Hughes autoformers

cavie,

Are you saying your ems only does high and low voltage cut outs for you? Or does it do a polarity and open neutral check?

whjco wrote:

bob213 wrote:
I use both an autoformer followed by an EMS. With more and more larger units(two or three ac units) in campgrounds, voltage goes low a lot more often than people realize. I feel like I'm protected from both low and high voltage.
I couldn't make a choice of one or the other.

I first bought a surge suppressor but found that I needed the voltage boost so I bought an Autoformer. The Autoformer I purchased has surge suppression built into the unit. I'm just curious why you're using both the Autoformer and the EMS?

Autoformer has surge protection but not EMS protection.
https://rvmentor.com/2019/11/24/ems-vs-surge-suppressor/?fbclid=IwAR3yx1bcMOia0kJcJsOT-fPluEY-jPUA-rmNUwmN0s6qLo0_1M3_i4tQ-P0https://rvmentor.com/2019/11/24/ems-vs-surge-suppressor/?fbclid=IwAR3yx1bcMOia0kJcJsOT-fPluEY-jPUA-rmNUwmN0s6qLo0_1M3_i4tQ-P0

I use an old Frank's booster. Excellent function when boost is needed.

Samsontdog,

Please describe what the EMS does for you? Thanks!

bob213 wrote:
I use both an autoformer followed by an EMS. With more and more larger units(two or three ac units) in campgrounds, voltage goes low a lot more often than people realize. I feel like I'm protected from both low and high voltage.
I couldn't make a choice of one or the other.

I do the same. I used the autoformer for several yrs than I bought the EMS and use both

cavie wrote:

pianotuna wrote:
Hi,

I use an autoformer from Mexico (Sola Basic) that has three "layers" of boost (110, 100, 90) and one of buck (135). I use external surge only, not EMS. I do use an inverter charger that allows me to limit demand on the shore power side of the equation.

The Sola Basic is rated at 4000 VA so is just about a perfect fit for a 30 amp Rv service. They do make 50 amp units, too.

I use it in the winter time, too to let me get best performance from electric heating.

I have "tweeked" the boost to start at 113 volts. I have used it (previous to tweak) on a 100 volt shore power (that is unloaded voltage).

They are a commonly available item in Mexico, and considerably cheaper than the Hughes (which is a good unit).

Because the Autoformer boost voltage and protects from Large surges, that's all. It does not protect like the EMS does. Using both is nessessary. There is a very big differance between Surge protector and an EMS.

Yes there is a big difference, but my system has load support via the inverter/charger and better surge protection than the PD, SG or Hughes units.

EMS that does load shedding automatically is nice--but I do not need that. I'm glad you enjoy your EMS. Would you care to share what it does for you?

I have no use for the units that simply disconnect power at a voltage far too low for my comfort zone.

pianotuna wrote:
Hi,

I use an autoformer from Mexico (Sola Basic) that has three "layers" of boost (110, 100, 90) and one of buck (135). I use external surge only, not EMS. I do use an inverter charger that allows me to limit demand on the shore power side of the equation.

The Sola Basic is rated at 4000 VA so is just about a perfect fit for a 30 amp Rv service. They do make 50 amp units, too.

I use it in the winter time, too to let me get best performance from electric heating.

I have "tweeked" the boost to start at 113 volts. I have used it (previous to tweak) on a 100 volt shore power (that is unloaded voltage).

They are a commonly available item in Mexico, and considerably cheaper than the Hughes (which is a good unit).

Because the Autoformer boost voltage and protects from Large surges, that's all. It does not protect like the EMS does. Using both is nessessary. There is a very big differance between Surge protector and an EMS.

Hi,

I use an autoformer from Mexico (Sola Basic) that has three "layers" of boost (110, 100, 90) and one of buck (135). I use external surge only, not EMS. I do use an inverter charger that allows me to limit demand on the shore power side of the equation.

The Sola Basic is rated at 4000 VA so is just about a perfect fit for a 30 amp Rv service. They do make 50 amp units, too.

I use it in the winter time, too to let me get best performance from electric heating.

I have "tweeked" the boost to start at 113 volts. I have used it (previous to tweak) on a 100 volt shore power (that is unloaded voltage).

They are a commonly available item in Mexico, and considerably cheaper than the Hughes (which is a good unit).

bob213 wrote:
I use both an autoformer followed by an EMS. With more and more larger units(two or three ac units) in campgrounds, voltage goes low a lot more often than people realize. I feel like I'm protected from both low and high voltage.
I couldn't make a choice of one or the other.

I first bought a surge suppressor but found that I needed the voltage boost so I bought an Autoformer. The Autoformer I purchased has surge suppression built into the unit. I'm just curious why you're using both the Autoformer and the EMS?

I have an Autoformer and, so far, have only used it once but it worked great. The cable clamp nut inside the cabinet that is sealed by rivets came loose. I contacted the company and they immediately sent a Fed-Ex shipping label. It's been fixed and is on its way back. I found their Customer Service excellent. And the peace of mind that I won't be starving my AC compressor with low voltage.