- VoIP & Phone Systems
How to Migrate from a Traditional PBX to VoIP
18 Mar, 2026

£241.48 inc. VAT
AI-generated summary
For £201.52 ex-VAT, the TP-Link PSM500-AC only makes sense if you’ve specifically got a niche use case where you *need* that form factor and reliability from a known networking brand. On paper, 550 W and “inverter” usually screams “backup power for IT,” but in practice these units are often about covering the gaps for network gear or light loads—not being your main UPS solution for an office. If you’re looking for a straightforward, cost-effective UPS replacement for desktops, switches, and small servers, you may be better served by a mainstream UPS with the right runtime for your load and better ecosystem support (monitoring, alerts, easy battery planning).
Who should buy it: businesses that want a tidy, indoor-friendly power/inversion solution tied to networking deployments, and whose load profile is modest and predictable. Who should not: anyone expecting it to act like a full data-centre UPS, or anyone who can’t justify the price with concrete runtime needs. Also, double-check practicalities like output quality, cabling/fit in your rack or setup, and what you’ll actually power during outages—because if your real requirement is “keep work going for X minutes,” this price point has to be compared against the total cost of ownership of a proper UPS. If you tell me what devices you’re backing up and for how long, I can sanity-check whether this is good value or a stretch.