That makes sense SND, especially as with a single engine shutdown/failure/gen failure all the demand from the role equipment would be automatically lost. Therefore the loading from the battery wouldn't be so great once the Shed Bus is switched and it would only be open for a short time.
However, how would the system stand with the Shed Bus open for hours at a time?
As I say, I'm no wiring guru so my interpretation of the battery load may well be incorrect.
Makes you wonder; if one company is doing this, why hasn't word got round?