# Power Portable (https://power-portable.com)

> Independent portable power station specification, live retailer price, and US outage/solar sizing database.

## What Power Portable Covers
- Live portable power station price comparison table ranked by verified cost per watt-hour ($/Wh) and lifetime cost per kilowatt-hour ($/kWh): https://power-portable.com/
- Verified product specification pages for 265 portable power stations, bundles, and expansion batteries: https://power-portable.com/power-stations/{id}
- Interactive sizing and cost tools:
  - Runtime and battery sizing calculator (30 DOE/ENERGY STAR appliances): https://power-portable.com/calculators/runtime
  - Solar generator recharge time calculator (NREL PVWatts V8 by state and month): https://power-portable.com/calculators/solar-recharge
  - Generator vs power station cost per kWh calculator (EIA retail rates): https://power-portable.com/calculators/generator-vs-power-station
- 51 US state outage, electricity rate, and solar irradiance dataset (EIA-861 Table 11.3, EIA Table 5.6.A, NREL PVWatts V8): https://power-portable.com/states

## How Data Is Sourced and Verified
- Every product specification comes from the manufacturer's official product page or user manual PDF, verified in two passes with saved source excerpts.
- Missing specifications are displayed as "not stated" rather than estimated.
- Retailer prices are refreshed every 6 hours from direct brand feeds and affiliate product feeds.
- Picks and rankings are computed from manufacturer specs and current prices using published formulas. We do not run hands-on hardware tests.

## Methodology & Open Dataset Links
- Methodology and formulas: https://power-portable.com/methodology
- Live JSON price and spec dataset: https://power-portable.com/data/table.json
- State outage, electricity price, and solar hub: https://power-portable.com/states
- Sitemap index: https://power-portable.com/sitemap.xml