Peak day incident solar radiation

[orel]

Hello everyone!
I’m new with rhino and grasshopper,
trying to automate an Hourly Plot (Heatmap) that shows the Daily Peak Incident Radiation (W/m²) for a specific facade.

The Issue: Currently, I’m manually exporting LB Real-Time Incident Radiation values to Excel, normalizing by area, and finding peaks.

1. Is there a way to make LB Hourly Plot automatically display the Max W/m² value (peak) of a mesh per hour, instead of individual face values?
2. I’m seeing a >50% discrepancy compared to a consultant’s TMYx results, although patterns match. Could this be a unit scaling issue (Rhino is in Meters) or a Sky Density setting?

Attached:
Script screenshot.

Thanks!