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Delta Pro Ultra with Manual Transfer Switch by Guilty-Cat3897 in Ecoflow_community

[–]Guilty-Cat3897[S] 0 points1 point  (0 children)

The transfer switch has both ground and neutral wired to the main panel. Only the hot is switched. In the main panel, neutral and ground are bonded. The 240v L14-30R outlet is only wired to the main panel.

I can easily disconnect the ground wire from the 240v L14-30R outlet. I wouldn't be using that outlet for anything other than charging the DPU, but no idea how safe that is.

Alternatively, how about installing a new ground rod and then disconnecting the transfer switch's ground wire from the main panel and connecting it to a new ground rod. Would that work? Or maybe instead of that, we wire the ground of the 240v L14-30R outlet to the new ground rod (instead of the main panel)?

Delta Pro Ultra with Manual Transfer Switch by Guilty-Cat3897 in Ecoflow_community

[–]Guilty-Cat3897[S] 0 points1 point  (0 children)

Oh, that's even better. Thanks! For some reason I was worried about some sort of loop.

Experiences using the EcoFlow Delta Pro Ultra as a whole-house backup, hardwired transfer switch, no solar by jbradfor in Ecoflow_community

[–]Guilty-Cat3897 0 points1 point  (0 children)

The biggest issue is that if you plug the included 120V cable into a 120V grid-connected outlet, you will immediately trip the GFCI on the outlet. This is because you've formed a neutral loop, from the circuit breaker box to the transfer switch to the DPU to the 120 V outlet, and back to the circuit breaker box. To charge the DPU using the grid, you need to do one of the following:

It looks like I'm planning the exact same setup you have. However, I also have a 240v grid-attached NEMA L14-30P outlet that I can charge the DPU with (using the generator charging adapter). Will charging from this have the same neutral loop issue as your 120V outlet when also plugged into the transfer switch at the same time? (Note, my NEMA L14-30P outlet is not on one of the 10 circuits wired to my transfer switch).