upsAdvControlSimulatePowerFail 1.3.6.1.4.1.318.1.1.1.6.2.4

Setting this variable to simulatePowerFailure(2) causes the UPS switch to battery power. Setting this value to noSimulatePowerFailure(1) has no effect. The value noSimulatePowerFailure(1) will always be returned when the variable is read.