Free calculator, 20 honest guides, and zero installer upsell. Plug your numbers in below — or open the full calculator.
Change any value to recalculate.
Three honest playbooks. Each tier names what to do this quarter, what it costs, and the guide that walks you through. No "complete electrification in 90 days" fantasies.
Three afternoon tasks. Zero installer needed.
The sweet spot. One major switch, real ROI.
Solar + storage + EV + heat pump.
Five purpose-built tools, each takes 60 seconds. No signup, no email gate, no installer kickback. Sourced from EIA, NREL, Energy Star and DSIRE.
Any appliance, any country. Daily, monthly, yearly cost in USD / GBP / EUR.
Open → ☀️State-by-state payback, before-and-after the July-2025 federal credit elimination.
Open → 🔥4 climate zones × 4 fuels × HSPF rating. Real annual cost side-by-side.
Open → 🚗Real per-mile and per-year cost. Tesla, Ford, Hyundai, GM, Rivian. Home vs DC fast vs Supercharger.
Open → 📊Solar + heat pump + EV in one cash-flow model. Single break-even year.
Open → 📚Honest deep-dives sourced from EIA, NREL and DSIRE — solar, EV, heat pump, appliances and savings tactics.
Browse the library →Every figure on this site is tied to a public data source. If we cannot source it, we do not print it. No proprietary "expert estimates", no installer marketing math.
All state-average residential electricity rates from the US Energy Information Administration. Refreshed quarterly from EIA-861 reports.
PVWatts is the canonical sizing tool. Our solar calculators link to NREL for zip-code-specific irradiance values. Numbers reproduced verbatim.
Database of State Incentives for Renewables & Efficiency. Heat pump rebates, EV credits, solar exemptions — refreshed monthly.
Northeast Energy Efficiency Partnerships maintains the cold-climate certified heat pump list. Required for state HEEHRA, NY Clean Heat and Mass Save rebate claims.
20 pillars published. These are the six most-read this month. Each updated every 90 days so utility prices and IRA program statuses stay current.
26 tactics that actually move the needle, ranked by dollar impact. Every number sourced from EIA and utility audits.
Real $/W after NEM 3.0. County-by-county payback. The 4 cities where solar still pays back in under 8 years.
4 climate zones. Real ROI tables. When gas still wins, when state HEEHRA rebates flip the math.
15 EVs. Level 1 vs Level 2 vs DC fast. Real per-mile in 10 popular states. Tesla Supercharger vs home overnight.
50-state ranking. Federal credit + state incentive + net-metering policy combined. Where solar pays back in <6 years.
6-step sequence that minimizes upfront capital. Why heat pump water heater comes before solar in most homes.
Typical power draw and monthly cost at the US average rate ($0.17/kWh, 3 hours/day usage where applicable).
The five questions that arrive by email every week. If yours isn't here, write to us — we reply within 48 hours.
No for the big federal ones. The One Big Beautiful Bill Act (OBBBA), signed July 2025, eliminated the 30% residential solar tax credit (Section 25D) and the $2,000 heat pump credit (Section 25C) for any system installed after that date. State-level rebates (HEEHRA where deployed) and utility incentives are now the main path to offset costs — DOE's tracker shows 19 states actively deploying HEEHRA funds as of May 2026. Check DSIRE for your zip code monthly, the program list changes. Our state-by-state replacements guide covers what survived and what now offsets the federal gap.
Our calculator uses your local kWh rate (EIA state averages as default, or your bill rate as override) multiplied by appliance wattage and usage hours. Accuracy is ±5% for steady-state appliances (fridge, heater, AC running). Less accurate for variable-load devices (gaming PCs, induction cooktops) where actual draw fluctuates. For TOU plans we estimate weighted average — exact dollar calculation requires your specific utility's hourly schedule which we link to in the TOU EV guide.
Because installer pricing and equipment availability vary wildly by zip code, and our recommendations would be obsolete within months. We tell you what to ask for (HSPF ≥ 9 for cold climates, NEM 3.0 awareness in California, ccASHP certification if claiming surviving state heat-pump rebates like HEEHRA, NY Clean Heat or Mass Save) and where to verify (NEEP product list, NREL PVWatts, DSIRE). The actual purchase decision belongs to a local quote you control.
State average electricity rates: refreshed quarterly from EIA. Tax credit and rebate tables: refreshed monthly from DSIRE. Heat pump model certifications: checked monthly against the NEEP ccASHP list. Each pillar guide carries a "Last updated" date in the byline so you can verify currency.
Fuel mix + generation infrastructure + transmission costs + state policy. As of EIA 2026 data: cheapest states (Idaho, Washington, Utah) average $0.10–0.12/kWh thanks to abundant hydro and no carbon adders. Mid-pack (Texas, Georgia, Florida): $0.12–0.16. Expensive (California, Massachusetts, New York): $0.22–0.32. Most expensive (Hawaii): $0.42 — almost entirely from imported diesel for island generators. Your zip code determines way more of your bill than your appliances do.
US, UK, Ireland, Canada, Australia. Pick your country — we load a realistic 2026 rate automatically and convert every calculation.
No signups. No email gates. Calculator works offline once loaded.
Funded by unobtrusive ads (Google AdSense, pending approval). Any affiliate link, when added, will be clearly labelled. No paywalls, no pressure on our recommendations.
We refresh country-average tariffs every quarter using EIA (US), Ofgem (UK), Eurostat and CRU (Ireland) public data.
Mobile-first. The whole site loads in under 1 second on a 4G connection.
Every number tied to EIA, NREL, DSIRE, Ofgem or a manufacturer spec sheet. If we can't source it, we don't print it.
Plug your numbers into the calculator and see exactly where the money goes. 60 seconds. No email gate.
Open calculator