Originally Posted by mserafi1
The wire is not shielded or twisted; just ordinary red and black wire. So, it looks like I can just lengthen it with a length of similar marine
grade wire of the same gauge . Thanks for the help.
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I'm almost positive the other guys are right and you have a thermistor. You can simply extend the wires, but according to the instructions from a different controller, they stated that the extension wires had to be equal length.
In regards to your Tracer 4215, after you get it installed, keep an eye on it as far as output goes. I bought a Tracer 4210 (similar, just 100v Max input instead of 150v) and I was very disappointed in it's inability to lock onto MPP. A good performing MPPT
controller should determine the correct V in a matter of a few seconds and make max power, readjusting periodically as shadows pass over the panel.
My unit performed exactly like the video I saw on Youtube, where it took a long time searching but never really settling on the correct voltage, wasting a lot of power by being either above or below the MPP. I didn't feel it was working well enough to install it, so I'm using it as a paper weight. It's been posted that the mfr has claimed they would update the firmware, but so far, no good news.
I have a very strong suspicion that the engineer
they hired to design it and/or write the firmware doesn't really know what he's doing. I've worked with a few engineers in my time, and most of them were great at designing whatever it was we were working on, firmware updates were for minor glitches or slight tweaks to refresh rates or responsiveness, etc. This is an all out failure of the algorithm to determine MPP, which (should be) actually a pretty simple comparator process. As I'm fond of saying, just because someone has the job doesn't mean they're the best at it, or even competent.
I'm hoping to hear back from you to see if perhaps yours is working correctly, maybe they quietly fixed it. Good luck!