Comparing + Sizing MPPT vs PWM Solar Charge Controller

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Today, I’m going to go over the fundamentals of the solar charge controller including understanding the difference between MPPT and PWM as well as making sure you are sizing your charge controller properly.
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Disclaimer → None of the diagrams or added images are my own... they are simply being used to illustrate these concepts and ideas.
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Hi! We are Michael + Jenny Justus. We post videos on our life of alternative + sustainable + healthy living. Our desire to live a more meaningful life led us to concoct a crazy plan: Downsize our belongings, ditch the "9-5," and move full-time into a solar-powered, self-sustainable tiny home on wheels with our two dogs, Chase + Roni. Taking this leap into the unknown has completely transformed our future, so be sure to hit that SUBSCRIBE button, join the Justus League, and follow along to see where the journey take us!
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Опубликовано:

4 окт 2024

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Комментарии : 283

@DuetJustusFam 6 лет назад

Hey guys! Hope you enjoyed the video! It's a ton of info but I found an awesome video that goes into the technical differences between PWM and MPPT. Check it out here if you're interested in learning more of the "dirty details" → ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wmyuxKmlBCk.html. Let me know if you have any questions and I'll do my best to answer as many as I can... see you all on the next one 😎 ☀️

@abhishekkumar-oi8qk 6 лет назад

Duet Justus thanks

@samudeenaziz3706 6 лет назад

how to making solar

@Talesfromtheblitz 6 лет назад

im about to buy a system for my VW Rialta RV and i have 2 batteries already ran off the car that charges them but i want i want my own boondockind tech deck for my fridga nd computer and camera gear n tv basiclally everything but the AC! amazon has alot of decent deals around 60$ for 200 watts is what i want and i have a 2000 inverter already to hookup,so what solar panel, ,controller and baterry should i get?? ..btw cant afford Lithium yet..

@nonobebert7646 5 лет назад

A question about the size of the controller : my system and my batteries are 12V, what If I connect my 2 12V 135W solar panels in series, do I divide 270 by 24 or by 12 ?

@lilysgarden9810 4 года назад

very easy to understand even from someone like me, a senior woman, who does not know anything but wants to build a solar powered small home. Thank you.

@littlemisssunshine2931 4 года назад

As always incredibly clear and concise information that even I can comprehend, not that I'm unintelligent, my brain was just never wired for any electrical information; looks like that is slowly changing thanks to you. Thanks for sharing.

@gvjester 2 года назад

Just came across this video. Holy smokes, Outstanding vid, out of dozens, this is the BEST, most concise and easiest to understand I have seen!!! A little late but many thanks!! ☺

@spanishcamarillo1740 6 лет назад

I spent hours trying to get these answers through other videos. Thank you for sharing this info! Super informative and helpful👍🏼

@DuetJustusFam 6 лет назад

Awesome! So glad it is helpful!

@TomandLoriRVLife 6 лет назад

With each video, I get one step closer to installing solar on our rv! Thanks...VERY helpful, VERY informative!

@DuetJustusFam 6 лет назад

You're so welcome Tom!

@robertgarbe6348 6 лет назад

As a practical matter in the context of a RV, except for very large arrays in very exposed situations and very careful panel placement, a PWM controller will come very close to most MPPT. Shading as you have noted is important and can be an overwhelming factor in a solar rig that moves from place to place and is affected by AC covers, campsite locations etc.

@throwaway3661 4 года назад

Excellent explanation without too much wordies.

@avocado3748 5 лет назад

You have been the only one that has broken it down in an understandable manner. Thank you!!

@jeffreyscott4564 3 года назад

Simple and concise explanation of the controller differences. This is going to help me build my solar system on my Overland truck build. Thanks for being so factual

@troyseagondollar4565 6 лет назад

Incredible knowledge. I watched all three videos - panels, batteries, and controllers. Now I feel more comfortable talking with the solar companies. Thank you.

@beareramlal8842 2 года назад

Hi There Its Beare Ramlal here from Gauteng, South Africa. Your videos are extremely useful. I'm currently designing a solar system for my small holding (small farm) Thanks for this initiative

@trevortrevortsr2 4 года назад

On smaller systems, it's worth noting that under 10watts MPPT stop tracking - so I use PWM on a small 20 watts system on my shed for charging car batteries with a well-matched panel that peaks at 17.5v - and an MPPT on my 280-watt system on my motor home where the panel peaks at 32volt and the lifepo4 battery is charged at 14.4volt. So i would say well-matched panels on sub 40watt systems PWM works well

@klouism1 6 лет назад

Love it. Thanks. I find the simple illustration all I need. I am not too tech savvy so your videos will help me select what I need. Stay well & keep having fun.

