Inside MPPT battery charger CHINA 

I have a word or two to say about those controllers. There are two types of those controllers you showed in this video. One is Li-Ion compatible, and the other is this one, only suitable for lead-acid batteries. I have a US$50 supposedly "state of art" PWM controller from Sun21. My system is a 2 325 Wp panels (in parallel), 2 150 Ah stationary batteries and a 1200W Hayonik inverter. I've tried both three charger controllers and I can assure you this is the one that worked better. Despite the fact that they sell it as MPPT and it's not, its software works extremely well. The other two used to charge my batteries all day long and almost never could reach full charge. This one can charge them in 4 or 5 hours, even in cloudy days in real three stage charging cycle. It also has an efficient control to limit the panel voltage on the batteries. I couldn't control that with the other two. The Hayonik inverter has an over voltage protection that switches off the output. When I was using the other two, I had to turn the panels off in order to keep my system running in very bright days, between 10:00 to 14:00. With this one I can set the output voltage to a value that cannot trigger the inverter's protection and still fully charge the batteries. I used to produce 0,5 kWh/day with the bad ones, and I am producing almost 2 kWh/day with this one (I have a spreadsheet that controls my daily production). My conclusion: It can not be a "real" MPPT but it has a very smart software that gives it a huge performance gain over other PWM controllers. My next step is to compare it to real MPPT controllers. My advice: Be carefull if someone decide to buy one of those: there are two types using the very same case and with almost exactly the same descriptions. One is said to be suitable for Li-on batteries and is a real loss of money. The other is this one in this video that worth every cent if you decide to purchase it.

these chargers (even though they are not MPPT) are not bad at all. For most small scale applications they are even pretty damn good actually. If you have one with a temp sensor even better... PWM charging has become the bad guy in recent years but in actual fact they are still very usefull. MPPT is very nice to be able to squeeze out every last little amp from your solar setup but in reality the added efficiency does not outweigh the massive cost differences. Only in very large solar setups (3-5kWpeak solar arrays) becomes a MPPT charger into it's own but for most peoples off grid cabin, shed, RV, remote equipement (like pumps in a well or a animal feed station of sorts) and most test setups involving 1-1.5kW of solar paneling you can go for the more budget friendly PWM charging. These guys as so cheap (but not crappy or badly made) you can have one on hand in case your current one fails for some reason. In most cases failure is because of heat. The internal electronics gets hot (obviously) and needs to get rid of the heat. The back panel is supposed to provide some heat sink but this proves insufficient. To remedy this you can for one replace the back panel with aluminum plate (a bit costly and a hassle to be honest) but more effectively you can employ two aluminum pan scrubbers and some long 2 inch screws and some plastic tubing to stand off the controller from it's mounting board with the scrubbers squeezed behind them providing some added heat sink. Especially the higher current ones can even benefit from a small pc fan (which can run on the 5V usb power available from the front of the controller) If you like a larger setup you can divide up your larger solar array electrically into 2-3 chunks (simply add the max. current at the panel's maximum power together (add about 25% for some safety margin) till you hit the maximum amperage the controller can handle) can handle (this example (30A) and connect them in parallel to the same battery(bank). This is a little known fact of electrical know how but it is a very sensible way of saving money and at the same time build in some redundancy into a possibly critical system (you know you don't want the well pump to cut out because your single charge controller stopped working and now your animals are without water or the veggie garden isn't been watered. A 30A controller like this one should be about to handle 3 common available 255 Wp panels in parallel. Do not put panels in series because most of them will over voltage the controller even at moderate sun/output. 3 in parallel should work and for every 10 A of rated current you can ad another in parallel.

I just got one of these and was trying to hook it up... Didn't know why it wasn't charging and by chance after seeing you hook it up tried to hook up the PVs backwards and it worked. I'll get a better one later as I progress, as long as this works for now

There are obviously various versions of this device. The PCB on mine is very different than yours. The outside is identical. Also mine has P80NF70 MOSFETS.

I was tricked too as I bought one like this. It has even only 2 mosfets not 6 as yours. Anyway your clip is worth more than $10. Thank you.

Thanks man. I got tricked too. I just reported a whole bunch of these retailers, but I don’t think ebay gives a shit. They sell 2 wires and call it MPPT and ebay wouldn’t give a toss

It doesn’t matter whether it’s a fake mppt as long as it does what you tell it to do like setting charging voltage, discharge disconnect & discharge connect. It works with lithium too. No limit on the settings like some PWMs where they set a limit. Works fine charging my 1.8kwh li-ion battery bank.

