6x12 cell Panels? ~37V Vmp?

JiminDenver wrote:
You don't just match up the ratings, you have to match up the characteristics too. Mono's and Poly's react differently to different light levels and that will confuse the controllers ability to track.

I have found this in my original panels, a 220w mono and 230w poly. They were never at the same no matter the light level. My 245w mono and 250w poly were close in bright light but vastly different when that light changed. So if you can't match them up, do dual systems.

That's why I suggest to cover the roof at the get go. I would have been happy to use my 230w Schott poly for it's low light abilities but they were discontinued years ago. Newer polys have a smaller foot print and that made it easier and cheaper to start fresh with three matching panels than finding two panels that matched up with the Schott.

It is far easier to add to a PWM system even though you lose a good chuck of power when the batteries voltage is low.

Good advice; I should have bought the 3rd 195W panel at the get-go.

But an issue with adding a separate PWM (or any) controller is the additional cabling and mess on the roof and down to the batteries. Yuk, more wires/cables/junctions I don't need. Was hoping to just pop open a couple of MC4 connectors and add a couple of Ys on the roof.

I have found a 72 cell mono with basically the same Vmp that should match the existing 72 cell mono panels well. But it's a much bigger, more expensive 320W panel that in combination with my other two 195W panels will surely be wasted on my 30A max Rogue, unless I switch to a 24V Battery bank with a DC/DC converter. :E

Yikes, this is getting out of hand. Time to put it all on the back burner for a bit while I mull it over some more.