Would a dual Xantrex SW system need a T240 autotransformer for 240v output?

I'm in the process of setting up my "new" system and wondered if the dual Xantrex SW5548's can produce 240v without the autotransformer. It seems I read somewhere lately that the T240 isn't necessary for a dual inverter system like this. Forgot where I saw it so I can't go back and re-read it. I fully intended to put the T240 in the system, even though I don't plan on needing 240, but it also allows me to use a 240v generator to charge the batteries at a faster rate, which translates to less engine run time. But now I'm curious because if this system DOES produce 240, maybe it will also be able to handle a 240v generator input without the transformer, too. I know this is considered an old school topic, but since I'm using 2 new old stock inverters, I'm reaching out to the folks who have or have had these and know the answer to this question. Thanks for any and all info.

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“SERIES” STACKED OPERATION As mentioned, in North America two inverters can be connected in a “series” stacked configuration to provide 120 and 240 VAC output. When series stacked, you get twice the power of a single inverter available for operating 240 VAC loads, but only one inverter’s power is available for operating a single large 120 VAC load. Separate 120 VAC loads can be operated from either inverter. Do not connect the AC output terminals of the inverters in parallel - this will not work. A special stacking interface cable (SWI) is required to connect the series stacking ports of the inverter to ensure the output voltage waveforms of the two inverters are phase synchronized and locked 180 degrees from each other. This allows connection to 120/240 VAC generators and utility grids. The 120 VAC loads are split and connected to either inverter. Both of the inverters operate completely independently - except their frequency is locked. They do not operate as a master-slave device as previous inverters have. One inverter can be in battery charger mode while the other is inverting to power an AC load. This independent operation allows many new possible applications and abilities that were previously not possible.

Right, I read that. So is that a no?

Yes they can produce 240 without the auto Transformer but you need a series stacking cable for an SW inverter