5:51 if you use an open mesh metal pan scrubber to put behind the metal back panel (screwing it down with longer screws and maybe some plastic tubes to prevent over pressure on the back panel) you can very efficiently remove most of the heat the controller produces while operating. If you were to use a usb powered fan you can even cool the device with it's own usb power socket and really cool down the device very well... I use one in my rv van and I use two pan scrubbers (I believe they are aluminum) to draw heat away from the back panel into the metal of the van's roof structure...

Mine it has only three mosfet the first one is for the output load and the other 2 mosfet the drain is connected and the mosfet 1 is going to the negatibe input from solar and the mosfet to is connected in the negative of the battery .idont know how it works

The 2 mosfet switching load are the same product of others 6 mosfet, that is are they 64n90 ? or other models ? thanks

Load 10A es por que el controlador es de 10Amp ?

Perfect video ... very good explained . thanks.

Please let me know where you bought it

Tengo uno igual o no soporta 42 voltios del panel batería 12vol que puedo a ser ya que cuando llega a completar carga se proteje y apaga todo

Can I put my battery on series with this kind of Charge controller

These have limited mppt, not full. If you connect a 36v panel to 12v battery it will charge at double the amps of a 24v battery. A cheap pwm controller will usually shut down. This shows input voltage is more flexible, which is good. I believe up to 50v can be connected to a 12v battery which helps A LOT with getting maximum power from the panel. Hi

Спасибо за видео! Заказал такой за $10 и тоже понял сто там нет MPPT... Но выбросить жалко) Все же он заряжает неплохо... а после полной зарядки автоматически поддерживает постоянный дозаряд в 1 Ампер. Самые дешевые ШИМ так не умеют =) Так же проверял выход на питание потребителей - защита по току ЕСТЬ)

bhai mere pass yahi controller hai . usake load ke mosfet short ho chuke hai .is vajah se displayme load off hota hai ;lekin supply band nahi hota.use mosfet pe koi number nahi hai.to kay yahi mosfet hai?? aur ye kaha pe milega.pease repply i am waiting.

@ Homemade 102 Good night. Please, 1:41 are two P4 outputs? Can you tell how many amps and if there are 12 volts? The description stopped at the USB 5V sockets and did not explain the ones pointed at the cable entry.

Thank you for sharing this video

Thanks bro...Very Informative video....Thanks for shairing it.

Good video. Glad I saw it before buying. I did think they seemed to cheap for mppt

I read that they say the manufacturer company name is "MPPT", how is that for being misleading!?!

The absence of inductors does not indicate that there is no MPPT mode. This only indicates that the MOSFETs operate in linear mode (not in switching mode), and limit the current due to their resistance. Of course, this system is much less efficient, but it is cheap. MPPT may be present in this controller because it is not difficult to implement, but it is still an inefficient controller.

But you see when input voltage is 29 and output voltage is 14, it's only possible with mppt ( pwm will short circuit the voltage to battery load input ond output will be same 14v). Technically you can't denay it's not mppt, but Chinese cleverly adjusted pwm which will cut off when input voltage drops curtain voltage so multimeter can't catch

And here i am thinking why it couldnt handle my solar panels in series :D Oh well, just bought the 100 A because I could hook up a 30 A load to it. PWM or MPPT, don't care. But thank you for showing this!

Can someone tell me what microcontroller is used, and if someone can do a reverse engineering of the schematic to see if I can change the firmware of the uC and if deserve to do such changes, with an add of a coil, a diode and a capacitor maybe can be converted in pure MPPT :) I need to have measurement of input voltage and current, and battery charge voltage and current in order to do an MPPT with battery management.

mppt is the name of the supplier that’s where folks are getting mixed up. There’s several videos on RU-vid saying as much. I do use one for now but will be definitely upgrading 👍🏻.

I had one it work grate but id like to get another one cant find it now

That you so much. I was in the middle of buying 2 of these on Amazon for $28 each. I have to get MPPT only.

ihave 10amp solar charger same as that and got burn up mosfet no names on the mosfet ist p channel mosfet or n channel mosfet?

Isn't the component above the female usbs an inductor

Yeah, no way dude. It's a miracle that even something as junky as that cost as little as $10.

y&h selling these still to this day as mppt on amazon and ebay , why they not reported?

Thanks for trying with DC input but it was specified for solar,I have one of this at home the load didn't switch my led bulb completely,they trick me in buying it at higher price.

