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Old 02-24-2018, 01:33 AM   #1
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Whirlpool fridge watts?

Trying to figure out how many watts the standard whirlpool fridge draws on 2018 palazzo 33.3. I know it varies substantially but an average would help. I want to do some more detailed calculations on amp hour usage in battery bank while boondocking. Anyone done this with our palazzo fridge?
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Old 02-24-2018, 06:50 AM   #2
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going to Whirlpool's website or looking at your owners manual for the fridge would be the best way to find an 'average', even though that itself is just really a 'guesstimate'... there's no way for anyone to really know how to answer the question... most of us don't 'track' or have any way to know our own usage, and there's no way to really 'only' track the fridge, since other things are being used simultaneously. It is what it is. The Magnum Inverter will tell you what the Voltage of the batteries are, and your AGS will kick on the Generator and charge them as needed, with any Solar helping to 'slow' the generator's usage. The more Solar, and the more Sun, will certainly limit the usage of the generator, of course.

enjoy!
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Old 02-24-2018, 07:14 AM   #3
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Actual tracking can be done by using a Kill A Watt device plugged inline with the power cord.

That doesn't help unless someone has done that, but if you find the energy guide ( yellow card ? printed by the Government ), you can calculate the approximate daily energy use buy dividing the the yearly # by 365 days.

If it lists 730 KWHs a year, that's 2 KWHs or 2000 watts a day. Divide that by 12 volts to come up with an approximate daily AH use.
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Old 02-24-2018, 07:32 AM   #4
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Quote:
Originally Posted by twinboat View Post
Actual tracking can be done by using a Kill A Watt device plugged inline with the power cord.

That doesn't help unless someone has done that, but if you find the energy guide ( yellow card ? printed by the Government ), you can calculate the approximate daily energy use buy dividing the the yearly # by 365 days.

If it lists 730 KWHs a year, that's 2 KWHs or 2000 watt-hours a day. Divide that by 12 volts to come up with an approximate daily AH use.
FTFY

And I second the Kill A Watt meter:

https://www.amazon.com/P3-P4400-Elec.../dp/B00009MDBU
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Old 02-24-2018, 11:46 AM   #5
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Quote:
Originally Posted by twinboat View Post
Actual tracking can be done by using a Kill A Watt device plugged inline with the power cord.

That doesn't help unless someone has done that, but if you find the energy guide ( yellow card ? printed by the Government ), you can calculate the approximate daily energy use buy dividing the the yearly # by 365 days.

If it lists 730 KWHs a year, that's 2 KWHs or 2000 watts a day. Divide that by 12 volts to come up with an approximate daily AH use.
Thanks. Understood. I don't have my unit yet, which is probably why some of you are confused. I supposedly get it Next week. So I have no manuals. Planning ahead. Online I found a similar whirlpool and it said 387kwh per year on the yellow sheet. I run into problems because I didn't know whether to divide by 120 or 12 because the fridge runs on 120v right? Help!
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Old 02-24-2018, 11:47 AM   #6
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FTFY

And I second the Kill A Watt meter:

https://www.amazon.com/P3-P4400-Elec.../dp/B00009MDBU
Thanks! Ordered one. I will do my own checking when I get out boondocking.
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Old 02-24-2018, 12:15 PM   #7
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Watts is watts, regardless of the volts.

So 387 KWH ÷ 365 days = 1060 watts a day. 1060 watts ÷ 12 volts = 88 AH.

Add in inverter idle losses of 12 to 72 AH, depending on the model, and about 10% loss due to inverter inefficiency and you have your usage, just for the fridge.

If you run your generator or have enough solar to cover the draw, there will be no AH used during those times.

Your 4 battery rig is going to be around 400 AH, with the typical batteries used in RVs.
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Old 02-24-2018, 02:13 PM   #8
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Quote:
Originally Posted by twinboat View Post
Watts is watts, regardless of the volts.

So 387 KWH ÷ 365 days = 1060 watts a day. 1060 watts ÷ 12 volts = 88 AH.

Add in inverter idle losses of 12 to 72 AH, depending on the model, and about 10% loss due to inverter inefficiency and you have your usage, just for the fridge.

If you run your generator or have enough solar to cover the draw, there will be no AH used during those times.

Your 4 battery rig is going to be around 400 AH, with the typical batteries used in RVs.
Thank you so much. I appreciate it. I was up late thinking about this and the 12v vs 120v and AH was all running together. I think I got it now. This post really helped me!
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Old 02-25-2018, 06:59 PM   #9
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If you look on your model number tag you will see the average amp use.

"Ohm's law" Volts times amps equal watts.

Hope this helps!
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Old 03-16-2018, 01:54 PM   #10
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Quote:
Originally Posted by twinboat View Post
Watts is watts, regardless of the volts.

So 387 KWH ÷ 365 days = 1060 watts a day. 1060 watts ÷ 12 volts = 88 AH.

Add in inverter idle losses of 12 to 72 AH, depending on the model, and about 10% loss due to inverter inefficiency and you have your usage, just for the fridge.

If you run your generator or have enough solar to cover the draw, there will be no AH used during those times.

Your 4 battery rig is going to be around 400 AH, with the typical batteries used in RVs.

So, 387 KWH ÷ 365 days = 1060 watts a day. 1060 watts ÷ 12 volts = 88 AH, as twinboat says, is right on, but here's a little cheat you can use to account for the inverter loss. Replace the 12 with a 10. This will give you a good estimate of AHs which includes inverter loss.

So, 387 KWH ÷ 365 days = 1060 watts a day. 1060 watts ÷ 10 volts = 106 AH. This should be a slight over estimate but it's better to over estimate than to under estimate.
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