Hi all,
I'm building out a 3 phase UPS for some critical loads in a machine shop (primarily the air compressor, and the CNC machine). The actual power draw isn't crazy, but it's 3 phase only in a space that currently only has US 120/240 split phase. Previously the shop used a Phase Perfect inverter in their old location, but we have an idea I want to run by the community as I hadn't heard from Eg4 support.
Since the 6000XP supports 3 phase chaining in August firmware update, we are looking at chaining 3 of these each with a battery stack. Now there are two options for Grid input:
- send the same split phase Grid input to each inverter - this is the simplest and may give most efficient results, assuming that the inverters don't mind having the same Line source. I can't find a reason they shouldn't but I've never configured inverter stacking for 3 phase before.
- Use chargeverters to the batteries rather than grid power to the main units, which would give us an "online-only" mod UPS which has some advantages such as zero changeover time in outage unlike grid feed into the inverter. However, this adds complexity and I'm not sure how the controller in the 6000XP units would like the charging voltage from the chargeverters over the expected max battery voltage
For those who may suggest just putting a normal 3 phase converter after the UPS system, note that weirdly this whole setup would be cheaper than building an equivalent split phase UPS and adding a converter afterwards since solid state inversion costs a pretty penny
Cheers,
~H
