What a 10kVA UPS is for
A 10kVA UPS (10 kW at unity pf) is the sweet spot for small to medium power protection — a small data centre, a server room, a comms cabinet, retail back-office or a departmental IT closet. It is large enough for genuine online double-conversion protection of multiple servers and networking, yet still manageable for an office environment.
Single vs three-phase
10kVA sits at the boundary. Single-phase 10kVA UPS (like Sentinel Dual SDU and Sentinel Tower STW) are common and simpler to install; three-phase 10kVA (like Sentryum S3T) suit sites with a three-phase supply or that plan to grow beyond 10kVA. If you expect to scale, start with a three-phase platform.
Runtime and charging
Internal batteries give roughly 2–15 minutes at full load; external cabinets extend this to 30–60 minutes or more. Typical recharge time is 4–6 hours. For longer autonomy without a generator, add battery strings or choose lithium-ion for more runtime in less space.
Redundancy and models
At 10kVA you can begin to build redundancy: Sentinel Tower and Sentryum both parallel for N+1. Strong 10kVA options include the Riello Sentryum S3T, Sentinel Tower STW and Sentinel Dual SDU. Use the UPS Finder for a tailored recommendation.
Frequently asked questions
What can a 10kVA UPS power?
A small data centre or server room — multiple servers, switches, storage and networking — up to roughly 10 kW of critical load.
How long will a 10kVA UPS run at full load?
From 2–15 minutes on internal batteries depending on the model, extendable to an hour or more with external battery cabinets.
Should I choose single or three-phase at 10kVA?
Single-phase if your supply and load are single-phase and growth is limited. Three-phase if you have a three-phase supply or plan to scale beyond 10kVA.
How often do 10kVA UPS batteries need replacing?
Typically every 5 years for VRLA, depending on temperature and cycling. Lithium-ion lasts 8–10 years.