UPS Sizing · Runtime Calculator · Configuration Tool

UPS Sizing Tool and Selector

Selecting the right UPS requires balancing electrical load, runtime, voltage, and installation constraints simultaneously. The Xtreme Power UPS Selector is an engineering-based tool that calculates required UPS capacity and runtime from real project inputs — and returns compatible UPS systems that can physically deliver the requested runtime at the specified load.

Launch the Xtreme Power UPS Selector

Enter load in watts and required runtime in minutes. The Selector returns configuration-ready UPS systems with options and pricing for specification or quotation.

Open UPS Selector →

How it works

Four steps from load to configuration

The Xtreme Power UPS Selector follows the same methodology used by UPS application engineers when sizing and configuring power protection systems.

Enter connected load

Total real power in watts of all equipment to be protected. Not VA — actual watts drawn at the outlet.

Enter required runtime

How long in minutes the UPS must support the load during an outage — to allow controlled shutdown or bridge a generator transfer.

Review validated matches

Systems that meet both power and runtime requirements — confirmed against validated battery discharge data, not nominal catalog estimates.

Refine configuration

Filter by voltage, topology, battery chemistry, mounting, and communications to arrive at a deployable configuration with pricing.

Why accurate sizing matters

The most common UPS sizing error

UPS sizing must satisfy two independent requirements simultaneously — electrical capacity and stored battery energy. Most sizing errors come from treating these as the same problem.

Selecting sufficient kVA without sufficient runtime capability is a common design error

A 2kVA UPS with the right power rating but insufficient battery for the required runtime will still fail to meet the application requirement. The Xtreme Power Selector evaluates load and runtime simultaneously — ensuring every recommended system can deliver the requested minutes at the specified wattage, not just the right nameplate capacity.

UPS runtime does not scale linearly with load. Battery discharge behavior and inverter losses vary with operating level — a UPS running at 30% load delivers significantly more than three times the runtime of the same UPS at 90% load. The Selector uses validated battery discharge data combined with DC-to-AC conversion efficiency modeling to produce realistic runtime estimates rather than linear extrapolations from datasheet minimums.

Configuration filters

Refine results to match installation requirements

After initial load and runtime sizing, results can be filtered to match the specific constraints of the installation — moving from capacity sizing to a deployable UPS configuration.

Advantages over manual selection

Why use the Selector instead of datasheets

Simultaneous load and runtime evaluation

Manual sizing using datasheets requires cross-referencing capacity tables and runtime charts separately. The Selector evaluates both constraints simultaneously and only returns systems that satisfy both — eliminating the most common source of UPS specification errors.

Validated battery discharge data

Runtime estimates are based on validated battery discharge data and DC-to-AC conversion efficiency modeling — not linear extrapolations from datasheet minimums. The results reflect realistic runtime performance at the specified load, not optimistic catalog estimates.

Configuration-ready output

Results include options and pricing that can be used directly for specification or quotation. No additional steps required to move from a sized UPS to a specifiable configuration — the Selector outputs a deployable solution, not just a capacity number.

Faster than manual methods

Manual UPS sizing using datasheets and runtime tables is time-consuming across multiple platforms and capacity points. The Selector converts load and runtime inputs directly into feasible solutions — accelerating UPS specification and quoting across all project types.

Applications

Use the Selector across all UPS applications

IT and network infrastructure

Edge and distributed sites

AV and media systems

Telecom and industrial controls

Healthcare and medical equipment

Retail and point-of-sale

Education and government

Laboratory and analytical instruments

Facility and infrastructure systems

Size and configure your UPS system

Enter load in watts and runtime in minutes — the Selector returns technically validated UPS configurations matched to your application.