- Cloud Backup
Understanding RTO and RPO: Two Numbers Every Business Should Know
11 Mar, 2026







£1549.54 inc. VAT
AI-generated summary
If you’re buying a rack UPS for a small server stack that actually sees real outages, the APC Smart-UPS X SMX1500RMI2U is a sensible, boring choice. The big advantage here is reliability and runtime that you can *grow* as your setup expands—so you’re not forced to re-buy immediately when you add disks, switches, or another server. For UK B2B environments where downtime is expensive but you don’t want to babysit power protection, it’s the kind of UPS you’ll spend less time thinking about and more time forgetting about.
That said, £1291.28 ex-VAT is only “good value” if you’ll use the runtime properly and you’ve got the right load profile. If you’re powering something light or mainly for “safe shutdown” on a couple of network devices, you might be paying for headroom you won’t need—cheaper APC models can often cover that use case. Also, make sure you’re comfortable with the ecosystem: the unit’s expandable runtime is great, but it’s not free, and planning matters (plus you need suitable rack space and airflow). In short: buy it if you want a dependable rack UPS with room to scale; think twice if your load is modest and the budget is tight.

APC
APC Replacement Battery Cartridge #164 - UPS battery - 1 x battery - Lead Acid - 128 Wh - black - for Back-UPS Pro BR900MI

APC
APC Back-UPS 950VA - UPS - AC 230 V - 520 Watt - 950 VA - USB - output connectors: 4 - black

ATEN
ATEN Professional OL1000HV - UPS (rack-mountable / external) - AC 220/230/240 V - 1000 Watt - 1000 VA - 9 Ah - RS-232, USB - output connectors: 8 - 2U

APC
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