I agree with you that use of an area chart implies the filled area has physical meaning - it’s the integral of the metric which is changing with time. e.g. in Fronius Solarweb daily charts the area under the power lines (be it generation or consumption) is what gets filled in, and that makes sense because the integral of power over time is energy.

In PVO the area under the cumulative energy line gets filled in and the integral of cumulative energy over time has no physical meaning. Cumulative energy already *is* the integral.

When plotting a cumulative value it shouldn’t really be plotted as an area. But we’ve all done it before I’m sure.

That PVO has chosen to use an area plot for cumulative energy values as a way to visually distinguish it from the power line is something I’m not going to lose sleep over. I know what the individual plots mean.

I have no solution as changing the chart types is something I think would need to be embedded into the system.