Observed arrival · 2026-08-26
SolarResourceHub’s Tariff-Aware Payback Engine
A browser-based solar calculator that simulates every hour of a year against utility tariffs, export rules, financing choices, and system assumptions.
Field notes
The engine combines a selected utility rate schedule with roof orientation, usage, storage, financing, and equipment assumptions, then prices each simulated hour separately before projecting 25 years of cash flow. Its example exposes details ordinary solar calculators often hide: an 18% loan dealer fee, a 20% battery backup reserve, and 576 distinct California export-price values. The page also links to PVWatts, OpenEI, DSIRE, LBNL, and EIA as reference sources.
Observed signals
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Editorial observations of this landing page, not a rating.
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