Low Voltage - Heat Wave
You might want to check your voltage if you are here in the east. My area dipped to 103 volts, that I observed, and it may have been lower. In a campground, with heavy loads, it is probably lower. ...
Forum Discussion
pianotuna wrote:
My comfort zone is 107 and up, so the current ems units are useless to me.
SoundGuy wrote:
Your choice, but clearly Progressive Industries' engineers who have selected 104 vac as their low voltage threshold would disagree. Choices, choices - whom to believe? :W
myredracer wrote:
You might start with reading the RV AC manufacturer's min. requirements. I've seen one of them specify. min. 105.
I'd have to check my documentation but as I recall my Dometic A/C specifies 103.5 vac so Progressive's 104 vac low voltage threshold meets that requirement. Regardless, by purchasing my Progressive EMS I've obviously chosen to put my trust in their engineering rather than someone's internet opinion. ;)
myredracer wrote:
As well, a static min. voltage reading isn't always the whole picture because when an AC starts up and draws 5-6 times running current, voltage can drop out of sight and lead to damage to the motor windings over time.
Absolutely, but with an LRA of +/- 60 amps on compressor start up specifying a low voltage threshold of 107 vac instead of 104 vac isn't going to make any difference at all. When I tested both the Coleman Mach III+ and later the Dometic I currently have with an EU2000i source voltage from the genset momentarily dropped to half :E but the genset recovered almost instantly and did not shut down due to overload. Obviously I had to remove the EMS in order to do this but it did work reliably until ambient temps rose into the 90s. That was before I knew anything about the Micro-Air Easy Start so if I were to do this again I'd invest in an even more capable EU2200i and install an Easy Start on the A/C.
