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Is this boost or buck converter

You can limit the power in from your solar pannel to 12v

It's possible to combine this with step down buck converter for 12v. People say you should cut the fan cover and flip the fan to make it more quiet. Many people also say that the fan adjustment is working on some of them, but not for others.

Please point me to the common 50 Amp diodes on ebay! There is no such thing! There are 50V / 10 Amp, you might get 30 Amp, but 50 amp.....are you sure, I have never seen them a a single package, only as a recrifier.

Your review is spot on. I wish you could have identified the power gates and did a current test. I have 2 of these units just recently purchased. one of them will not output more than 3 amps on a 28 volt setting inputting from a 12 volt 21 amp supply. The other one instantly melted the solder trace from the T3 transistor to the R13 current sensor as soon as it was connected to the battery. I Because i did not see any certification markings anywhere on the device, i would not recommend this item for sale to the general end user. If the manufacturing company would put just a little bit revisions into this unit they would have a really competitive product. Just my opinion...

Hola, mpt 7210 sirve para cargar una batería de litio de 36v 12,8Ah con una placa solar de 12/24V de 160W??? muchas gracias

That Power Supply Turns on Because Unlike Linear Power Supplies That uses 110-120Volts AC too 220-240Volts AC too power Everything in it Your Power Supply is not Linear and It uses the Output too power the Panel and Since it uses the Output it Turns on when an DC is put into the Output if you used a High Current Linear Not Switching Power Supply that uses the AC too Power the Panel Display it will NOT Turn on for it will not like the Electricity go Pass the Bridge Rectifier it will not make AC and it will not Turn your DC Power into AC Power and it will not Power up the Display for the Display of a Linear Power Supply for the Display will not Run on DC it only Runs on AC so hooking up a DC too the output of a Linear Power Supply will do NOTHING

thank you for your video it makes sense, however it is the 3rd video I have seen and it is a third and a bit different way to do it, ha ha

CAN I USE 3.7 VOLT 10000 MAH LIPO BATTERY IN LIUE OF 3.7 VOLT 3000 MAH LIPO BATTERY (DEFAULT) IN MY TAB WITHOUT ANY HAZARD/DAMAGE?

mine short circuited and my tab died

My bench power supply has max output volts to 17V And 2A Im trying to charge a 12V car batt lead acid When i connect the psu to batt the psu drops to 11.5 V??? And fluctuating (11.1V-12v) And amp fluctuate (0.00 to 2.99) What is wrong here?

How is your battery backup now?

drunken tech rambling

drunken tech rambling

Thank you so much, glad I found this one after watching a couple of others this made it much clearer what was going on with this unit. I have things configured correctly now and my 2 20 volt panels are in parallel charging a 24 volt battery Bank.

Junk video.

I slowly begin to understand what these units do and what to use it for. I own a big UPS Server Backup Power Rack wit 8 old 12v-7A LA batteries arranged to be 48v (84Wh), i can replace them with a 13S Li-Ion Pack + BMS and charge it correctly with a 100-200 Watt 12v-24v Solar Panel. This way you can charge and discharge a 13S battery to run the 1600 Watt Inverter to use 220v stuff for a longer time if needed. The output current is rated (Fuse) at 100 amps, so BMS and wires have to be thick.

Can a small battery power a tablet

Serious, don't ever mix two different formats and capacities of batteries like this. It could literally go up in flames.

thanks, this solves a big problem

Super helpful, thanks.

It's giving battery issue for my tab. Some kind of warning icon

would yo do a video about your power suppply?

nice power supply

you really should be using batteries with the same chemistry or at least ones that have the same charge voltage. lithium batteries used in phones and tablets usually charge up to 4.4volts while that 18650 can only handle 4.2.

Get off unprofessional

It was looking like a good deal to charge my 48v pack from my two 100w solar panels, but manually having to start it is a deal breaker. I wan the thing to start charging the moment the sunlight is bright enough to start generating power.

Very good explained sir thank you

Super.

Super. Pls give me a schemeof a your power source..ThankYou.

How many amps should i be using on why am i getting 0?

can you overcharge a lead acid battery?

고맙습니다~~~!!!!

@GreenCave - at 1:39, I think you mean the minimum voltage of the batteries, not maximum.

I have 2 solars on the roof of my motorhome Kyocera 2x120W KC 120-1 Details Maximum Power 120 W Maximum Power Voltage 16.9 V Maximum Power Current 7.1 A Open Circuit Voltage 21.5 V Short Circuit Current 7.45 A and the MPPT controller that loads two batteries from these two panels in series to give a 12V output. Can I use this controller to recharge these batteries. What voltage should I set for charging?

how long did this last and was their any accident? are you alife? this is 2020 going on....i am anxious of your reply in 2020 i saw your video today..

They arent the same capacity, its gonna a ruine both batteries and probably leak acid all over with potential fire

Can you exchange the LCD screen in case its broken? Or do you need to replace the whole controller?

Great, just what i need. to charge my 52ah 60V 6700w scooter. 3 of them in combination with 3x 300wp solarpanels schould do the job.

So, if I understand correctly - you are saying I can charge my 48v, 17.5Ah Li-ion ebike battery with this device and a 20watt solar panel? If so, that's exactly what I need for long distance ebike touring. Please advise. Can I then perhaps connect this unit via a converter to charge USB items, i.e., phone, etc. Please advise. Thanks.

if you compensate for a diode forward voltage, than as battery gets charged current drops so does diode forward voltage and you will have a voltage from your charger higher then what you was aiming for. just don't increase charging voltage above 2.4v/cell even knowing that diode is going to drop a few mV. Use shottky diode to half the drop. And if you really want to compensate for diode drop, than you should move the feedback circuit connection point between the diode and load. In other words, it would require power supply customization.

Will this charge 'under', the 100amp? I have four 18v 2.5amp panels on the way and was wondering if i wire then in series will they be 'seen', by this?

U need to pass rated current through that diode to measure its forward voltage or in your case you should measure it on circuit.

Can I use a 36v solar panel with a 24v battery pack with this mppt controller?

48v battery with one 12v 325w solar panel

hi @greencave, I have oppo r1x/r8206 that has a builtin battery(blp587) and would like to double its capacity like you did but I have bought different type of builtin battery(blp577) and or make the blp577 compatible to my oppo r1x/r8206, what should I do? thanks in advance

I have several of these. They would be accurately described as "programmable charge pumps" which is how I use them to charge LiFePO4 packs.

I have a tablet and i have to do that too.. Because the battery of my tab. Is damage so i want to change it.. (Same battery with you use) I have a power bank so i will cut USB port cord direct to the tablet..

The diode It is 10amp 50v??? Because this diode 50amp, don't exist

For people that want to use this to charge a 12V battery, it is not really designed for that. However, suppose you had one large 12V battery you wanted to charge with this controller. Why not just add 3 small cheap 12Ah "scooter" batteries to make it a 48V system, but put a load on the 36V such as a 36V input inverter to "burn off" the extra charge the batteries cannot handle? Perhaps run a box fan or some other reasonable load from the 36V setup. When there is no solar (like at night), you could turn off the load on the small 36V subbank of batteries but continue to use the load on the large 12V battery (in moderation of course). Personally, I much prefer a matched set of large 12V batteries making it 48V and I run a 1600W max sine wave output inverter and I use this solar charge controller set at 40.0V Vmpp and 54V maximum charge voltage. It seems to work fairly well.