good evening everyone. I'm running into this issue with my 2004 g35x sedan where I'll get in the car, turn the key to the ON position, and all the dash lights will come on, headlamps work, even my stereo comes on. When I go to the start position everything completely turns off dash lights, stereo, headlamps wont turn on. I just replaced the battery with a brand new one. There's no noise from the starter indicating a failed solenoid or something. I'm thinking it could be the alternator not holding enough charge to fully juice the battery? I replaced it sometime in 2023, and the car drove amazing until it started getting really cold and I don't have the garage space to put it in.

If you guys know of anything please feel free to give me some knowledge!
thank you.