GlennWest Posted June 18, 2020 Report Share Posted June 18, 2020 (edited) Looking at Victron specs on a 48/8000 Quattro. Output is 8000 VA, 6500 watts. ???? Magnum on their 44448pae states 4400 watts. No mention of VA. So is victron really a 6500 watt unit where Magnum is what they state? I am trying to size a system and 1500 watts is a lot. Edited June 18, 2020 by GlennWest Quote Link to comment Share on other sites More sharing options...
GlennWest Posted June 18, 2020 Author Report Share Posted June 18, 2020 Ok. Peter at PKYS has a write up about this. Basically anything that create a magnetic field you use VA rating. So acs have electrical motors, washing machines maybe. Mine is new inverter style. Dc motor. Question that one. Drills, vacuum cleaner, fans. Quote Link to comment Share on other sites More sharing options...
oldjohnt Posted June 18, 2020 Report Share Posted June 18, 2020 Glenn, way back when practicing I used all this VA versus Watts on a regular basis, but I've slept since lol. Basically Power in Watts (aka True Power) = Volt Amps (aka Apparent Power) X Power Factor. In a pure resisitve load the PF is Unity One so Watts are equal to Volt Amps. HOWEVER if there are inductive loads such as AC or Refrigerator compressor motors or transformer devices, current lags the voltage yielding a less then one Power Factor, so if the PF was 0.8 and the VA (Apparent Power) was 8000, the Watts (True Power) would be 8000 x .8 or 6400. Sorry I have no specs, data or manuals as to the rating of the units in question John T Tooooooo longggggggggggg retired n rusty on this so no warranty Quote Link to comment Share on other sites More sharing options...
GlennWest Posted June 18, 2020 Author Report Share Posted June 18, 2020 I just learning this. When using inverter system as large as I getting , you basically need the next size. Quote Link to comment Share on other sites More sharing options...
oldjohnt Posted June 18, 2020 Report Share Posted June 18, 2020 Glenn, if there's only a resisitve load (heating units, unity PF, W = VA) attached that's one thing BUT if you power an AC or Compressor Fridge IE motors etc., they have a less then one PF. Again W = VA x PF,,,,,,,,,,,,,,or VA = W/PF............ Example 8000 VA = 6400 Watts/.8 Clear as mud Im sure lol John T Quote Link to comment Share on other sites More sharing options...
GlennWest Posted June 18, 2020 Author Report Share Posted June 18, 2020 Actually the VA figure is the rating of inverter. Watts is less. So my ac, fridge dishwasher, dryer, washing machine, refrigerator will fall under VA. I was thinking backwards. Lol. So I should be good with 8K Quattro. That actually less than dual Magnums. Quote Link to comment Share on other sites More sharing options...
oldjohnt Posted June 18, 2020 Report Share Posted June 18, 2020 54 minutes ago, GlennWest said: I was thinking backwards. Lol DONT FEEL BAD I'm not sure which direction my thoughts are lol and with age its getting worse grrrrrrrrrrrrrr John T Quote Link to comment Share on other sites More sharing options...
.thumb.jpg.8e7515f6531fe4ed872eaa7b0f6c22c1.jpg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.