@substack those look like regular AC light switches.. Which are typically rated for 15 amps, or 1650 watts.
At 12 volts DC though, only 150-180 watts is safe before you reach the max amp rating and then the switch might fail in some interesting way. Probably ok for laptops etc (likely charge well under 100 watts), but you'd not want to run an inverter or larger load through those switches.
What this wants to be when it grows up is a breaker box full of 30-60 amp breakers. :-)