I'm looking for confirmation of the actual idle power draw for a Multi II 48V 15kva unit. The spec sheets for other Victron inverters are massively off so I don't believe them. The spec sheet says 55W. Can I count on that in my system design? I am having to redo an installation at my expense because it doesn't meet the system idle power requirements because the Quattros don't meet their specs.
@twistedtree , I wouldn't agree that they are way off, it does depend on a number of factors - firmware version installed, configuration file, ambient temperature, location of inverter. At the moment I can see that one of my installations with an MPII 48/3000 has a parasitic drain of 18W and the data sheet states 13W. All of my system installs with MPll 48/15000 are running suppling load so I can't give you a precise answer to your question right now, perhaps in couple of weeks when I next commission this inverter model.
Its is not prudent to design a system based on and so close to the zero load power value. The example above is a 44kW/h annual difference in consumption of the published figure versus the actual figure which equates to installing an additional approx 100Wp of solar. Anthony
