlled balanced / trickle charger. But MPPT and pwm solar chargers are different .I can see that you have added a buck converter to the circuit, As @station240 mentioned above your circuit can be modified as a MPPT charge controller by adding an current sensor to the charger output and changing the you. You must monitor both input and output power , calculate the maximum powe point and control the buck converter according to that, so that we can archive maximum ( not a 100%,but more than that of a pwm charge controller) Plus with a synchronous buck converter ( you mentioned it in the video,as h bridge driver insted of transistor MOSFET driver) you can improve the efficiency.

[@station240]

@@ELECTRONOOBS Yes, it's DC-DC with current limit function (well switches to CV+CC for float). PWM chargers lack the big inductor, easy way to spot the difference.

[@ELECTRONOOBS]

@@jobit_joseph Thank you very much for all this feedback. It will help me improve the next version!

[@mikailunal7923]

Great video! The pwm signals are a little bit oscillating, it would be more useful if we did it with PID control. maybe you can make a video " mppt solar with PID control " for you followers! :) Thanks

[@sandeepnaik6818]

Instead of sd card reader how about esp32 where you make app and see stats through you're smartphone

[@popobart]

I believe, the 2A are the limit for the battery - so at 12V. If you give 1A at 36V from the powersupply, that is approx. 3A going to your battery... or? Nice project! Thank you!

[@hnasje66]

I think you are right on this

[@nkamajola7099]

please tell me what software was used to draw circuit

[@henrymcraven7246]

This is exactly what I was thinking as I watched. If you are only monitoring one current it should be the actual charge current. In reality you would have to measure at least the input and output currents. The input to optimize power from the solar panel and the output to the battery to protect it from exceeding it’s ratings. Measuring the load current would be necessary in order to really optimize the power extracted from the solar panel. That way you can produce more power than the battery requires when there are load demands are there to utilize the available power.

[@zeoka4045]

Waiting for final circuit 😘

[@orides5976]

You need to sit down to wait more, unfortunately...😐

[@Nono-hk3is]

A couple times you said that when in bulk mode we don't care about the input voltage. I know this is lead acid not lithium ion, but doesn't the input voltage still have to be higher than the current battery voltage? If so, what does the mppt do when the input voltage drops too low?

[@aragornale]

Take a look for the INA219, an I2C UPside current and voltage probe. In other hand, why not to use a delta-I method to reach the FLOAT point?, an used battery never reaches the floating point current, so, the delta-I method, serves for any battery state and the final current when you reach it, makes you know the battery life state.

[@RAUF.Y]

Best video plz continue thi project

[@saifi1223]

Here we are still waiting for your next video on mppt solar charge controller..

[@RAUF.Y]

Waiting for next mppt video

[@SumitSharma-do8ye]

Good job

[@fernandoschultz8923]

Great job...

[@reyrank2846]

you're such an inspiration....thanks...

[@dantronics1682]

I understand the charging circuit but not the mppt side, can you do a video explaining that side please.

[@MaxiG]

Really cool project!

[@infofoolygun]

Hi :) nice video 🤩💗🤩 , what do u think, about multiple independent inputs ?

[@alanaland1990]

I see a problem with the transistor switching the mosfet, it will be on all the time with higher solar voltages. A high side mosfet driver IC is normally used instead of the transistor.

[@ashok_ign5623]

Great Project 🔥🔥🔥

[@nowheremanjk8624]

I always put a fire extinguisher on the prototypes, or at least a sandbag. ;-)

[@anonuser2640]

Now you should make in IoT (this is a challenge)

[@saliksheraz6236]

Explained very well

[@primescienceprojects]

Wtf! I'm waiting for nixie watch part 2 When will you upload it 🧐🧐

[@dewaldliddle9860]

Thank you for the lesson. Now I understand how a MPPT works. Looking forward for the next video on this.

[@dewaldliddle9860]

I have most of the components and rethinking on buying an MPPT controller.

[@Kris_M]

@@dewaldliddle9860 This is not an mppt, just a charge controller.

[@nkamajola7099]

please tell me what software was used to draw circuit

[@renaudfensie3020]

Not really mppt since it doesn't track "maximum power point" but I guess you're adding this in the next video

[@manoftheday1]

please make the final part of the video thanks.

[@Youtechnoid]

Curious about the efficiency ?

[@mrnixie]

It will be 80 - 85% at best.

[@manishmangukiya1341]

Make video explaining function of all diode

[@ElectroMentor]

Perfect 👍

[@ezeoluchukwu5104]

Sir we are still waiting for the advance up grade of the MPPT because it will be the best of MPPT on the internet so far. Waiting...

[@JosephMugalu-nx1ch]

Interesting mppt

[@Amperekaefer]

Grossartiges Video 👏👍👍!