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Consumed wh or ah from battery

Wonder if anybody can help me. I have mppt 100/50 and a bmv-712. I can see the total day solar production. But my bmv is showing the total ah use minus solar production. What I’m trying to figure out is how much power out of my batteries I’m using a day. It’s not as easy as just subtracting solar production minus ah of the bmv because it resets everyday (or it’s just cumulative day by day). I installed the Venus gx thinking it would show a graph for each day ah used and solar production per day but no. I can’t look at the bmv everyday in an attempt to figure out how much power I’ve used. I have an aims inverter so a 1500 dollar victron inverter is out of the question. Hope this makes sense. Thank you

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