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kW vs kWh for Solar: Why Rated Power Doesn't Tell You How Much Energy You'll Actually Get

kW vs kWh for Solar: Why Rated Power Doesn't Tell You How Much Energy You'll Actually Get

A "5 kW" solar system doesn't produce 5 kWh every hour — kW measures the rate of production (power), kWh measures the total amount produced (energy), and conflating these is the most common error in solar estimates. Here's how "peak sun hours" translates rated kW into estimated daily kWh, why capacity factor explains why solar's "rated power" and "actual output" differ so much, and how to compare a system's estimated production against your electricity bill's kWh usage.

Jun 14, 2026
Food Calories, Thermic Effect, and Why the Label Isn't the Whole Story

Food Calories, Thermic Effect, and Why the Label Isn't the Whole Story

Food calorie labels use Atwater values from the 1890s and don't account for the thermic effect of food, the difference between raw and cooked, or gut microbiome variation. Here's what food calories actually measure, why protein delivers fewer net calories than the label suggests, and why individual calorie extraction varies.

Jun 12, 2026