Microwave on PSW vs MSW Inverter- Results
I have been using a MSW inverter to run the microwave for several years now, and decided to try a PSW inverter. I expected the microwave to run a little better and for the inverter to draw more amps ...
Forum Discussion
Got the Kill-A-Watt going. We now have a match between the AC watts and the DC draw. Also I tried another MW in the stick house.
RV inverter results: 116.9v no load , 161 amps DC draw MW on. (MW rated 1510w in, 1100w out--old LG MW from 2001)
111.5v, 15.3a, 1613w (going up and down a bit),60Hz, 0.94PF, 1694VA
Stick house MW (fairly new LG rated 1450w input, 1000w out) 115.2v no load:
111.9v, 14.72a, 1458w, 60hz, 0.88PF, 1650VA
So it is also about the PF of the microwave and it looks like the old one now wants more input than when new? Anyway the inverter is working properly, which is the idea.
I tried a resistive load ( a kettle) and the DC draw was around 91 amps, same as when it was on the MSW inverter before. So that came out right for PSW/MSW vs resistive loads being the same. (The MW is inductive so big diff there)
I was not getting inverter overload with my MSW before with the MW, so I did not ever have to try that trick of running a resistive load at the same time as the inductive to get it to behave. That would not apply to the PSW inverter AFAIK.
RV inverter results: 116.9v no load , 161 amps DC draw MW on. (MW rated 1510w in, 1100w out--old LG MW from 2001)
111.5v, 15.3a, 1613w (going up and down a bit),60Hz, 0.94PF, 1694VA
Stick house MW (fairly new LG rated 1450w input, 1000w out) 115.2v no load:
111.9v, 14.72a, 1458w, 60hz, 0.88PF, 1650VA
So it is also about the PF of the microwave and it looks like the old one now wants more input than when new? Anyway the inverter is working properly, which is the idea.
I tried a resistive load ( a kettle) and the DC draw was around 91 amps, same as when it was on the MSW inverter before. So that came out right for PSW/MSW vs resistive loads being the same. (The MW is inductive so big diff there)
I was not getting inverter overload with my MSW before with the MW, so I did not ever have to try that trick of running a resistive load at the same time as the inductive to get it to behave. That would not apply to the PSW inverter AFAIK.
