Welcome, Mark, to the OEM forum.
I’m not sure! I think you don’t mean what most of us understand by “house consumption”. To us, House Consumption means just that - the power/energy you use to run everything in the house - lights, TV, router, appliances, etc. From the look of that screenshot, I suspect P1 is actually the Grid power - CT1 is on the single-core meter tail right next to the meter? - and if so and bearing in mind today’s weather, it’s very likely it would be negative as you would have been exporting power, which by our convention is negative. So it’s probably right.
If P1 really is just the household appliances etc and doesn’t include your P.V. input, it’s definitely wrong (by our convention).
But it looks as if the heat pump (P3) is facing the wrong way - it should be positive when it’s consuming electrical energy.
In summary, our convention is:
Power into the house is positive, whether from the grid or from any other source (P.V, wind, hydro). Power exported back into the grid (or sold to a neighbour?!) is negative. Power consumed is always positive.