(from WebobUPS Blog 3/2015)
Can you use a APC Symmetra RM system to power a Subpanel?
Not if you buying direct from APC…. This is because the Symmetra RM is a transformer-free unit and doesn’t have a true fixed neutral. You need a good neutral to properly energize a panel. The RM will never get a true L to N 120v even with a stepdown transformer.
But at GreenLight Labs we put together a RM Subpanel friendly unit for you. We even have a cute roll around cart for it.
The SYRM6S is the subpanel ready Symmetra RM unit with full 6kva output in a split phase design. Use it to power the subpanel or super condition your equipment or instruments. We even include a physical bypass switch.
Look for it at the store soon, but for now ask for it by name..