---
title: "Discussion on \"Sizing a solar array from your electric bill: the math, in a dozen lines of JavaScript\" | Hashnode"
description: "Discussion on \"Sizing a solar array from your electric bill: the math, in a dozen lines of JavaScript\". How to turn monthly kWh into a system size and a panel count, what 'peak sun hours' really means, and the derate factor most quick estimates leave out."
url: "https://hashnode.com/posts/sizing-a-solar-array-from-your-electric-bill-the-math-in-a-dozen-lines-of-javascript/6af19dbbb5e779f27e8dbd2f"
---

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# [Sizing a solar array from your electric bill: the math, in a dozen lines of JavaScript](https://calchubtools.hashnode.dev/sizing-a-solar-array-from-your-electric-bill-the-math-in-a-dozen-lines-of-javascript?utm_source=hashnode&utm_medium=feed)

How to turn monthly kWh into a system size and a panel count, what 'peak sun hours' really means, and the derate factor most quick estimates leave out.

2d ago · 4 min read · calchubtools.hashnode.dev  
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-   [#tutorial](https://hashnode.com/tag/tutorial)

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