Ubiquiti SmartPower RPS
The Ubiquiti SmartPower RPS is not a UPS, and that single fact made it a purchasing disaster for me. The product description is frustratingly vague about what it actually does, which led to an expensive misunderstanding. The RPS is a redundant power supply—it keeps your UniFi equipment running if the internal power supply module fails, not if the electricity goes out. If you lose power, everything still goes dark. For most home lab users, this solves a failure mode that’s relatively rare and usually fixable by swapping hardware. What you almost certainly want instead is Ubiquiti’s actual UPS line, the UniFi SmartPower USP , or the Mission Critical Switch which integrates battery backup directly into a PoE switch.