Need 12V at my Classic(24V batteries)

[Hockey]

My 2 Classic 150s are charging 24V batteries.   I need 12V for some DC fans and lights nearby.  The loads are pushing 1A, so do not want to rely on the 1A configurable on AUX1.

Below are the options I am considering:

1.  Wall wart.  There is a 120V receptacle nearby.
2.  CAT6 comes into both Classics.  It's easy to energize it with 55V via a POE+ switch.  Then add a splitter with a built-in 12V buck right before the RJ45 in the Classic.  It would give ~25-30W - enough to handle my loads.
3.  Run 12v conductors from the 12V fuse block which is 15' away.
4.  Tap into Bat+ inside the Classic, fuse and step down to 12V with a LM2596 or other buck.

My thoughts:
1.  Don't like wall warts, but okay as a temporary solution.
2.  I have the switch, but would need to buy the splitter ($20-30).
3.  Don't like running wires if avoidable, but that's just aesthetics.
4.  Is this frowned upon?  Also (I think) WizbangJr would not track current drawn by option #4.

Any other options you folks suggest.  Any strong feelings for/against any about listed options?

[ClassicCrazy]

make a 24v dc output circuit from the batteries and then power your dc to dc converter.
That way you will have all the power you need for future 24v or 12v .
I used a Samlex 20 amp 24v to 12v converter for a long time but recently switched it to a Victron 48v to 12v  converter.
Larry

[Barry Fields]

https://www.amazon.com/EPBOWPT-Converter-Regulator-Voltage-Transformer/dp/B07V6X6L89/ref=sr_1_13?crid=3RR0B0KB2X34N&dib=eyJ2IjoiMSJ9.L-pFyc8W_lUVnvDFtFRpnVMLuLfptLoJpWyrmccPcU5SrF4iLBRsmKtTXORoDVSmOp0Yqc17hMCnTGWQHh3zaaMU5kKfutfCKGlvQjMeNZR96k-T9bfs6mrJ8a6smomqnp70z_oQ4Lg3uSDcarObevAso1s8GrZIt9y9VpvODm-ROdXdgjmaX5a9fhDMHNezXVh-Uccj3q8fIxTVzNDTohsWubY8D-nzdeFkkjk4c6I.c3fixkb5I3MzPKRuekHa2OEChw2oj3tvelqbhAjmvNk&dib_tag=se&keywords=dc%2Bto%2Bdc%2Bconverter&qid=1718211976&sprefix=dc%2Bto%2Bdc%2B%2Caps%2C97&sr=8-13&th=1

Just a suggestion

[Hockey]

Thanks.

I use an XY6020L to step down my 24V battery voltage into my 12V fuse block.   Running conductors from there to the Classic is option #3.  Sounds like that is your suggestion.

Regarding the XY 6020L...  It has a UART and can be controlled via Modbus that I have played around with.

[ClassicCrazy]

I just looked up XY6020L  - never saw those before.
You might as well supply it all the power it can use .
12 gauge at 24v would potentially give you 480 watts of input to it.
Larry

[Hockey]

I just looked up XY6020L  - never saw those before.
You might as well supply it all the power it can use .
12 gauge at 24v would potentially give you 480 watts of input to it.
Larry

XY 6020L Arduino library here:
XY6020L Arduino library

I will start a new XY 6020L thread about it in "Off Topic Discussions" board.  In an attempt to keep this thread on topic.