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Is the "20 percent rule" for solar actually worth it?

Started by Brandon Alvarez9 · Jul 27, 2026 · 👁 5 views · 0 replies

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Brandon Alvarez9 NewcomerOP

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joined Jun 2012

#1 · Jul 27, 2026

I keep seeing this advice about overbuilding your solar capacity by 20% to save money down the road. It sounds like a smart way to future-proof your setup, but I wonder if the upfront cost is too high. Does anyone here actually use this rule or is it just hype?

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