Calculate end-to-end power chain efficiency from UPS, PDU, and transformer efficiencies.
Uninterruptible Power Supply efficiency at current load. Modern double-conversion UPS units typically achieve 94-97% efficiency. Eco-mode can reach 99%.
%
Power Distribution Unit efficiency. Standard PDUs are 97-99% efficient. Transformer-based PDUs for voltage conversion are typically 97-98%.
%
Main distribution transformer efficiency. Dry-type transformers typically achieve 97-99%. Set to 100% if no transformer is in the power path.
%
Automatic Transfer Switch and switchgear losses. These are typically very small (99.5-99.9%) but add up in the chain. Includes contactors and bus losses.
%
Total IT equipment power draw in kW. Used to calculate absolute power losses through the chain and total facility input power required.
kW
Results
Overall Chain Efficiency-%
Total Power Input Required-kW
Total Power Loss-kW
Annual Energy Wasted-MWh/yr
Effective PUE (power chain only)-
References: IEEE 519 Power Quality Standards. Uptime Institute PUE measurement methodology. ENERGY STAR for Data Centers efficiency benchmarks.