The Autotransformer: for a step up, step down and split phase balancing:
An autotransformer can be used for step up, step down, and split phase output balancing purposes. While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention.
When operating in inverter mode, the neutral output of the inverter/charger must be connected to the ground to guarantee the proper functioning of a GFCI. In case of a split-phase supply the neutral must be grounded.
In case, of overheating, the Autotransformer is disconnected from the supply. The reset is manual.
An alternative to stacked inverters :
The alternative to stacking two 120V inverters to provide a 120/240V split phase supply is a 240V inverter with an additional Autotransformer.
Victron Autotransformer 120/240VAC 100A ITR000100101
|GTIN (Global Trade Item Number)||8719076022428|
|Product Category||Batteries Other|
|Dimensions||110 mm x 214 mm x 425 mm|
|Net Weight (kg)||13.5 Kg|
|Maximum Charge Current||100A|
|Input Voltage||120 / 240V|
|Manufacturers Warranty||5 Years|