Alternative to ET112 for 120V Applications

I would like to get all “house” AC current to show as a total, due to some gen/shore items not going through the MP2. The ET112 usually accomplishes this yet its for 230Vac only. There is a 120Vac variant part number: ET112DINAV11XS1X although this unit is only directly from the supplier in Spain.

Are there any other ways to include total house loads that don’t pass through the MP2 inverter?

Thanks!