Is my MPPT CC killing my 12V AGM battery at 16V?

[PNPmacnab]

Really appreciate those pictures. I've wondered what those controllers had inside.

[Mike90250]

Well, it looks like it's a legit MPPT controller. I guess you have to report back to us, as to how well it works

Edit - the EPSolar Tracer 2215bn spec looks like it might be MPPT. the only pics I've seen were of the Bogus controller

[PNPmacnab]

I fail to see anything in this that would make this a MPPT controller except in wind turbine use. I do like the external current carrying bars to the FETs rather than relying on copper foil with built up solder. Great picture quality. I appreciate those who can take a good photo. I do think the controller is somehow to blame.

[inetdog]

Well, it looks like it's a legit MPPT controller. I guess you have to report back to us, as to how well it works

Is this based on direct manufacturer information?
Or the posted specs?:

"Then I took a look at the specs of the Controller:
Maximum Power Current: 30A
System Load loss: < 13mA
Loop Buck: < 100mV
Battery Float Voltage: 13.8V
Discharge Stop: 10.6V
Discharge Resume: 12.6V
Temperature compensation: -4mV/Cell/˚C
Solar panels maximum open circuit voltage: < 48V
Peak power of solar panel: 380W"

The 48V input and up to 380W panel power with 30A nominal 12 output are all consistent enough, but unless they use a really high frequency and some of what appear to be resistors are really inductors, I just do not see support for that in the photo. Of course we can't see what is between the circuit board and the heat sink either....

[Mike90250]

Edit - the EPSolar Tracer 2215bn spec looks like it might be MPPT. the only pics I've seen were of the Bogus controller

[boatmaster]

Of course we can't see what is between the circuit board and the heat sink either....

Well, now we can, since I took a little further apart:

1.JPG

2.JPG


@Mike90250: I havn't received the EPSolar Tracer 2215bn yet, but will post the "insights" asap.

[PNPmacnab]

Need I say more, I'll leave that to others. Firm believer in they always shoot the messenger.

I'd love one that is damaged and out of warranty.

[boatmaster]

I just got the 2215BN today and it totally solves my problem. It might be one or two sizes to big for my setup, but this way i can put up another 13 panels when I need more power down the stream. For those who are interested in what it looks like on the inside, I made some photos. It is actually a lot bigger and heavier (1.5kg), than I thought.


2215BN-3.JPG

2215BN-2.JPG

2215BN-1.JPG

[inetdog]

Interesting pictures, thank you.

The contents of the black potting at the top of one photo appears, from surface irregularities, to be two toroidal coils, a good indicator of true MPPT.
But the input side working range from 8-32V is hard to understand.
It may be able to withstand an input Voc from panel string of 150V, but if the MPPT range peaks out at 32V it is not clear how useful the unit really is.
I hope that that is just a misleading printed spec.

[PNPmacnab]

I think the 8-32 is the battery side limits. Below 8V (at night) there isn't enough voltage to run the internal electronics and above 32V from an external source like another controller could damage it..

[inetdog]

I think the 8-32 is the battery side limits. Below 8V (at night) there isn't enough voltage to run the internal electronics and above 32V from an external source like another controller could damage it..

Probably, but the spec is found grouped with clear input specifications on the input side of the label, not the output side.