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Old 06-28-2016, 08:22 PM   #1
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Inverter size.

I have an outside kitchen on my 2015 Palomino Puma 32DBKS with a refrigerator/freezer that is 115v/60Hz with running amps of 1.1 amps and startup amps 4amps (from Haire website) I want to have it turned on and running while I am towing. What size inverter would I need for this task. I searched the archives but most posts dealt with televisions, a/c, microwaves and coffee pots. I just want to be able to tow my trailer with the refrigerator on and when at CG plug in to electric. Can anyone help? Thank you.
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Old 06-28-2016, 08:36 PM   #2
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So fridge max current is 4 amps X 120 vols AC = 480 watts.....so a 500 watt inverter would be sufficient....
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Old 06-28-2016, 08:54 PM   #3
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Some one check my math but with est. power loss- 35 amps of dc? That's going to kill your batteries quick.


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Old 06-28-2016, 09:02 PM   #4
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Originally Posted by fonzie View Post
So fridge max current is 4 amps X 120 vols AC = 480 watts.....so a 500 watt inverter would be sufficient....
Thank you, and am I correct in assuming that while towing my trailer my 2005 Ford Excursion 6.0 power stroke should be able to keep the trailer battery charged enough to run the inverter and refrigerator/freezer.
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Old 06-28-2016, 09:04 PM   #5
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[QUOTE=HONDAMAN174;1242788]Some one check my math but with est. power loss- 35 amps of dc? That's going to kill your batteries quick.


I will be towing the trailer, won't my tow vehicle charge the trailer battery as I am traveling?
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Old 06-28-2016, 09:04 PM   #6
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Thank you, and am I correct in assuming that while towing my trailer my 2005 Ford Excursion 6.0 power stroke should be able to keep the trailer battery charged enough to run the inverter and refrigerator/freezer.
That I can not answer....you will see when towing if it keeps up. Also once fridge is running it should draw about 12 amps on your battery....

https://www.batterystuff.com/kb/tool...-inverter.html
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Old 06-28-2016, 09:10 PM   #7
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Quote:
Originally Posted by fonzie View Post
That I can not answer....you will see when towing if it keeps up. Also once fridge is running it should draw about 12 amps on your battery....

https://www.batterystuff.com/kb/tool...-inverter.html
Thank you for your reply.
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Old 06-28-2016, 09:24 PM   #8
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1. The "Batterystuff" calculator is assuming 100 percent efficiency. No such inverter. Most will run at 70-80%. That's OK. A 400 watt continuous rated inverter will usually give you 700 or more "Startup" watts.

Example at Amazon:

BESTEK 400W Power Inverter DC 12V to AC 110V Car Adapter with 5A 4 USB Charging Ports

Above is not a link, but a description. Cut and paste it in the Amazon search box.


2. If your tow vehicle is rated to supply 20 amps DC to your trailer connector charging line, you should be OK.

BUT............... Remember that your trailer brakes pull power from the trailer battery when they are applied, so the charging line has to provide power to them also. Also, if your trailer battery is not fully charged at the start of the trip, the charging line may be overloaded with the refer running. You should be fine on this as long as the trailer AC shore power is connected for 12 hours or more before you go on the road.
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Old 06-28-2016, 09:35 PM   #9
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Quote:
Originally Posted by Bluepill View Post
1. The "Batterystuff" calculator is assuming 100 percent efficiency. No such inverter. Most will run at 70-80%. That's OK. A 400 watt continuous rated inverter will usually give you 700 or more "Startup" watts.

Example at Amazon:

BESTEK 400W Power Inverter DC 12V to AC 110V Car Adapter with 5A 4 USB Charging Ports

Above is not a link, but a description. Cut and paste it in the Amazon search box.


2. If your tow vehicle is rated to supply 20 amps DC to your trailer connector charging line, you should be OK.

BUT............... Remember that your trailer brakes pull power from the trailer battery when they are applied, so the charging line has to provide power to them also. Also, if your trailer battery is not fully charged at the start of the trip, the charging line may be overloaded with the refer running.
I will have to research my charging line on my truck. Thank you for the info!
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Old 06-29-2016, 01:03 AM   #10
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BUT............... Remember that your trailer brakes pull power from the trailer battery when they are applied, so the charging line has to provide power to them also.
The only time the trailer brakes will draw power from the trailer battery is if the break away switch is engaged. The trailer brakes use power from the tow vehicle when being towed.
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