I have noticed that the "DC in" reading on my new EasySolar 24/1600/40 is quite inaccurate. This has been confirmed using a multimeter on the positive DC lead to the unit - when the multimeter reads 2.2A, for example, the inverter is reading 3A (read using VEConfig). When the multimeter is reading 3.9A, the inverter is reading 5A.
So as you can see, the inverter is reporting >20% too high. This is a problem, because in combination with a BMV-712, this reading is used to calculate DC loads. When the inverter is reporting too high like this, quite often I see a "negative" DC load, since the inverter alone is reporting a higher current draw than the total current from the battery (as read by the BMV).
Is there anything which can be done to make this more accurate? Perhaps the accuracy improves as load increases, but it is still quite bad at low loads.
