[snellemin]

The Server power supplies are top of the line products. Not some dinky crap that goes into consumer pc's.

If the server power supplies fail into a fire, boy that is just a lawsuit on the PSU company. These power supplies go into expensive servers that store valuable information. There are multiple safety features installed to prevent the psu to go into catastrophic failure. And if it does fail, there are backups.

If there are any electrical shorts, the server PSU just turns off or does not supply output. A good charger will do the same. So the only thing left is your batteries that can go up in flames, which can be taken care of with a lipo bag. MA knows this too, which is why they sell their 24V server setup. It's dummy proof.