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Solar & home energy

Measured solar production, the water heater that follows it, and whether any of it pays off.

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  1. 1/3

    Smart Water Heater with Home Assistant and Shelly device

    Replacing a dumb timer with a Shelly Plus 1 smart switch to control a water heater via Home Assistant, with vacation detection to avoid heating when nobody's home.

  2. 2/3

    Two Years of Solar: The Real Numbers, the Real ROI

    12 panels, 3 micro-inverters, no battery — here is what the first 24 months actually produced, self-consumed, exported, and earned.

  3. 3/3

    The Smart Water Heater, 4 Years Later: Solar + Off-Peak Orchestration (v2)

    Two water heaters on a Heures Creuses tariff, 12 panels and no battery - the v2 of my water heater orchestration, with real YAML and real numbers.