A little project nearing completion: redundant 26V battery backup power supply for a couple of 48-port Ubiquiti switches (plus a redundant 54V battery backup power supply for couple of POE-powered Ubiquiti access points).
Should provide upwards of 24 hours of battery backup.
@JWilliams
Nice! I hope you have safe trays for the batteries in the final installation location. Lead-acid batteries can get very hot and crack, leaking acid during use and lithium batteries can catch fire during use. Ventilating fumes away from people is also something to plan for. Better safe than sorry. :)
@Spartan All good advice. The batteries in question are AGM and gel cell types (two separate power supplies), and I have a tray ready.
The chargers/power supply boards are Altronix current limited systems designed for fire and burglar alarm duty with gel/agm backups, so overcharging is not much of a danger.
@JWilliams
Excellent! I've been around a couple of UPS fires and they're no joke. Glad you're ahead of the curve!