mat60 wrote:
When I'm at lets say 120 volts with no load and I turn on my air cond exc what is the lowest reading I should see without doing damage to things?
My Progressive Industries EMS-HW30C disconnects power to the coach when incoming source voltage, under load, falls below 104 vac so I like to see at least 110 vac incoming without much load, before turning on the A/C. Some would be uncomfortable with 104 vac but TRC has selected an even lower 102 vac as their EMS low voltage disconnect threshold. You didn't ask but if you're truly concerned about potential damage to your rig's electrical system you'd be doing yourself a huge favour by investing in an EMS.