Yahoo Message Number: 75161 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/75161)
Just had a discussion with a fellow RV'er. He just installed a residential refrigerator. The installer told him that he needed a sine wave inverter instead of his "equivalent" sine wave type. I see no reason why that's required. Is there something I'm missing here? I am assuming he has the required power and adequate batteries to run the fridge. Motor windings make good integrators and controls are usually run off of dc.
Judy n Joe
98 Intrigue 10578
Yahoo Message Number: 75164 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/75164)
Judy n Joe,
You are referring to "pure" sine actually. Some refrigerators depending upon the type of motor, number of armatures and windings might work allot more efficiently with the "pure" sine wave power. Checking with the manufacture....if they have had experience with their refrigerator model under both conditions.
I know there is a number of fellow RV'ers running the 197 SAMSUNG residential refrigerator and Samsung techs actually say that it is ok to have a 'modified' sine wave inverter with that particular model. The compressor is actually pretty small and runs alot on a very small amount of electricity
On other appliances like microwaves and coffee makers, you actually get better performance with 'pure' sine wave. My portable heater did not like 'modified' sine wave and did the 'magic blue smoke' thing and that was it for that appliance. I have heard others complain about replacing their coffee makers frequently while running just on the inverter.
Some appliances like portable computers don't care because you have a transformer in the way but home computers might have an issue when using 'modified'.
I had too many appliances that were choking on the 'modified' wave, not the refrigerator though, so I just swapped it for a 'pure' sine wave and have much happier appliances that run more efficient like the microwave.
Dallas 2004 intrigue