let's explore that ems bypass just a bit. the bypass is a little toggle switch on the display. my understanding is that it will bypass high or low voltage conditions that the ems system detects and wants to stop from going into the rv. by using the bypass switch you can override the ems and let the power in. somebody also stated that you still have surge protection in this situation. but I know that the override switch will not bypass if there is a problem such as open ground. i do not know if it would disconnect if you had it bypassed and some other problem then occurred (amperage, frequency, etc). finally i took the question to ask if the bypass would work if there were a component failure with the ems itself. i know progressive says they will ship replacement parts for the ems, but if an ems internal board failed would the bypass still work? or would you be without power until the internal component was replaced. if you take the cover off there is a manual button to push inside the ems unit to manually connect the contractors to pass power, but i do not remember a method to lock the contactors into a closed position.
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