I don't see how...you would have to ground the bank at two different points and that tends to let the factory installed smoke out.
The existing 120/240 transformer remains connected to neutral at the center. The two new transformers are 120, and each connects to the neutral at one end. You end up with a perfect "peace sign," with the 120/240 as the vertical section, and the two new 120s as the angled legs.
[This message has been edited by SolarPowered (edited 07-12-2006).]
