But some goes for the others in this forum.
Just because it has always been like this with Victron, doesn’t mean the rest of the world does it like that.
I would love it if there would be a feature in where you can set if you want to see it different on the GUI.
That way, it could fit in both worlds.
It’s actually the industrt that does it this way, not just Victron. I have an ancient LINK2000 (ca 1998, back when it wasn’t even Xantrex), and it shows (-) when discharging.
Part of it has to do with the primary purpose of a battery monitor – which is to show SOC, not Amps. If you have a full battery with, say, 800Ah, and you run a -100A current (ie, a load) for 1 hour, you have 800Ah + (-100A)(1 hour) or 700Ah displayed. Or you could internally mix up the signs, so that 800Ah + (100A)(1 hour) = 700Ah. Or you could even just change it internally to acknowledge that positive currents have a negative impact, and calculate it as 800Ah - (100A)*(1hour) = 700Ah. But when you look at a battery as a tank of power, the tank is draining and draining is negative. I even refer to it that way, as in “I see we are down 170Ah.” (note, the word “down” – not “up”).
It is industry standard for battery monitors to refer to outgoing current as “negative” – I don’t think you can find any battery monitor manufacturer that uses it the way you want to.