Two controllers on the same array to the same battery pack?

[CountryFit]

so you know my controller is hitting 96a everyday.  a big chunk is wasted:

http://www.irv2.com/forums/attachment.php?attachmentid=200937&d=1525036633

[ClassicCrazy]

Not really wasted - just not used.

Larry

[CountryFit]

roflmao... is there a real difference? 

[ClassicCrazy]

I have more power than I can use  - once the batteries are full then no more comes in. There is no extra heat generated in the controller or anything once it goes to Float.  Since I don't have a use for the extra power it just doesn't do anything. I don't think of that as wasted. I think of wasting power if I had a controller and inverter that were like 50% efficient and what comes in half of it goes to heat in the device. And even that wouldn't be wasted if I was heating the space with electricity anyway - but you get what I mean. 

Guess I don't view every potential electron out there in the PV panels that I don't use as a waste.  I oversize my system in the north here so that on cloudy days and in the short days of winter I still make enough power to get by.  Cuts down on running a generator.

Larry

[KyleM]

Wish more people were like you Larry.



Kyle

[CountryFit]

thank you all who answered my questions and shared your knowledge.  this is a great experience, i really appreciate it!

[ClassicCrazy]

Let us know what you end up doing - will be interesting to see your solution .

Larry

[CountryFit]

the arrary in question consists of 8  250w panels on 6ga wires.  another array has 3 250w panels in series with much thinner wires, 14ga.  i am inclined to move 1 panel from the first array to the second, but i'd need to replace that 175v 60a controller to 200v, like classic 200 (or move 2 over and replace the controller to 250).  this should resolve the issue.

big thanks larry!!

[ClassicCrazy]

Okay - I don't get it now - your photo showed 42v input charging 12v batteries .
What voltage do you have your panels wired up at ?

Larry

[CountryFit]

array1 (8 panels in parallel) outputs 48 Voc and 42 Vmp.
array2 (3 panels in series) outputs 144 Voc and 126 Vmp.

[ClassicCrazy]

so you have two controllers now ?

[CountryFit]

yes