Moes Automatic Transfer Switch Question

Hello,

Good day. I need your opinions/suggestions/critiques about my plan to install a Moes automatic transfer switch. I am planning to use one for my house. I have drawn up a crude diagram or schematic on how I plan to wire it up. Please see the picture below.


Please forgive my crude diagram. Just did it on MS Paint. Me writing it down is much worse. So on my drawing, I got the 220v utility grid / public power splitted in two, one goes to the Grid IN of the ATS, the other goes to a switch ( 1st question, is there a special kind of switch I need to use for this? ) that connects to the house wiring grid. The ATS Load Out is also connected to the house wiring grid. And finally, the inverter is connected to the Inverter IN of the ATS. Inverter is of course connected to the batteries being charged by an SCC.

I am thinking that if the ATS fails somehow, or needs to be replaced, I can flip the switch ON so my house still gets AC power from the utility grid.
My aim is to have my house run on solar, with enough batteries, and installing an ATS that will give me the safety net in case battery gets too low. I still want the freedom though to run the whole house straight from the utility grid at the flip of a switch when needed, or if any of my solar related devices fails or needs troubleshooting.

Will this actually work? Do I need any other switches or fuse/breakers anywhere else in this diagram?

Thank you.

I'm not an expert, but I would assume it is unsafe to run the main power BACK into your ATS. I would put an additional switch between the ATS and the house wiring, BEFORE the main power input switch, preventing the electricity from flowing back into the ATS.

That's definitely unsafe! The AC power could/would be out of phase.

You need a double-pole double-throw switch. See if this post helps you out: https://diysolarforum.com/threads/help-help-inverter-output-wiring-connection.13994/post-156988.

svetz said:

That's definitely unsafe! The AC power could/would be out of phase.

You need a double-pole double-throw switch. See if this post helps you out: https://diysolarforum.com/threads/help-help-inverter-output-wiring-connection.13994/post-156988.

Click to expand...

Thank you svetz and A.Justice for the response. I definitely see what you mean. My main does loop back to the Load OUT when that switch is flipped on that diagram. Thank you both. I'll get that appropriate switch, or do two switches. We'll see.

Please do a single switch, the problem with two switches is sequence errors. No possibility of a mistake with a single switch handling everything.

svetz said:

Please do a single switch, the problem with two switches is sequence errors. No possibility of a mistake with a single switch handling everything.

Click to expand...

I hear you. Thank you. I have my revised diagram. Is this any better?



This now allows my to manually choose between getting power from the Load OUT of the ATS, or from public power right?

Thanks again for your inputs.

GerardJacinto said:

... Is this any better?...

Click to expand...

GerardJacinto said:

I hear you. Thank you. I have my revised diagram. Is this any better?

View attachment 26955

This now allows my to manually choose between getting power from the Load OUT of the ATS, or from public power right?

Thanks again for your inputs.

Click to expand...

where did you put the grounds