What powers my 12v interior lights?

[Roguesovereignmind]

Hey I’m a little confused and just trying to wrap my head around the 12 V system. It looks as though the previous owner who had converted it was running five or six overhead 12 V lights from the coach batteries. he then connected all of those to one of the switches next to the driver so you could turn them all on and off at once. That’s cool and I’m going to reinstall those. But I bought a bunch of small recessed LED lights that I’m going to put on switches and dimmers for three sections of the bus, A couple max air fans, some LED strips for above the windows in the living area and then I’d like to have some general USB ports for charging.

I purchased a marine DC fuse panel so I could run a few different DC circuits. I guess my question is what does this runoff of? I have a few marine deep cell batteries I’m going to set up running 24 V and I plan to get a 24V MPPT or similar all in one inverter charge controller mppt unit, 700 watts of panels. I’ll have a DV-DC step down converter. I’m assuming the DC stuff just gets hooked up to the batteries and then the inverter unit will charge them as needed from the solar or switch to shore or generator depending on what I’m using. That’s the way I understand it now but I could be mistaken. If I am, could someone please explain it to me? I would really appreciate it.

For 110 currently the bus has a 30 amp plug and the breaker box from the previous owner and I will be adding a couple extra circuits to it for washer dryer and refrigerator. Both will be 110v.

[HamSkoolie]

I would start reading and using YouTube university.
You simply don't CURRENTLY have the needed knowledge to put together an effective AND SAFE system.
Not to worry though, lot's have figured it out before you after starting right where you are.
I would recommend going to a HAM club website that has training presentations....HAM's learn basic electroncis and that's some of the basics you need..... like AMPS, CURRENT, VOLTAGE, and how they interact via ohms law. Basics about switches and relays, transformers, and all that fun stuff.
I'd try out CareHamRadio.com and go to their presentation on "basic electronics". Unless you want a HAM license the rest doesn't much cross over.
Pay particular attention to ohms law and the power equations. These will help you determine how much power you need and help with getting it safely to the use point.

[Roguesovereignmind]

Thanks I have been doing that. I haven’t been able to come up with a satisfactory answer to my Specific question about the 12v

[Hutchy]

Originally Posted by Roguesovereignmind

Thanks I have been doing that. I haven’t been able to come up with a satisfactory answer to my Specific question about the 12v

yes the 12v panel will hook to the 24v to 12v step down converter that is hooked to the 24v battery bank

[Roguesovereignmind]

Originally Posted by Hutchy

yes the 12v panel will hook to the 24v to 12v step down converter that is hooked to the 24v battery bank

Yeah I figured I might have been overthinking it a bit as I tend to do thanks.

[HamSkoolie]

Originally Posted by Hutchy

yes the 12v panel will hook to the 24v to 12v step down converter that is hooked to the 24v battery bank

AND


If your 12 volt panel isn't going to be where the batteries are, run 24 volt battery power to the location of the panel and install the buck converter there. Higher voltage means more power can flow on a given wire size. Step down to the 12 volts at teh point where you will distribute 12 volts and you'll be able to use smaller wires (than if 12 volts) on the feed to the buck converter as well as from the distribution point because the length from fuse block to point of use is shorter than if down in teh bowels of the rig.
We're actually thinking about running three 12VDC block so that block to point of use wiring can be reduced.
It also reduces voltage drop and other losses that can be significant in a long run.