Hi BFL13,
Yes, (assuming zero losses) the Sola Basic looks like this:
IN
100 volts @ 12 amps = 1200 watts
OUT
120 volts @ 10 amps = 1200 watts.
That is simplified of course, because the autoformer does "cost" 4% to operate. So the "in" side would be about 1248 watts, not 1200. Since you prefer amps that would be 12.48 amps rather than 12.
BFL13 wrote:
"which could be more useful than expect it to boost power."
I would assume that it cannot boost Power since you can't get more out than in, but it could perhaps boost voltage while reducing amps for the same power?