Hidden Watt

Updated 2026-07-13

This week's biggest off-grid solar kit price drops

Real, observed drops from our 6-hour pipeline. Each row shows what the price was, what it is now, the retailer where we observed it, and one line of what the kit is still missing. No estimates, no marketing language — just the numbers we recorded.

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No qualifying drops in the last 14 days. Check back Tuesday.

Browse all tracked kits →

How this list is built

  • We pull retailer prices for tracked kits every six hours and write each observed price change to a per-kit history file.
  • For this list, we look for kits whose most recent observed price change was a drop of at least $20, observed within the last 14 days.
  • "Last observed" is the timestamp from our pipeline — not the retailer's last sale date. If the price went back up after our last check, we'll show that too on the next run.
  • We do not publish forward-filled or interpolated prices. Each row is a real observation.

Methodology and data sources: Real build cost · Sources

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