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Old 01-29-2016, 06:44 PM   #1
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116 VAC on inverter when running on 12V battery

Silverback 29RE with factory inverter. When running off battery the VAC reads 116V, yellow light on. Is that normal?
Battery is fully charged.
Shore power disconnected.
Thanks,
Joe
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Old 01-29-2016, 07:16 PM   #2
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Is this hard wired in, if so is the converter still connected? If the inverter is not hard wired into the 120 ac circuits then there is something wrong with the inverter assuming you actually have 12.7 dc volts to the inverter input.
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Old 01-29-2016, 07:40 PM   #3
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I am not sure which inverter you have or which yellow light you are referring to but 116 or 117 VAC is within the acceptable range. Does the voltage change when you plug in a load?
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Old 01-29-2016, 11:09 PM   #4
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Quote:
Originally Posted by BendOrLarry View Post
Is this hard wired in, if so is the converter still connected? If the inverter is not hard wired into the 120 ac circuits then there is something wrong with the inverter assuming you actually have 12.7 dc volts to the inverter input.
Yes it is hard wired, and the converter is connected.
Not sure how the converter would enter into the equation, if the unit is not connected to shore power. The sole purpose of the inverter is to run the fridge. I would not want low AC voltage damage my fridge. Perhaps something is wrong with my voltmeter, it was reading 13.9 volts on the battery. The battery had just been charged and the voltage may not have had enough time to settled down. Thank you for your response.
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Old 01-29-2016, 11:13 PM   #5
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I am not sure which inverter you have or which yellow light you are referring to but 116 or 117 VAC is within the acceptable range. Does the voltage change when you plug in a load?
Thank you. I think my question is answered that 116 or 117 VAC is within acceptable range.
At the end of the day running the fridge on the road the VAC does drop to 114.
Sound like I should call Forest River technical support to find out if 114VAC is acceptable.
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Old 01-29-2016, 11:46 PM   #6
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Silverback 29RE with factory inverter. When running off battery the VAC reads 116V, yellow light on. Is that normal?
Battery is fully charged.
Shore power disconnected.
Thanks,
Joe
Yes, the range is normal. The "Yellow LED" indicates the inverter is active and running off battery power. When operating from shore power the "Green LED" will be lit and the inverter is in "Standby Mode".
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Old 01-30-2016, 12:42 PM   #7
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Nominal line voltage is 120 +/- 5%. That is 126 to 114. Most appliances will handle a bigger range than that since power fluctuations are often more like -8 or - 10%...especially in RV parks in the summer.
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Old 01-30-2016, 02:53 PM   #8
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Somme square wave inverter will read only 90 volts AC and this is normal and that will not damage the appliances.
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Old 01-30-2016, 03:04 PM   #9
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Excellent point. I never thought about "modified sine wave" inverters and RMS voltages.
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Old 01-30-2016, 07:08 PM   #10
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The WFCO inverter is a Pure Sine Wave Inverter, so modified sine wave inverters have no bearing on the OP's observation.

I think the Silverback has room for 3 or less batteries, the Cedar Creek has room for 4 batteries. It looks like 2 batteries in picture above. 116V is within 120V +/- 10%% and OK.

If you have 2 12V batteries, consider adding a third battery. If you do, try to match the new battery with the existing batteries. Also check the gauge of the battery cables. I would hope for 2 AWG, not 4 AWG or higher (thinner).

The yellow light indicates "battery back up status". That is normal when not plugged into 120VAC.

http://wfcoelectronics.com/wp-conten...00-Manual1.pdf
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