High AC voltage - Norcold Fridge

Question

Can anyone tell me what the result of high AC voltage would be for our Propane/120v Norcold Fridge?  The shore power fluctuates, sometime as high as 133v.  The rest of my rig is on the EMS which switches me to batteries/inverter over 131v.  I took the fridge off that circuit because power failures are not uncommon and the fridge would take my batteries down fast,  On a separate circuit a power failure will switch it to gas, but it is running without the EMS protection.  Is the high voltage damaging the fridge?  How high is too high?

pianotuna · Answer

Look on the name plate of the fridge. If it says 115 volts, then 133 is pushing your luck. If it says 120 volts, then you are one volt over.

I'd check the voltage at the fridge, and hope for a little bit of voltage drop.

There are buck converters available.

Another solution is a Sola Basic Autoformer.

Consider putting the fridge behind the EMS. Then add a 10 amp battery charger directly to the "house batteries", plugged into the shore power.

dougrainer · Answer

Onan gas gensets the no load voltage range is usually 128 to 132 volts. So, I would not worry about 133 volts. The good thing about 133 volts is, it will make your refer operate better on 120 volts. The higher the line volts on AC the more heat output the Norcold refer element puts out. You really need to get a surge/line voltage device for your shore cord. The Norcold would be the LAST item of 120 appliances in my RV I would worry about 133 volts. Doug

old-biscuit · Answer

Norcold AC Requirements.......... 108VAC - 132VAC
*DC ... 10.5VDC - 15.4VDC

Dometic AC Requirements.......... 100VAC - 132VAC
*DC .... 9.6VDC - 22VDC

DC Voltage would be more of a concern then the AC Voltage

pianotuna · Answer

Nice info on voltages--thank you!

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High AC voltage - Norcold Fridge

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