MPPT Controller

[Naptown]

Input 2 collectors in series.
The output amps should be a bit less than double the Imp of a single panel. If the same it is PWM

[tonys681]

Forgive my ignorance what does "Imp" stand for

[SunEagle]

Forgive my ignorance what does "Imp" stand for

That is the amount of current or amps at Max Power output of the panel.

[Mike90250]

If you examine the link that i posted previously you will see from the photos of the controller innards that there is a fan, and the heatsink is a reasonable size within. I am not an expert but can anyone say with certainty that it is not a MPPT controller. The problem i have is that i live in Brisbane Australia and the daily temperature is between 28 and 35 degrees C so i guess this will have an effect. Just to get into the controller i had to drill out the security screws (not easy) to change a jumper to reflect gell cell batteries, not user friendly

With the fan, and the SMALL air holes, that might manage 25amps. But the size of the air holes and location of the heatsink, not in the main air path, would not lend me to believe this could live for long at 40 amps.
And if it has metering built in, hook up a high voltage, low amp panel, and see what comes out

NOTE - you generally must connect MPPT controllers to a battery first, and after they boot up, then you can connect the PV panel.

Mike

[tonys681]

There was nothing in the instruction manual to say what order the connection had to be. In order to test the controller i connected up the unit solar input first,battery output second and load third. It appeared to be working but i then saw that the battery was fully charged so i decided to disconnect the solar input, turn on a fridge drawing approx 2.5amps and reduce the battery to about 11.8 to 12 volts. When i disconnected the solar the readings were as follows solar input 0.2amps 6.1 vdc with output showing 0.1amp 12.3vdc. I have attached photo. I would have thought that solar input should show zero. Have i done something wrong in my ignorance ?.15-10-1.jpg

[tonys681]

Hi there, I have done a liitle more digging on this controller and i beleive it may have a hybrid circuit in it called "fungpusun Atonic" is there anyone out there who can enlighten me on the capabilities of this type of system. Will it in fact do the same job as a true MPPT ?

[tonys681]

Hi there, I have done a liitle more digging on this controller and i beleive it may have a hybrid circuit in it called "fungpusun Atonic" is there anyone out there who can enlighten me on the capabilities of this type of system. Will it in fact do the same job as a true MPPT ?

Sorry i should have said Fangpusun Atonic

[tonys681]

I have tried today to do a little test om alleged MPPT controller. What i have done is discharge my batteries down to about 12 volts and then attached a watt meter between the solar panels and the controller. It is a warm sunny day here in Brisbane Australia with the outside shade temperature at 31.5 degrees C at 1.00pm. I started the test at 7.00am this morning and have tabulated the results in an excel spreadsheet. I would appreciate any comments as to whether the results imply that my controller is MPPT or otherwise.

Watt meter Solar Input Output
Time volt amp watts volt amp watts volt amp watts battery led

7am 12.41 1.04 12.9 12.3 1.1 13.53 12.3 0.1 1.23 low
7.15 12.9 3.55 45.9 12.9 3.7 47.73 12.9 0.9 11.61 normal
7.45 13.52 5.06 68.4 13.5 5.3 71.55 13.3 0.8 10.64 normal
8.05 14.22 9.7 138.5 13.9 10.1 140.39 13.9 1.2 16.68 full
8.3 14.43 10.96 158.2 14.3 11.3 161.59 14.1 1.4 19.74 full
9.00 14.9 11.96 176.4 14.3 12.4 177.32 14.3 1.4 20.02 full

battery rested 1 hour at end of hour voltage 12.3 VDC

10.00 15.3 11.42 183 14.8 14.3 211.64 14.3 1.5 21.45 full
10.30 16.5 9.9 161 16 12.2 195.2 14 1.2 16.8 full
11.30 14.19 9.7 165 17.5 16.1 281.75 13.9 1.2 16.68 full
12.00 16.6 8.7 148 16.1 9.8 157.78 13.7 0.9 12.33 full
0 0
battery rested 1 hour at end of hour voltage 12.5 VDC `

1.00pm 17.7 3.98 72 see below see below 12.7 0.2 2.54






solar input fluctuating wildly , voltage 16.2 to 19.0 and current 0.2 to 11.7

Any help would be appreciated

[tonys681]

Sorry my figures did not go too well not sure if i can copy a file to the forum. essenially the first three figures are the wattmeter, the next three are solar input and the last three output to battery

[s2man]

Tony, I've got to agree with one of the first replies; Get a meter and measure what's going into your charge controller, and what's going out.

[PNjunction]

Can you save this controller for another day, and just get a reputable one from a reputable dealer and remove all doubt?

[tonys681]

I did put a meter on what was going into the controller. The first three columns show a watt meter volts,amps, and watts going from the solar panel to the controller. I would like to know if anyone can determine from the figures if it is an MPPT controller

[tonys681]

I have a question. If the current on the controller display is generally larger than the current shown on a watt meter that is placed between the panels and the controller does this imply MPPT???

[inetdog]

Sorry my figures did not go too well not sure if i can copy a file to the forum. essenially the first three figures are the wattmeter, the next three are solar input and the last three output to battery

Best thing you can do, short of putting a link to a document hosted somewhere else or attaching as an image or a pdf is to use the CODE tag (# button in formatting toolbar). It is still a lot of work to line it all up as text, but if you put in the time to get it right it should look OK on all browsers.

Watt meter Solar Input Output
Time   volt    amp   watts   volt   amp   watts   volt   amp   watts   battery led

7am    12.41   1.04  12.9    12.3   1.1   13.53   12.3   0.1   1.23      low
7.15   12.9    3.55  45.9    12.9   3.7   47.73   12.9   0.9  11.61      normal
...
...
...

[tonys681]

Thank you for that valuable advice, I will try it