A year of solar + Powerwall + heat pump data: correlations of 0.89 and 0.90

Unconfirmed: A Reddit user (u/v_aravind) posted in a community forum an analysis of one year of data from a house with solar panels, a Powerwall battery, and a Cosy heat pump. According to the post's title, solar generation tracks sunshine with a correlation coefficient of r = 0.89, and heating demand tracks cold with r = 0.90. The available text includes only the post's title and links; it does not describe the methodology, location, weather sources, or the exact measurement period. This is an individual observation, not an official or verified source.

• Solar generation vs. sunshine: r = 0.89, according to a Reddit user.
• Heating demand vs. cold: r = 0.90 in the same installation.

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