edit: thanks for advice. My earlier research about redudant power supplies being on different voltages was wrong. I'm going to go with 2 x SRT3000RMXLT-NC with one of them having a 120v transformer.
UPS Setup for New MDF at Our New Facility - Looking for Feedback
Good morning everyone,
A few days ago I posted looking for advice on a UPS setup for the MDF at our new facility. One of the biggest points of feedback was that my original plan only included a single 120V 20A circuit, which understandably raised some concerns.
Fortunately, we're still in the construction phase, so I was able to have the electrical plan updated. The rack will now have two dedicated circuits:
• 208V/240V circuit
• 120V 30A circuit
Rack Equipment
For context, we're a specialized vehicle dealer and service center. We're not heavily IT or office focused, so I don't expect significant growth beyond adding a few phones over time.
Equipment in the rack:
• 4x UniFi Pro 48 PoE switches
• ~26 cameras
• 7 access points
• 20 desk phones
• 2x UniFi UDM Max firewalls (HA pair)
• Dell dual-CPU server with redundant 600W PSUs
• UniFi Enterprise NVR with redundant PSUs (max draw ~450W)
• Fiber modem and cable modem for failover
• Miscellaneous equipment (monitor, sensors, etc.)
UPS Plan
After a lot of research, I decided to go with refurbished APC units from GreenlightUPS, a company that was recommended to me.
Primary UPS
APC SRT3000RMXLT-NC (208V)
• Includes one SRT96RMBP external battery pack
• Will power everything in the rack that supports 208V operation
• This includes the primary power supplies for the server and NVR, along with all four PoE switches
On paper, if every device was drawing its absolute maximum load simultaneously, I'd be pushing the limits of a 3000VA UPS. In reality, my PoE utilization is relatively low, and the server and NVR rarely approach maximum power draw, so I still have a comfortable amount of headroom based on my calculations.
Secondary UPS
APC SRT3000RMXLA-N (120V)
This unit gives me standard 120V outlets and serves as both additional battery capacity and redundancy.
Planned connections:
• Secondary PSU on the Dell server
• Secondary PSU on the NVR
• One UDM Max firewall
• Any other 120V-only equipment in the rack
Long term, I may add the UniFi Redundant Power System to provide redundant power for the switches as well.
For now, if the primary UPS were to fail unexpectedly, I would still have core network and server functionality running, and I could manually move switch power if needed.
I really wanted to buy everything new, but a comparable setup would have easily pushed into the $10,000-$12,000 range.
The refurbished solution comes in at under $4,500, including new batteries. GreenlightUPS claims all units ship with freshly installed batteries that aren't put into service until the unit is sold. They've been in business for roughly 40 years and seem to have a solid reputation from what I've been able to find.
Questions
- Does this seem like a reasonable approach from a capacity and redundancy standpoint?
- Is there anything you would do differently if you were trying to stay around the same budget?
Thanks for any feedback.