So its PMW but is it to the rated capacities like me i have 100A rated capacity do you think it can deliver 100A capability

What's the component with the yellow stripe in the video title photo? It doesn't appear in the actual video.

its like the inverters they are selling for pure sin wave but its modified

Oh thanks buddy! I've been looking for a long time to review what's inside this "MPPT". It turns out I was right, it's sad shut. They even cheated with the USB charger! MC34063 is capable of delivering a maximum of 0.75A instead of the stated 2A. Now it’s clear why, according to many customer reviews, USB goes up in smoke within the first month of use.

bagus sekali kak tutornya ilmu pengetahuan bagi kami dan membatu kami lebih mengenal peralatan listrik trimakasih /indonesia

be careful too for the "Pure sine wave inverter" from china.

this type of controller can be slightly modified to work mppt ...? any ideeia?

Your analysis is perfect. But, on the flip side, what more can you expect for 10 dollars?

but the pwm scc in the video can lower the 21v pv volt to 13 volt??

10a mppt charger 200w panel current output ?

thank you for the video , very helpfull

The price is ok for a cheap controller but not mppt. Ordering 2 to get me going for now. I have as 2500 watt array to hook up that I got super cheap.

Kapasitor milar yg biru disamping terminal ukuran brp ya bos

whats about the two hollow plugs ?????????????????????????????????????????????????????????

Swamp land: $10. How many acres you want?

That temperature sensor, is it a PTC? Do you have any idea? Thanks 🙂

at 1:40 you pointed at the 2 ports. These were the only two that you made no mention of what they are for. Do you know what these two ports re for as there is no mention in the instruction that came with the controller.

Thanks for the video

Maybe MPPT stands for Most Portable Panel Technology to them 😂😂😂

So it's still better than standard PWM solar controllers?

Can i have it my controller is pwm but only 20a

Good job now i can make it mayself. Thanks

I just ordered one from eBay 100A, don’t know how it going , it’s cheap price .

Thanks for sharing

These things are all over Amazon. I thought it was too good to be true! Good thing I checked here.

im alvin from philippines, i jusr bought like that 5 days ago. i bought it coz lazada browser its mppt. ₱1,328. why they need to lie just to get sell.

hướng dẫn chi tiết quấn biến 2kv làm inverter đi ông

Super bro thank you

thank's for info

Should be labelled MuPPeT charger. Someone in a Chinese factory must have thought, if we write mppt on it, we sell more. Can't fault their logic really 😅❤️👍😎

I got the same, so... this isn't a mppt?

Hi. Thanks for the video. I bought one. Can you please tell me what that b01, b02, b03 and b04 stand for? I have a lead acid sealed battery. I connected it to a 320w efficient solar panel I draw about 6amp maximum and when the battery is charged the volt goes up to 17v. This is dangerous No? I know it is fake but it is cheap :)

Aku punya tpi inputnya sama outputnya sama volnya apa rusak ya

V. Informative

Thank you! I was about to buy one. Saved me a few dollars!

Oh no. ! t.y for the info

Thanks for the video, i almost buy it. And now i change my mind.

I bought one in China and it still hasn't arrived. Too bad I haven't seen this video before!

Thank you…

Really this helps me, I'm going to buy this same from online, really then why they are writing mppt

There are 2 connectors for what?

que significa el pv que sale en el dibujo de la placa

thanks for the reveal.

Sir I have this charge controller.and it's load MOSFET is short.64n90 is not available in my area.can i use any other MOSFET. Please help.

Muito bom abençoado esse vídeo

Do not master English and use Google Translate I bought this organizer from an online shopping site and mppt says they are not honest about it. I have a question It is on the PWM system but do you recommend using it or stop it Do you give voltages and amps inside and outside properly or lied What are its risks and disadvantages as quality It cost me around $ 25 I have another type with aluminum cover

Is this MPPT or PWM? Pls confirm that Voltage is constant while current will not be constant? Also while charging mobile, USB voltage should be constant.Other wise danger to mobile.

Glad I saw this video.. i almost Buy one

อยากได้ครั้บผมราคาเท่าไร่

But are these good being PWM controllers? For that low price*

It’s $10. That’s a fantastic deal PWM or MPPT.

Comprei um desse mas já imaginava q não era mppt muito barato

That label is absolutely fake, the charge controller is pwm, no MPPT , you can see inside the box components transistor mosfet and the others that are missing. Thanks for sharing

What you paid then what you got

You can make it plz make diy projects

mine is 100A.

Waiting for your mppt design

its not mppt controller... its pwm

Please your mppt charger desgin

Actually there is an inductor... for the USB power supply. Yep, you got done.

just bought a similar one from amazon.ca under Prime selection for CAD $10. works well but not real MPPT. No idea why amazon.ca allow this fake product enter Prime selection.

Che significato c'è nel distruggere tutto

gan scc saya gambar panel nya ada tap saya tes pake amper meter gak keluar arus nya,kira2 apa nya yang rusak.?

Gracias por el video! Lastima q ya me lo compre 😅

The price told you it was not a MPPT.