Energy Advisor Tools & Open Data
Free, interactive tools and a structured open dataset on California electricity rates — built on the same billing engine that powers our bill analysis. No login, no PII, free to reuse.
US Electricity Rate Database
Peak hours, per-kWh prices, seasons, and tiers for 6,101 residential plans across 2,712 US utilities — the flagship plans verified against current customer rate data. Every plan is a queryable JSON endpoint.
Browse 6,101 plans →Peak Hours Database
Exact peak and off-peak windows and prices for every PG&E, SCE, and SDG&E residential plan, with an hour-by-hour visualizer.
Explore 10 plans →Rate-Plan Comparison
An interactive calculator plus modeled annual costs by household type — find the cheapest plan for how you actually use power.
Compare plans →Balcony Solar Calculator
Compare plug-in balcony solar kits, with and without a battery, by cost, yearly production, savings, and payback for your state and home.
Estimate my payback →Ohio Rooftop Solar Calculator
Is buying solar worth it in Ohio? See your break-even year on a payments-over-time chart — accounting for net metering, the expired federal tax credit, panel warranties, and inverter replacement.
See my payback →Why Is My Bill So High?
Answer six quick questions and get a ranked diagnosis of what's driving your electric bill — weather, a new appliance, a rate hike, peak hours, or a billing glitch — with fixes.
Diagnose my bill →Appliance Cost Calculator
See what every appliance costs to run per year at your rate, ranked biggest to smallest, so you know exactly where to cut.
Find my energy hogs →Plug-In Solar Laws by State
Is balcony solar legal where you live? A state-by-state tracker of plug-in solar laws, what's passed, what's pending, watt limits, and effective dates.
Check my state →Plug-In Solar Readiness Checker
Answer six quick questions about your home, space, and state and get a personalized readiness score, your legality status, and what would most improve your payback.
Check my readiness →Battery Backup Calculator
Pick the essentials you'd run in an outage and your battery size, and see exactly how many hours it lasts — with realistic, duty-cycle-aware runtimes, not just nameplate watts.
Size my backup →Landlord & HOA Letter Generator
Generate a professional letter requesting landlord or HOA permission for plug-in solar — auto-cited to your state's law. Copy or download it free.
Draft my letter →How Data Centers Raise Electricity Costs
Interactive maps and step-by-step explainers of how data-center load drove up power bills across 10 documented US regions — from Data Center Alley in Northern Virginia to Texas, Ohio, Georgia, Louisiana, and more.
See how it reaches your bill →Compare Energy Suppliers by State
In deregulated states you can choose your electricity or gas supplier. Compare every certified offer — price, term, renewable %, fees — against your utility's benchmark rate.
Open dataset for developers & AI
All of the above is published as structured JSON — peak windows, per-period prices, and modeled plan rankings across PG&E, SCE, SDG&E. Compiled by Energy Advisor from 3 utilities' 2026 tariffs. Free with attribution (CC BY 4.0).
More free energy tools
Data last updated June 18, 2026. Compiled by Energy Advisor from published utility tariffs.