Little confused, 12v vs. 24v solar

phemens wrote:
I've got an existing 12v solar array with 1x 130 Watt and 2x 80 Watt for a total of 290 watts @ 12v, fed to a 30 amp MPPT controller (Rogue MPT-3024). I bought what I thought was going to be a 200 watt 12v panel to bring me to a total of 490 watts, which is the limit for that controller.
However, the panel they shipped me is a 250 watt 24v panel. Before I go back to them to request they swap it, is there any advantage in keeping it, and using it with the 2 x 80 watt panels wired in series? This would give me 320 watts at 24V, this is where I get confused - does that give me the equivalent of 640 watts @ 12v? The controller can either 12v or 24, I think it caps out at 418 watts @ 24v to a 12v battery bank.
If I really get 640 watts to the battery, I can take the unused 130v panel and give it to my dad.

Thanks

I would advise you to "look into miss matching panels with a MPPT controller" Do your homework. If you do not your charge controller may end up being less efficient then a PWM controller.

Good luck with your project!