[Dylan16807]

There's not much to standardize, basically just pick a plug shape for your desired voltage and current, it's really about building enough desire for manufacturers to take interest.

It's worth noting that there's already ATX power supplies that are built to run directly off battery power. They don't look all that impressive but they exist. https://www.powerstream.com/DC_PC.htm https://synoceantech.com/index.php?page=lotinfo&lot=36

[bombela]

How much does it cost and where to buy? If I have to call, I cannot afford it.

[Dylan16807]

Okay so click on the first link I gave you.

And then scroll down to the model you want.

The second to last column is price. Click on that (Or click on the first column where it has the model number. Either one works.).

Then click "add to cart".

[bombela]

Ah, only a single column for me. No ad blocker. The html source doesn't even include the word price! I must be getting a different page than you somehow.

I can click on the picture to get the details and volume pricing. The 300W model has no price and a minimum order of 30 units. So I thought it ended there.

But it recommends to check out https://www.powerstream.com/DC-PC-24V-400.htm where I ultimately found the add to cart for $300.