It's 125 amps on each leg.... I am pulling 89 amps on A and 62 amps on B, but its not flipping my main. ... but the main 125 breaker out at the street is not flipping.
Your system will accommodate a combination of 240 volt loads (draws amperes from both legs) and 120 volt loads balanced so that no more than 125 amps is drawn on each leg.