Gratuit · Réseau et infrastructure IT
Dimensionnement d’onduleur (UPS).
Dimensionnez un onduleur selon vos équipements : puissance en VA et en watts avec marge, énergie de batterie pour l’autonomie voulue, courant et chaleur.
Modern power supplies with PFC are 0.9–0.99.
Check the UPS datasheet: many models are 0.9 or 1.0.
Lead-acid capacity falls at high discharge rates; lithium keeps more.
- Load now
- 1,355 W · 1,506 VA
- Minimum rating with headroom
- 2,258 VA / 2,032 W
- Load on the chosen UPS
- 50.2 %
- Battery energy for the runtime
- 470 Wh
- Battery capacity at 48 V
- 9.8 Ah
- Input current at full rating
- 13 A
- Heat from equipment
- 4,623 BTU/h
- UPS losses while online
- ≈ 151 W
- Runtime from battery energy is approximate: lead-acid batteries deliver less at high loads (Peukert effect) and age. Check the manufacturer’s runtime chart for your load.
- Measure real draw with a power meter or the PDU; nameplate ratings are maximums and often overstate typical use.
- Laser printers and heaters have large surges and should not be on a UPS.
Comment utiliser cet outil: Dimensionnement d’onduleur (UPS)
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Notes techniques en anglais
Runtime from battery energy is approximate; check the manufacturer’s runtime chart. Standard sizes are common ratings, not specific products. Everything is calculated in your browser; nothing is sent or probed on the network.
Required rating = load × (1 + growth) ÷ maximum load, in both watts and VA; the smallest standard size meeting both is chosen. Battery energy = watts × runtime ÷ (inverter efficiency × usable capacity).
1,355 W of servers, storage, switch and firewall need a 3,000 VA / 2,700 W UPS and about 470 Wh of battery for 15 minutes.