I’m trying to understand the UPS features of my new Apex 300. North American 120/240VAC split phase.
For the four NEMA 5-20R on the front, the manual states “When the output voltage switches to the 240V, the 20A sockets [on the left] has a difference of 0ms and [on the right two sockets] 20ms. When the output voltage switches to 120V, both are 20ms”
My question: what about the other two output sockets - the Apex has a NEMA 14-50R (120/240V) and a NEMA TT-30R (120V @ 30A). Do these operate in 0ms or 20ms UPS mode?
My goal is to have an “always online” UPS where the inverter is always running and use the NEMA 14-50R socket to power a transfer switch.
I think when connected to grid power in 120 you are in pass through mode and when the grid is lost you switch over to the battery, that’s why its 20ms. When in 240 mode the 2 outlets on the left are fed exclusively from the battery through the inverter, that’s why its 0ms, because its already on battery. That tells me that if you are in 240 mode and the inverter is on, the 2 outlets on the side are on as well. I would love to hear from others because I’m a little fuzzy on this myself.
I was going to buy a large APEX 300 setup for exactly this feature…battery priority …UPS mode…essential loads always on Bluetti battery …off peak charging,peak discharging…solar day charging to supplement the off peak charging. a simple question and all I wanted was the parts list so I could buy everything in on shot. The answer from bluetti…we dont support that feature.
so I have some AIMS equipment installed…3 wires from the main pannel…3 wires to essential loads sub panel…AIMS inverter in battery priority mode…charges off peak…supplimented by solar…just follow the schematics and logical diagrams provided in the AIMS manual.
good luck getting a straight answer from bluetti.
I did some testing and discovered that in 120V mode, you do get power on the NEMA 14-50R receptacle - instead of L1 and L2 out of phase, you get L1 on both hot lines. This is useful for me since I am plugging into a transfer switch which has L1 and L2 (but is wired for 120VAC only).