MPPT controllers

[glock15]

After reading a little about the Mppt controllers I understand that excess voltage is turned into current at the controller. But dose that also give me the ability to run my panels in series creating 40 or 60 volts and then having the volts converted to amps for 12 volt system at the controller. If so is there a downside to doing so? the obvious up side being running a lighter wire size and less loss of power in wiring.

[Mike90250]

You nailed it ! go to the head of the class.

[Sunking]

Pretty much on point.

[Chanz]

I have question about MPPT controllers that most of them they take up to 40v. 12v solar panel have open voltage of 21.6. when connecting 2 panels in series will produce 43.3v. Will that damage the controller in any way will that affect charging 12 battery under full sun?

[Sunking]

I have question about MPPT controllers that most of them they take up to 40v.

Maybe some inexpensive off brands, but most up around 150 volts Voc

[Mike90250]

...... 43.3v. Will that damage the controller in any way will that affect charging 12 battery under full sun?

Best to follow the directions the mfg gives, if they say 40V, and you fry the controller with 43.3V, then it likely won't charge the battery anymore.

There are some good , small amp controllers, Morningstar 15A MPPT, Rogue MPPT, Blue Sky MPPT that have varied input voltages. When you get to the higher amp controllers, 45, 60, 80A, then you have higher voltage DC inputs.