This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
I know the correct behavior (for safety reasons) is to stop powering loads on AC-in-1 after grid failure, but is there a regulatory approved device similar to a generator automatic transfer switch (ATS) coupled with an assistant that would enable this?
The answer it is not possible and this is also a really bad idea.
Why can't you just feed the ATS from the AC-OUT? This would work and is how the inverter is designed to operate.
@shaneyake Why is it a bad idea? First, if I connected all my loads to the AC-out I wouldn't need an ATS. ATS's are how generators isolate from the mains to prevent back feeding. How is an inverter any different from a generator? I have a 200A/240V split-phase service. The Quattro's can't handle the feed through current. They are limited to 100A. For my application paralleling with ESS and managing the load after a grid failure would be optimal. Otherwise, I'd have to rewire to separate loads.
I don't have the drawing abilities you have but your suggestion is suboptimal due to a geography challenge. I have three buildings (1,2,3) all served by a single 200A 240v split phase service that's on a pole with the meter and feed panel not local to any of the 3 buildings. Building 1 is 200ft from the feed panel and is served by a 100A breaker. Building 2 is 100ft from the feed panel and is served by a 200A breaker. Build 3 is 100ft from building 2 and served from a sub panel in building 2 from a 70A breaker. Building 1 will contain all the Victron equipment. (2) Quattro's (48/5000/70-100/100 120V) in a split-phase configuration, (2) 48v 304ah batteries, and a Smart Solar MPPT RS 450/100 with (16) 415W solar panels. All uninterruptible critical loads served by the AC-out reside in building 1 only. Building 2 is a shop that has several high load devices such as a 4hp air compressor, 30hp CNC machine, auto lift and other industrial machines. These devices will never be operated during a mains failure. Building 2 also has critical loads such as surveillance cameras, security system, lighting, pressure pump, electric roll up doors, etc. Building 3 only has surveillance cameras, security system, lighting, etc. Currently all 3 buildings critical loads (managed) are served happily by a single Honda EU7000is generator during a mains failure from the feed panel. I have 2 requirements. 1) Reduce electric bill with ESS by back-feeding loads from building 2 & 3 and generating power for AC-out loads in building 1. 2) During mains failure power critical loads in all 3 buildings. Your ATS configuration would work, but I'd have to mount the transfer switch at the main feed panel and trench an additional 200ft line from building 1 to it.
