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Charging R5500 ERM

Andre Canis
Occasional Visitor

Charging R5500 ERM


we want to add an ERM to a R5500. The manual says to let the UPS charge the ERM while in standby mode, which would mean at least 24h downtime.

Can we charge the ERM in Operate mode and keep power to the attached servers?

Or could we use a different R5500 UPS to charge the ERM and then attach it to the intended UPS? Or does the UPS need to charge the ERM itself for calibration?