A complete 10 kVA online UPS buyer's guide for Indian businesses: use cases, single vs three-phase, backup sizing, and what drives price.
Buying Guides
10 kVA is where UPS selection stops being a commodity purchase and starts being an engineering decision. It is the typical size for a mid-sized server room, a hospital department, a manufacturing control room, or a floor of office IT. This guide walks through what a 10 kVA online UPS powers, the single-phase versus three-phase choice at this rating, backup sizing, and what actually drives the price.
What 10 kVA Powers
At 0.8 output power factor, a 10 kVA online UPS delivers around 8 kW of real power — enough for a populated server rack with networking and storage, or a department's worth of workstations and critical peripherals. As always, size against measured watts with headroom; the method is in how to calculate UPS capacity.
Single-Phase or Three-Phase at 10 kVA?
10 kVA sits right at the boundary. Paradyne offers it both ways:
Single-phase (1P/1P) — input window 160-260V, output 230V ±1%, suitable where the site supply and load are single-phase. DC bus options of 180V or 192V.
Three-phase input — preferred where the building already has a balanced three-phase supply, easing load distribution and reducing per-phase current.
Both are true double-conversion online UPS with zero transfer time, harmonic distortion under 3%, a crest factor above 4:1, and 110% overload for 10 minutes. If your load is lighter, a 5 kVA unit may suffice; for larger loads, step to 20 kVA.
Backup Sizing
At 10 kVA the battery bank is a serious component — physically large, with real weight, ventilation, and floor-loading implications. Decide whether you need a few minutes for safe shutdown, or longer runtime to bridge to a generator. The rigorous approach is covered in IEEE 1184 battery sizing; remember that most units run below nameplate, so size for the real load.
What Affects Your Configuration
Battery capacity and backup time — the dominant factor in size and weight.
Single vs three-phase and DC bus configuration.
Isolation transformer — standard on Paradyne online units, adding clean, isolated output.
Efficiency at partial load — a high-efficiency double-conversion design saves on electricity over years of 24/7 running; ask for the efficiency curve, not just a headline figure.
Service reach and warranty — decisive for uptime-critical sites.
Tell us your load, phase configuration, and backup target, and we will specify the right 10 kVA online UPS and battery bank for your site.
