MPT-7210A Questions

Announcement - Help us fight the BOTS! Please report all spam including stuff in your inbox!

xhamma

New member
Joined
Nov 18, 2018
Messages
1
Has anyone probed the serial port on the MPT-7210A? I did a quick google search and was surprised that I didn't find anything.
 

camolas

New member
Joined
Jul 23, 2019
Messages
1
Hi all, my lcd is all white (only backlight is showing) afther a small electric discharge from my body i feel a small discharg on my finger when i was to push one of the7210A buttons... thenwhite screen :(i went to ebay and bought this1.8 Inch 128 x 160 Serial Spi Tft Color Lcd Module 128X160 Display St7735 W W8V3. But is still getting thewhite screen:(the7210A is working i can read 25v from a 12.5 input.
If any one can hellp me please..
Thanks
 

saslava3d

New member
Joined
Jul 23, 2019
Messages
1
thanar said:
>I also believe these units are quite good for their price, give lots of control over the charging parameters and can
>be used as DC-DC boost converters reliably. However, a 100Wp panel is the minimum (says so in the chenglish
>manual), the tracker just doesn't work right under a smaller panel.

I didn't find that clause in the manual when I researched it, and mistakenly assumed that the unit itself would not consume even 10W... my 20W panel in full sun *does* boot it up correctly but once I try to draw any power to charging a battery, it goes flaky as reported here by others.

I was hoping I could get a small trickle out of this unit into my 36V bicycle pack... but it looks like the fan/display/losses consumes too much to function correctly...

I can put it to use other ways, so it isn't a total loss... but I'm looking for a good and inexpensive way to slow-charge/maintain my bicycle pack with solar...
 

jon218white

Member
Joined
Jul 18, 2019
Messages
135
Hi
Im concidering getting one of these not sure now, is this an isolated incident?
 

jdeadman

Member
Joined
Mar 28, 2017
Messages
948
mines been running for 2 years with little problems. The biggest thing you have to know about these is that they are Boost Only charge controllers Your solar in has to be lower than the min of your battery. I have 12V Panels and charging a 7s (24V ) system.
 

jon218white

Member
Joined
Jul 18, 2019
Messages
135
Yes buck boost soppose they are less efficient.
 

daromer

Moderator
Joined
Oct 8, 2016
Messages
5,659
And they Arent mppt. They are manual ppt and not automatic. They work but yeah you get what you pay for
 

rev0

Member
Joined
Oct 3, 2017
Messages
369
We just need someone to do a brain transplant on it to make better use of the hardware. I've already worked out most of the power path components/functionality.
 

Alexander9000

New member
Joined
Oct 1, 2021
Messages
3
Here's some scribbles about the circuit diagram ifanyone is interested, I only bothered with the main power path so I can add a loggerand some bits trying to figure out what was wrong with the fan:


View attachment 2046


The shunt before the battery outputis approximately 10mOhms, whichgave me 9.64mV/A at 2A load.
Hello. I saw your post with a schematic drawing from a solar mpt 7210a device. You drew an approximate diagram according to which it operates this device. Could you help me and tell me what the name of this glass part is? I have it broken. I want to replace it, I don’t know what it is? I will be very grateful if you help me
 

Attachments

  • IMG_20211001_125441.jpg
    IMG_20211001_125441.jpg
    3.2 MB · Views: 15
  • IMG_20211001_130417.jpg
    IMG_20211001_130417.jpg
    4.5 MB · Views: 14

Oberfail

Member
Joined
Jun 22, 2021
Messages
61
D is commonly used for Diode, just google for glass diode, i dont know the parts number tho or the exact values it needs.
 

rev0

Member
Joined
Oct 3, 2017
Messages
369
Hello. I saw your post with a schematic drawing from a solar mpt 7210a device. You drew an approximate diagram according to which it operates this device. Could you help me and tell me what the name of this glass part is? I have it broken. I want to replace it, I don’t know what it is? I will be very grateful if you help me
It is just a simple diode, any will likely work, here's the likely part: https://www.mouser.com/ProductDetail/Microchip-Technology/1N4148UR-1?qs=%2BRKXB2WKlSdXiNZTe6I9fg==

You should be able to replace with any silicon diode with similar voltage/current rating.
 

Alexander9000

New member
Joined
Oct 1, 2021
Messages
3

rev0

Member
Joined
Oct 3, 2017
Messages
369
Thanks. yes I figured it out a little. it remains to understand what kind of diode it is? how many amperes? and how many volts? I think this is a 100 volt diode? ampere?
I'm just assuming it's around 200-500mA based on the package, the glass packages aren't used for high power diodes. I'm sure using a 1N4002 (1A 100V) or higher voltage versions (1N4003-1N4007) diode that is easy to buy/scavenge would work also.
 

Attachments

  • Screenshot_20211002-034212.png
    Screenshot_20211002-034212.png
    886.7 KB · Views: 12
Top