I am using 2 of these manual transfer boxes for 10 circuits each. They are fed by 2 solar arrays and 2 different inverters. It has rocker switches so there is never a way to have solar power on at the same time as grid tied power.
I was looking at a similar product but from reliance controls. I have used one in the past (protran/2), and to be honest I really liked it. I had full control over the loads. An ATS based system removes some of that flexibility IMO. I know this because I replaced it with a generac ATS, and I had to be around when the power went out or risk overloading my genset until I got the 16k unit in. In ATS driven systems you must assume you won’t be home when it happens and that also everything that can turn on will turn on. This goes for solar or genset based things.
i think if I am capturing your question correctly, you want to use the inverter as an SDS. This will work with these types of panels, and you can bond you neutral to ground. But you could not in turn connect that back into your main panel on an interlock. You either provide a full SDS or you do not. You either switch to the SDS completely or you do not.
@Desert_AIP is correct.
Bonding can only be done in one place, and the mentioned (protran/2) panel style switches the hot leg, thus disconnecting the bond provided at the service entrance. They are designed to support the usage of portable generators as a source of backup power as many of them as neutral bonded.
EDIT: The protran/2 does not switch the neutral leg, it switches the hot leg. I honestly don't know how this thing made it through UL
if you are looking to use an interlock I suggest following along in the thread
@Desert_AIP mentioned, we do have quite a good conversation going there.
This seems to be a very popular setup, but thus far, nobody seems to have cracked the DaVinci code of safely using a Growatt SPF 5000 ES with a SEAUTO-TX-5000 Auto-Transformer and using the AC input of the Growatt in a 'utility first' configuration. Signature Solar has posted a schematic that...
diysolarforum.com
We are working on exactly that. We want to build out a few scenarios and the publish wiring charts that are simple to follow.
There are charts available in the thread address things such as lost neutral (because what happens when the auto transformer fails).
With these units, you cannot get usable power for anything other than 3 wire 240 circuits without an auto transformer. (L1/L2/G). If that is all you plan to run, then you can pretty much disregard this whole post.
*edits due to the horrible keyboard on my ipad