Of course that makes sense, protecting the motor.
My 900W was acting up a month ago when I last used it and it wouldn't run my battery charger. I checked the voltage at the genset receptacle and it read just 24VAC. The motor ran fine so I figured it was the voltage regulator or other electrical problem.
On this model you need to remove the side panel (4 screws) to check the oil, which is dumb. Anyway, I checked it and it was a down a little but still OK.
Today I changed the oil and it's working fine. So I may have an intermittent electrical problem. I'm in S&B for a while and will run it occasionally to see if it will stay acting right.