How does electricity work?

[Mschmidt]

Haha, yeah good question, really. Title just gave me a chuckle!

I try to keep them somewhat interesting.

 

[ShakeyGizzard]

I use one of these for other things outside of an aquarium. Also was going to use one smaller and 12 volts to power my ATO. Link is to a amazon power supply, there are many, as far as voltages and amp capabilities .
Power Supply

 

[BigMonkeyBrain]

Allow me to give more explanation. I want to use fewer plugs on me surge protectors. I have three Kessil 360 lights (and a number of other DC powered devices, as we all do). I want one power supply to rule all three lights.

peak light demands are 19v and 90w.

To link them all I want an inverter that offers 19v and at least 270w? Is that how it works? what if the rating is in amps, what's the number then? Do I need to leave a power buffer (eg. 310w)?

Yes, that is how it works. Watts = Amps x Voltage

Most laptop power supplies are 19-volts, cheap replacement for some power supplies.

Probably happens !

“So let it be written, so let it be done”