Gday. Mate it is the wrong controller for what you want to do its a voltage booster ... their for changing high voltage batteries....not for 12 volt batteries....
Hi why are you packs got 21 cells in series , though u said was a 48v system. 21x4.2v =88.2v / 21x3.6v =75.6v How’s us system runs at 48v ifs ur packs are at this volts ?
Making use of the ru-vid.comUgkxcJ22tnHH9l1vjdIdEIG27iOG55P7LXI8 reconditioning plan, I just saved 2 auto batteries from being completely junked. The guides were very simple to follow. I wish I would have found this years ago! You may use the guide to recondition any battery type
I have three of these controllers and have failed to get any of them to actually control the current at any settings. They even pass their own maximum setting and have seen them at 13.2amp 26v. I have blown numerous 10amp fuses between the panel and controller and would like your opinion on whether you feel the controllers could handle 15 amps.
so whay couldnt you just add a capcitor pack inline between the controller and the charge controller to act as a buffer which is my understanding kinda what you did by modifying the controller?
This is exactly the video I was searching for. I want to use the same (rather cheap) step up charge controller for my 57.7Vmp/72.8Voc panels. So it seems that the 60V isn't a hard stop. I just will drive the controller even a bit more to the extreme as I will have 6 of these 80W panels in parallel. Thanks !
I have a 2100sq ft house in Michigan. USA. I have 20kwh and I maintain at minimum 900 watt load all night. My battery is almost dead by morning. I have another 50kw I'm about to add. I do have electric oven/stove, 2 large deep freezers, two full size refrigerators, 2 dehumidifiers, all led lights, wife uses electric blanket, two furnaces/ac units. Outdoor HVAC unit is on grid but blowers are on solar. 12.2 kw panels. 6 kw inverter. My batteries are usually fully charged by mid day even in October so far. We'll see how it goes this winter with all the overcast
I've heard that sometimes when you extend the leads for the metering CT.. it can lead to inaccuracies... can you elaborate on if you've observed this and how far you have it extended it?
How easy are these to install? I have a replacement for a faulty one (exact same version) and wondering if its something a professional needs to do and if so how much should i expect to pay?
PC case fans tend to be 12V and silent, so you can very easily replace the noisy 7210a fan with any of those. It doesn't even have to be the same size. Remove the original fan panel, attach the new fan with one screw from one corner, and if the others don't align it doesn't matter. I'm of course assuming the setup doesn't move around (solar panel setups generally don't). You can put a rubber band around the unit if you want the fan to be tighter (optional). PC case fans are 3 or 4 pin, but you only need to connect the red and black. Easiest way is to use the original fan's connector and solder (or even just tape) the wires together. Better airflow and no more noise. :)
Interesting you could get 5A charging current boosting from 60V to 80V -- I tried the same setup on my unit and only got max of 2.5A! What a strange device. I just wrote a blog post trying to map out the charging current ability vs input/output voltage.
This video only confirms why I unsubbed..... No more updates/vlogs on how things are progressing.... it was nice to have been a viewer when the install first started.... it's unfortunate Mike... hope you're still charging safely somewhere.
Thanks for pointing out the capacitor mods. Much appreciated... 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...
Using the MPT-7210A, how do you prevent it from over-charging batteries? It does not have a low-current shutoff that I can find. There is a time limit feature, but then it may not charge the batteries fully.
Hi I have one of theses to charge a ebike battery but I have a quick question for thoses days when solar is bad ie cloudy. Can I just connect the mpt controller to a 12v battery to charge the 36v battery.
You have your batteries hooked to your Tie grid right so look at this and tell me if you can follow along what's actually going on we're using it in our system and if you don't know what overunity is it's just leapfrogging to fresh batteries while the batteries are charging if the batteries are full it doesn't take much energy to charge the batteries and as you jump to battery and batteries the speed determines on how long of charge it will take to charge them back up you only need a second of energy from the batteries which will give you full power and like an uninterruptable power supply switching can be done flawlessly and as you can see the batteries hold the storage and will give you the amount of power you need in your system indefinitely we're writing a book on this so check out this link ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YYW2-VIBxW4.html
I use one of those FOTEK solid state relays, albiet with a different heatsink to yours, it pulses my hotwater element (from 160W to 3600W), sometimes it fully on depending on my solar export, using an ESP8266, it only ever gets mildly warm. I think your heatsink is the problem or you probably have a fake 40amp unit and it uses way less then all those relays and power pack, thanks for all the great videos
so one of my units stopped charging the other day it does not detect / measure the input "solar voltage" correctly . I cant see anything really wrong with it visually inside . any ideas what would cause it not to read the solar voltage ?
