should i use 12v,24v,48v?
which should i use?
Thanks
How long is a piece of string?
That is the context of your question.
Insufficient information to even try to offer an answer
You need to do some research and formulate a sensible question based on your plans / needs.
There is no way anyone can answer this other than "It Depends".
Think it over and repost with some detail and we can certainly help you sort it out.
Tom