Confusing the MPPT controller
Here I go with my ignorant self again, seeing something and thinking I can figure it out. ;) When I first got my original panels I talked to quite a few people including Mark at Rogue saying to run...
Forum Discussion
JiminDenver wrote:
...
For me it's understanding what would have been had I followed the advice I was given three years ago. I would consider the person that owns the company that developed three MPPT controllers and discusses them in depth to be more than just some person. My mistake I guess. Lol
When I added another parallel panel I followed your advice and this advice from the Rogue manual:
Although the individual PV modules of an array need not necessarily be of the same make or model, you will
achieve better tracking performance from an array in which all of the modules have the same maximum
power point (V mp ). This is best accomplished by choosing modules of the same make and model. Even if
modules are not identical, be sure that they each have the same number of cells. While it is possible to wire
modules together with varying numbers of cells, this will degrade the output of the entire array.
So I matched mono to mono, # and config of cells, and got within a few tenths of a volt Vmp. It wasn't easy to find the right panel, but I got lucky and only paid Can$1 per watt.
But haven't had the sun or loads to really challenge the array yet. So ...
