Two transformers are connected in parallel out of phase then I assume the net voltage obtainable is the sum of the output voltages?

 

Two separate transformers primaries are connected out of phase, they still require correct phasing of the secondaries if summed, either through prior indication of the relevant winding start or by detection.
If series connected, no harm can come of incorrect phasing, if identical windings in parallel, then incorrect phasing must be carried out or short circuit current is a result.
Max.

 

Two separate transformers primaries are connected out of phase, they still require correct phasing of the secondaries if summed, either through prior indication of the relevant winding start or by detection.
If series connected, no harm can come of incorrect phasing, if identical windings in parallel, then incorrect phasing must be carried out or short circuit current is a result.
Max.[/QUOT
Or the net voltage obtainable is the same as if onre transformer was used or being used due to being hook up in parallel. Would you agree on that . I dont think it would be zero

 

The most accurate/practical way of paralleling transformer windings is normally to wind them bifilar on the same core.
Max.

 

It's an old adage......

"One picture is worth a thousand words."

And not a schematic in sight yet.