I recently acquired twenty 240w 36v panels. I'm splitting them into two runs and I'm trying to calculate which charge controller I should use. I know I'll need two controllers so I'm just focusing on half of the panels for now. I heard that it's simply dividing your total watts by the battery voltage but that seems so excessive to me. 10 panels would be 2400 watts and I'm using a 24 volt battery so that means I'll need two 100 amp controllers for my system?

I mean, most controllers only handle 100 - 150 volts so I plan on running the 10 panels for each side in 5 parallel pairs giving me 72 volts and 40 amps (8 amps per panel). Couldn't I use a 50 amp controller per side or do I need to bite the bullet and get a couple of 100 amps?

Thank you