Reverse-Engineering the Thermal Performance of a sendom.pl House
How we built a calibrated six-zone thermal model of a sendom.pl prefab house using Home Assistant sensor data, and what it revealed about insulation quality and HRV efficiency.
Energy
Poland's grid at 46% renewable — what a year of 15-minute data reveals
I analyzed 365 days of Polish grid data at 15-minute resolution. Poland is already at 46% renewable share — and the data challenges several popular assumptions about intermittency, costs, and the optimal energy mix.
The 10H wind law — how one regulation cost Poland billions
PiS introduced the 10H distance rule in 2016, effectively blocking onshore wind development. The cost: ~7 GW of clean energy not built, PLN 40-60 billion in higher electricity bills, and ~40 million tonnes of unnecessary CO2.
Setting Up a Wind Turbine
A cheap wind turbine, a homemade braking system, and a November storm that changed how I think about control systems.