@DuetJustusFam 6 лет назад

😎 👍🏼

@Joshuatreelocal 5 лет назад

You articulated everything well, and were concise, so I gave you a sub for not wasting my time! This is what I look for in videos

@hogcat858 6 лет назад

To make it simple for folks the way to go if you do not live where the sun shines all day and is cloudy alot, go with a MPPT controller. In a 12 volt battery system wire your panels for a 24 volt system. The MPPT can handle the higher voltage and charge your 12 volt batterys. The advantage is when cloudy the panels will still be putting out higher voltage with fewer amps to the controller. The controller changes the voltage into more amps to charge the batterys at 12 volts. But if you're out in the desert or where you get sunshine most of the day, either type MPPT or PWM will work fine. I found that a MPPT charge controller taking in wired for 24 volts solar panels will be charging a 12 volt battery system at nite parked under a street light!!!

@DuetJustusFam 6 лет назад

Great info here. Thanks!

@bendicionsmart1297 6 лет назад

For real

@tikitiki7610 6 лет назад

THX MUCH HOGCAT

@59Wanders 4 года назад

Hey, i love your simple and straight explanation. It really helps me. Thanks mate.

@haveminivanwilltravel 3 года назад

This is exactly what I have been looking for! Thank you. Great video!

@vicarioustraveler1507 6 лет назад

Thanks for keeping it simple.

@darrellwampler6473 6 лет назад

Thanks I always learn something from your videos! I always wondered about the amp size controller needed. Thanks so much.👍

@DuetJustusFam 6 лет назад

You're welcome Darrell 😊

@gordonmcgill4532 4 года назад

Fantastic! Crystal clear explanation and exactly what I was looking for. Thanks.

@falcundo 6 лет назад

Just found your channel. U do the best job I have seen simplifying the solar process. Will subscribe. Look forward to watching the archived stuff. Peace!

@michaelm9621 6 лет назад

Keep up the video, this is a must have info.

@DebjitDas93 4 года назад

A lot of useful content in 7 minutes. Thanks!

@soving 4 года назад

Great articulate and informative videos sir. Thank you.

@davidfountainenato6366 Год назад

Great teacher

@bitworkx6028 6 лет назад

Good well laid out information. I like the comparison charts too.

@bbjnimens 6 лет назад

thx for your video and also for the reference to the AU Direct video... both much appreciated.

@MrMraza123 4 года назад

Thanks for explaining.

@MrHenstak 4 года назад

You have been helpful in your explanation and its really amazing thank you so much for those details.

@DianaSFNg 6 лет назад

Wonderful information! Very helpful and clear. Thank you very much! 👍👍😊

@DuetJustusFam 6 лет назад

😊😊😊👍🏼☀️

@dhulbahante1dhaanto82 6 лет назад

We get one step closer to installing solar on our rv! Thanks

@LeandroSantos-hv3nw 6 лет назад

Very good videos. I am always learning. Best regards from Holland

@GVChannel 5 лет назад

I will change PWM to MPPT soon!

@faridmakkawi3174 5 лет назад

always you are in right track ,informative

@franciscambron 5 лет назад

Clear concise explanation. Thanks

@offgridcitytrapper7545 4 года назад

Very well explained

@odayobaba8325 4 года назад

wow good explanation thanks keep it up

@ekeochapascal2815 Год назад

Nice and appreciative,but i need to see the diagram of the panel to the inverter to the battery and the building

@toddramsay977 6 лет назад

Would love to see a vid about the differences between mppt vs own. I want to learn as much as I can about solar so I can engineer mine. Thanks for sharing your knowledge!

@DuetJustusFam 6 лет назад

Hey Todd. There is a link to the technical video on these two types of controllers in my pinned comment on this video. Hope this helps give you all the info you need. Thanks for watching!

@lisahernandez2614 6 лет назад

I'm a home stead homie checking out your channel

@DuetJustusFam 6 лет назад

Welcome Lisa! Thanks for stopping by! 😎 It's great to have a fellow Homestead Homie along for the ride.

@forestbrooks4025 Год назад

I understand the 50 amp requirement for the 600 watt solar system. But do a 600 watt solar array ever produce 600 watts. Most panels are only 15 to 20 percent efficient. Cheers great video

@acebryantaruc9893 2 года назад

Very informative.thanks

@gay30000000000000000 6 лет назад

You have given the best and easiest advice to understand, on the whole topic. If you haven't already, then you should defiantly write a book. Thank you so much for putting in all this work. You are brilliant

@khaledhassan9126 Год назад

Yes I want to see the in details video please

@fu1945. 2 года назад

Thank you for your video.

@fishhuntadventure 3 года назад

Curious about this. Some PWM charge controllers will output 12v with a 24V input from the panels. Why do you believe this cannot be done?

