Using a modified sine wave inverter on a Frigidaire?

Marv Hoag wrote:
I was looking hard at a Fisher & Paykel 17cu ft French Door refrigerator. The measurements were right for a 1200 LRIM swap. Called the manufacturer today. I was informed they would not guarantee the unit if it was used with a MSW inverter, they would guarantee if used with a PSW inverter. Bummer, I have a 2000w MSW inverter. Back to the drawing board.

I'm going to add that the F&P frig has a lot of electronics, so it didn't surprise me that they wanted the PSW.

I'm going to get out my ruler and shoe horn and have another look at the Samsung RF 197. First I'm going to verify for myself that Samsung indeed approves of the MSW inverter.

Here's your answer straight from Ms. Samsung

Samsung MSW inverter question

2oldman wrote:
We have peer review.

So much of peer review around here is tainted. If someone does go against the forum anointed super product they are attacked. Peer review? What a joke, at least around here.

Rich D. wrote:

2oldman wrote:
If MSW works for you, great. A good PSW is much less risk. Not zero, less. I think it's only fair to people reading this that they're aware of that.

X2, exactly!

Harold1946, don't expect others to do your research for you. I find much testing and documentation on sites that support "off the grid" living. I'm sure you can find them too if you really want to. There is only one type of PURE sine wave inverter which almost exactly duplicates 120 VAC household power and then there are many types Modified square wave inverters. The better the MSW, the more steps it makes to approximate a pure sine wave thereby the fewer chances of over-heating, higher power consumption and reduced motor life. MSW inverters are NOT created equally.

And, of course (like the TV commercial with the young lady and the "French Model" date) just because it is on the internet does not make it true. 14 years is a long time in the world of electronics. If your setup worked for you all this time, great. It does not mean a new energy efficient refrigerator won't be harmed by a bad MSW inverter while costing more battery consumption at the same time.

I simply asked for onereference of a link to the " thousands of them" you say are available. I would have thought you would be willing to share.
Northern Arizna Wind & Sun does not do this type of testing. I have been doing business with them since 1983. They designed the solar system for my S&B and MH. If you check with them,they will inform you that there have been several improvments to MSW inverters in the last decade, making them produce much cleaner power.
FYI; My 2009 coach has a MSW inverter powering an Amana energy star refer, an Amana 1500 watt microwave, 32" LG LED TV.
I will agree that there are bad MSW inverters, but there are also bad SW inverters.
Why in the world are you a member here if you are not willing to share information :S
I might add there are 140 Siena motorhomes, all having MSW inverters, some even with washers and dryers.

topflite51 wrote:
. Or is it just an old wives tale that PSW is better than MSW?

No, it's usually an old RVers tale that certain things don't perform well on MSW.

There have been many posts on here about it. It may be a refer or a TV or a Microwave, but I can't recall a single one about how something didn't work well on PSW. Since this thread is about refrigerators, my recollection is that most do work ok on MSW. Other things, not so well, and many people run everything on the inverter, not just the refer.

We don't need no stinkin' studies. We have peer review. If that doesn't convince you, then that's just fine with me.

I was looking hard at a Fisher & Paykel 17cu ft French Door refrigerator. The measurements were right for a 1200 LRIM swap. Called the manufacturer today. I was informed they would not guarantee the unit if it was used with a MSW inverter, they would guarantee if used with a PSW inverter. Bummer, I have a 2000w MSW inverter. Back to the drawing board.

I'm going to add that the F&P frig has a lot of electronics, so it didn't surprise me that they wanted the PSW.

I'm going to get out my ruler and shoe horn and have another look at the Samsung RF 197. First I'm going to verify for myself that Samsung indeed approves of the MSW inverter.

bluebirdPT36 wrote:
Harold1946,
Why don't you buy a quality VOM, infrared therometer, a MSW and a PSW inverter and run the test? Prove that a MSW inverter is just as good and efficient(or better and more efficient) as a PSW inverter. Report back to us when you are finished with the test.

Why should Harold run the test, he has nothing to prove. All those claiming that PSW is better than MSW, should do the funding for an independent lab to do the testing. Or is it just an old wives tale that PSW is better than MSW? I personally would like to know before I spent my MAD MONEY. :b

bluebirdPT36 wrote:
Harold1946,
Why don't you buy a quality VOM, infrared therometer, a MSW and a PSW inverter and run the test? Prove that a MSW inverter is just as good and efficient(or better and more efficient) as a PSW inverter. Report back to us when you are finished with the test.

Not interested in doing so. My MSW inverter and refer are doing fine.
Thats why I asked whom was doing the testing. There are many inverter manufacturers as well as refrigerator manufacturers and I wondered where all this data was available at for the hundreds of test results.

Harold1946,
Why don't you buy a quality VOM, infrared therometer, a MSW and a PSW inverter and run the test? Prove that a MSW inverter is just as good and efficient(or better and more efficient) as a PSW inverter. Report back to us when you are finished with the test.

Rich D. wrote:

2oldman wrote:
If MSW works for you, great. A good PSW is much less risk. Not zero, less. I think it's only fair to people reading this that they're aware of that.

X2, exactly!

Harold1946, don't expect others to do your research for you. I find much testing and documentation on sites that support "off the grid" living. I'm sure you can find them too if you really want to. There is only one type of PURE sine wave inverter which almost exactly duplicates 120 VAC household power and then there are many types Modified square wave inverters. The better the MSW, the more steps it makes to approximate a pure sine wave thereby the fewer chances of over-heating, higher power consumption and reduced motor life. MSW inverters are NOT created equally.

And, of course (like the TV commercial with the young lady and the "French Model" date) just because it is on the internet does not make it true. 14 years is a long time in the world of electronics. If your setup worked for you all this time, great. It does not mean a new energy efficient refrigerator won't be harmed by a bad MSW inverter while costing more battery consumption at the same time.

I did not expect anyone to do research, just reference your statement of lab research that has been done. Guess you must have none, thanks anyway.

2oldman wrote:
If MSW works for you, great. A good PSW is much less risk. Not zero, less. I think it's only fair to people reading this that they're aware of that.

X2, exactly!

Harold1946, don't expect others to do your research for you. I find much testing and documentation on sites that support "off the grid" living. I'm sure you can find them too if you really want to. There is only one type of PURE sine wave inverter which almost exactly duplicates 120 VAC household power and then there are many types Modified square wave inverters. The better the MSW, the more steps it makes to approximate a pure sine wave thereby the fewer chances of over-heating, higher power consumption and reduced motor life. MSW inverters are NOT created equally.

And, of course (like the TV commercial with the young lady and the "French Model" date) just because it is on the internet does not make it true. 14 years is a long time in the world of electronics. If your setup worked for you all this time, great. It does not mean a new energy efficient refrigerator won't be harmed by a bad MSW inverter while costing more battery consumption at the same time.