Hello everybody,
Until today, I was confident I was reading VRM right. Then I was tripped by the attached VRM overview graphic. Where I am, it’s night, so solar is contributing zero power as you can see. The loads seem right. So the power being drawn from the grid (limited to 12 amps by me) is feeding the loads and the left over charging the batteries via a Quattro. I have nothing else (no additional loads, no meters, and no other sources of power). So if I’m drawing 7.3 amps from the grid, some going to my loads, where are all the 10.5 amps charging the batteries coming from? Am I reading something wrong?
Fideri
Grid minus loads should be equal to battery charging (and some for system self consumption).
1342-667 = 675W.
Your batteries are charging at (vxa 53.35v x 10.5A or 560w)
675-560 leaves 115w which is likely the system self consumption.
Looks right to me. AC to DC conversion is never perfectly efficient so 115w is pretty good for losses due to heat
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The 7.3A coming from the grid is at 187V, the 10.5A going into the battery is at 53.4V, the Amps coming from the grid are worth 3.5 times (187/53.4=3.5) the amps going into the battery (ignoring conversion losses). Amps ate not conserved during voltage level changes.
Thanks everyone for the comments. I was obviously reading the graphic wrong. It now makes sense.
F.