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How big should your home battery be? First the type, then the size

A fixed home battery at 471 euros per kilowatt-hour, and the most expensive plug-in battery at around 470. Storage is not what makes the difference. This article walks through the order: what you ask of the battery, how it connects to your house, who controls it, and only then how big. With the measured curve of one house, and what that curve does not say.