@countryboycharlie9793 3 года назад

Great video 👍

@TheClaytonPaul 5 лет назад

another great video ! well done !

@richardpayne9640 2 года назад

very good information Thank you,

@JesusDisciple99 4 года назад

Thank you so much ... very clear with you

@darlingtonkachuwa5012 4 года назад

Thank you véry much.Was well explained.

@PAPAPcravings 4 года назад

Thank you For the formula.👍

@tomtumun9791 2 года назад

I'd love to see the video

@glutenfreejoe6099 6 лет назад

Very informative & Interesting :) So glad RV Jedeye Introduced me to your RU-vid Channel & So glad Carolyn's RV Life RU-vid Channel introduced me to RV Jedeye RU-vid Channel :)

@DuetJustusFam 6 лет назад

+GlutenFree Joe Thanks Joe! We’re glad you got introduced to everyone as well. The RV community is full of amazing and friendly people. Thanks for watching 😎👍🏼

@geraldhenrickson7472 5 лет назад

Joe...have you found any GF bread that is palatable? Please toss back a comment about which brand if you have. I am really hurting here. Meanwhile I will check out RVB Jedeye

@thomasmcfeely8869 6 лет назад

In layman's terms you nail it. Thanks for making this stuff easy to understand. Enjoy the graphics.

@ph4rddesciple719 3 года назад

So I connected a square foot solar panel to a 12 volt battery that was drained to 11 volts. The solar panel puts out 24-28 volts. After a few hours, the battery was back to 12 volts. Please explain why I need a "charge controller"..thank you for the video-better than most....

@guywhoknows 2 года назад

That other kid did a live comparison with different price mppt and pwm controllers and found little to no actual difference in the performance. About 2-4 watts.. There was one test condition that had around 40watts for the mppt CC. But this was a small window and thus having watched the live showing of a wide range of CC's I was going to get a mppt, but will not bother with the 7 times the price for 2 watts. My next consideration is micro inverters, but they're grid tied, there are no batteries. And they are split, so you can have half the array shaded and it will maximize power. Each unit supports 4 panels and you can string them together up to 6 units. I will be trying a buck converter, as really the mppt is just one of these with a voltage check, if it lowers the voltages, it raises the amps, so if you have a 18v 4 amp and need and are charging a 12v battery. You may get 13v at 6 amps... Or if you have a 33v 8 amp, you would get near 15amps. There 87-99% efficient depending on what you buy, but there around the same price as a cheap PWM controller. But you would need to add a cut off..

@gregoriojc 4 года назад

Thanks very clear explanation

@mirchichamu 6 лет назад

Thank you very much for the awesome videos full of information. But one suggestion please which many you tubers neglect. When you show some diagram, please show it for a long time. We can hear your voice but we miss necessary information in the diagram. A diagram conveys more information than what you talk the same. You can talk in the background but please show the diagrams for a long time. Thanks and sorry if I annoyed you or anybody.

@menard700 6 лет назад

pause it

@marcvivier4887 Год назад

Very well explained - thank you!! 😊

@cabinstuff 4 года назад

Great exactly what I wanted to know thanks

@mikkyjoe2005 11 месяцев назад

Talk about more functions of the mppt

@MrCancercbc 2 года назад

Thank you. Amazing videos. Can you make a video about different types of inverters like Growatt or Must and what does hybrid means and being PH or PV... Thanks

@JustHobbiesoke 6 лет назад

Nice i need this info...thanks for sharing...

@InsaaniatDost 5 лет назад

Nice😊 But pannels dont produce exactly 12 volts.. they can go up to 20 volts.. So keeping this variation in mind.. how can we select a solar charger both in MPPT & PWM

@geraldhenrickson7472 5 лет назад

Controllers come with an open (max voltage allowable) voltage rating. Use that figure for calculations.. BTW...I have panels labeled as 20 volt, 30volt and 80 volt. Get a multimeter and starty measuring maximum voltage and current. Be careful.

@puddin94 3 года назад

Nice vid thank you

@marigoldlimbo6931 6 лет назад

the girl one name Pipi Peterson and you is the best explanation i heard. maybe you can answer this. i know this is simple but the ration is confusing..

@lvtaylortaylor9904 5 лет назад

Good info Thanks

@jimmyzelski7742 3 года назад

The price difference between PWM and MPPT isn't as great as it was when this video was created. Back then, there simply weren't many inexpensive MPPT controllers around. It's different today. For example, the EPEver Tracer 2206 AN controller is a 20 amp MPPT controller and is available on Amazon for around $60. I just installed one on my sister's Lance 1575 (200 watt system). It works great. But I agree with others who said that PWM can be just fine in many situations. In fact, I've had a PWM controller in my camper for the past 11 years and have never needed MPPT. MPPT is great when two situations happen frequently: Your battery bank is discharged fairly deeply, and you camp in colder climates. The first one is true because MPPT does it's magic best during absorption (aka boost) stage of charging. After that, the controller is throttling back on the amps anyway. If you don't discharge your battery bank very deeply, the controller won't be spending much time in absorption stage. The second is because the solar panels' Vmp (max power voltage) is highest when the panels are cooler. That translates to more watts when the MPPT controller operates the panels at that higher voltage. For most people with small systems though, PWM is just fine. But if the price difference isn't much, might as well get MPPT.

