I see on the data sheet for the multiplus 24v 3000w inverter/charger that in the "inverter" section it list output as 120VAC +/- 2% and under the "charger" section, the input is 94-140VAC. Does that output apply to inverted loads only, or does it act as an autotransformer and convert (for example) 100VAC shore/gen power up to 120VAC as well? I'm trying to figure out if I should install a separate autotransformer in the RV to account for some RV parks voltage dropping below 110v during periods of high demand. Thanks in advance.