Invertor size for a refrigerator

[ronmc]

I have a refrigerator rated at 6.5 amps max. Would a 1000 watt pure sine inverter be sufficient? Nothing else would be on the circuit.

[2oldman]

household refer and inverter2009
Household refer Class A 2009
residential fridge- boondocking 09

[MEXICOWANDERER]

Best to do an at-home Kill-A-Watt analysis for at LEAST A WEEK, to include open door loss makeup. Add an absolute minimum of 115% for inverter loss. Add 15% MORE for CER charge efficiency ratio for the batteries and that'll give you a rough idea of what your BATTERIES are going to ask for.

[DaveG39]

But how many batteries do you have to keep the fridge running without batteries going dead. Better do a usage calculation.

[mena661]

1500-2000W should cover it.

[rkentzel]

There a few refer out there now that are three phase run from inverter boards for it. Plus it may have two to three boards running different functions. I would only want a psw inverter for mine. I speak from being authorized service for the majors now retired. I have seen people who go out and spend all kinds of money tearing out there rv frig and replacing it with 2500-3000 dolar refer and cheap out and put some cheap junk modified sine wave inverter in makes me cringe.

Most all the boards are under in the back or on the back panel not a normal installation so you would have to unistall it for a tech to repair it. If its just static coil design just stick it in leave so room for air circulation and put in which one you want. Ya and I know some of you say you run MSW on you big dollar fridge but you pay for that at some point.

[MrWizard]

our fridge only needs 100w to run, but pulls 900w to start the compressor,
our inverter is 1250w continuous, 1875 for 30 minutes, 2500w for 10 seconds

we need more info about the fridge, make, model#, size

look at the compressor, get the listed LRA amps, from the data plate

LRA is Locked Rotor Amps, the inverter must be able to deliver the LRA for what ever seconds is needed to get the compressor running

[hmknightnc]

6.5 amps at 120 is roughly 800 watts max running. compressors are generally 2.5 to 3x starting surge so around 2000 watts.

So if the inverter is a 1000w contineous duty with 2000w surge it should but on the edge. If that is a typical cheaper brand inverter that is 1000w surge and 500w contineous then nope.

Look at the actual ratings on the spec sheet not the box label/title. Also need to look to see if the individual outlets are rated at full capacity or if each provides half (also typical of no name brands)

[BFL13]

Others have posted they have had success with running their fridges on 120v with 1000w inverters. I doubt it matters whether PSW or MSW for a fridge. Only a few things won't work on MSW.

Of course, if it is not a big dollar issue, a PSW will be sure to run anything, so that would be the choice in that case for max flex.

[dbbls]

Amps times volts equals watts. Also inverters are not 100 present efficient.