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Published — 8 September 2026 ⏭ Undecided

The Hidden Problem With Home Batteries

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How My Home Battery Really Performed (2 Years Later). Start your 7-day free trial + unlock 4 extra months of Surfshark VPN — head to https://surfshark.com/undecided or use code UNDECIDED at checkout! My January electric bill came to $336, even with solar on the roof and 20 kWh of home battery storage on the garage wall. After 12 months of utility bills and circuit-level data, the solar battery math got weird. The panels saved money. The battery cost about $207 a year, thanks to net metering, round-trip losses, and the way Massachusetts credits rooftop solar. But I would still buy it again. So is a home battery actually worth it for resilience? Or is the whole thing just an expensive backup plan?

Watch Why China Built the World's Largest Air Battery https://youtu.be/N3EqEocLPJk?list=PLnTSM-ORSgi7uzySCXq8VXhodHB5B5OiQ

Video script and citations:
https://undecided.tech/how-my-home-battery-really-performed-2-years-later/

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Chapters
00:00 - Intro
02:31 - What it actually does
05:41 - The Bill
07:39 - I told you this two years ago, and I was wrong
08:42 - What a stored kilowatt-hour costs
09:52 - So where did the money come from?
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