@rjl9707 2 года назад

Thanks for input...

@tonybeach4725 5 лет назад

Awesome info. thank you.

@romand5209 5 лет назад

Yes, please need explanation video!

@Zoe_Zoe7 5 лет назад

Hey Dude you save me ! Thanks a lot I was wrong on size of control ...

@nuces1 6 лет назад

Great work

@mobilehomelife4028 5 лет назад

Great video!

@wa9kzy326 5 лет назад

Excellent.

@kkzone2983 5 лет назад

Nice video

@bivashmondal3804 4 года назад

Great... Thank You.

@chukwuebukanwajagu5922 5 лет назад

Like your videos. Welldon boss

@mickeysherman3404 6 лет назад

I will like to see more of yours video...

@niallwildwoode7373 3 года назад

I've had a Tristar PWM for years and it's worked well. But for the last year it's barely ever diverted overcharge to my dump load, and always indicates state of charge as being below maximum even on long, sunny days. I measured my batteries and they're waaay overcharged...up to 30% over. I'll go to an MTTP I reckon.

@dangonzales2896 4 года назад

Would it be too hard to slow down or do you have a time constraint limiting the length of the videos? I keep having to stop your videos and back up to have time to absorb what I’m learning from you. Thank you. Good stuff!

@MarkSDCA Год назад

You can slow down the video in the setup gear.

@bernhardlirunga474 4 года назад

Thanks for the straight forward en simple explanation. Ma question is how do you do the setting on the mppt charge controller?

@GutoCanalSolar 5 лет назад

Hi, take a hello for Brasil, We ever see your videos, thank

@OfficialLILV 4 года назад

Can I buy a bigger amp controller than what I need? I plan on buying more panels and want to be prepared

@williamsantiago320 4 года назад

Which 2 videos where you talked before this one?

@PISQUEFrancis 5 лет назад

everybody misses one important issue ... I have always heard MPPT controllers have a higher failure rate than a simple PMW controller. Is a figure for an average "rate of failure", available? If sailing along in remote areas, what happens if one's MPPT controller stops working and shipping is difficult? I have too much solar wattage ... I have 600 watts of 18 volts in solar, along with some deep cycle batteries and an average usage of about 200-400 watts per day ... let's just say I have a lot more wattage than I need. I will need more in the future. Now, let's discuss the usefulness of a PMW to a MPPT controller, along with the fact that a person can have a couple rather small PMW controllers sitting in a drawer. Another GREAT discussion could be what is a PMW controller ... what is a "glorified", PMW controller that is labeled as MPPT, what about an obvious PMW controller with those coiled things(I can't find the word), and then of course the typical, more robust MPPT controllers. Is there really a worthwhile "added", operational value to these "glorified PMW/MPPT incarnations? Do they actually fit within their own niche'?

@Nitecrow314 2 года назад

What's pmw? Pulse midth wodulation?🤣

@marckleejoseph2498 5 лет назад

Thx

@buss8009 5 лет назад

You can use a PWM controller even if the panel is 18-20 V with a 12 V battery. It just doesn't want to be able to make use of the Voltage over/above 12 Volt. That's one the big differences between a PWM and MPPT controller! Right???

@ferebeefamily 5 лет назад

Thank you.

@philipjarman65 4 года назад

Great video Michael: Solar Edge advertises that they have panels that have individual controls so one damaged panel in a string does not compromise the rest. Does the MPPT charge controller also do this ? I hope you cover this later in the series

@shutthegate8232 6 лет назад

Thanks Legends.

@jigileypop 3 года назад

can you talk about alternator

@onuohaaugustine1409 Год назад

Please I would like to know how to detect the current the charger controllers produce

@andrewf.7813 2 года назад

I have a Fronius primo inverter - not suitable for batteries in the future. Can you expand the Fronius system with an MPPT charger and batteries?

@bilal12e 5 лет назад

thank you

@PISQUEFrancis 5 лет назад

I had hoped you would cover the MPPT, with a 24 or 36 volt series array, into the MPPT controller at the high(2x), voltage, then exiting(voltage reduction), to charge a 12 volt array and 12v load

@geraldhenrickson7472 5 лет назад

That is a different subject which I thing you will find elsewhere on this channel. The truth is out there...google will help.