Compare
Every comparison includes an interactive calculator. Enter your local rates and usage — get results specific to your home.
Community Solar vs Rooftop Solar
Rooftop wins the 25-year math if you own a suitable roof. Community solar costs $0 upfront and works for renters. Compare both.
Solar & RenewablesSolar Lease vs Buy vs Loan
Each financing method has very different cost, ownership, and tax credit implications. Enter your system size to compare all three.
Solar & RenewablesSolar Panels vs Home Wind Turbine
Solar works for most homes. Wind is viable only in specific locations. Annual output and payback comparison.
Solar & RenewablesSolar Panels vs Battery Storage
Should you add a battery? The answer depends on your utility's net metering rate. Calculate your exact payback.
Solar & RenewablesMonocrystalline vs Polycrystalline Solar
Mono panels are more efficient; poly needs more roof space. Enter your energy use to see panel count and cost.
Solar & RenewablesOn-Grid vs Off-Grid Solar
On-grid reduces your bill. Off-grid replaces the utility entirely — at 2–4× the cost. Full comparison.
Solar & RenewablesSolar + Battery vs Generator
Generators are cheaper upfront. Solar + battery has near-zero operating costs. Compare 10-year total cost.
Transport & CarbonEV vs Gas Car: Break-Even Calculator
Find the exact year your EV breaks even vs. a comparable gas car at your driving habits and local rates.
Transport & CarbonEV vs Hybrid vs Gas: 5-Year Cost
EVs save the most on fuel. Hybrids need no behavior change. Compare total cost of ownership for all three.
Transport & CarbonElectric Bike vs Car Commute
An e-bike costs pennies per mile. Calculate your exact annual savings from replacing car trips.
Transport & CarbonDriving vs Flying: Carbon Calculator
Solo flying vs. driving is close. A full car beats flying on carbon. Compare by distance and passenger count.
Transport & CarbonPublic Transport vs Car
Transit can save urban commuters $3,000–9,000/year vs. car ownership. Calculate your specific savings.
Heating & CoolingHeat Pump vs Furnace vs Gas Boiler
HDD-based annual heating cost for your home size and climate. Heat pumps often win — see if they do for you.
Heating & CoolingCentral AC vs Window AC
Window units win for single rooms. Central AC wins for whole homes. Compare costs for your situation.
Heating & CoolingElectric Heat vs Gas Heat
The answer depends entirely on your local rates. Find the exact crossover point for your area.
Heating & CoolingSmart vs Programmable Thermostat
Both save 10–12% on HVAC. Smart thermostats do it automatically. Calculate payback for your energy spend.
Heating & CoolingPortable AC vs Window AC
Window units deliver 30–50% more cooling per watt. See the real cost difference for your room.
Heating & CoolingDemand Response vs Time-of-Use vs Solar+Battery
Three ways to save or earn from the grid, compared side by side — which combination makes sense for you.
Kitchen & AppliancesInduction vs Gas vs Electric Stove
Induction is 84% efficient; gas is 40%. Annual cooking cost comparison at your local rates.
Kitchen & AppliancesElectric vs Gas Dryer
Gas is cheaper per load in most areas — but infrastructure matters more. Full comparison including heat pump dryer.
Kitchen & AppliancesHeat Pump Dryer vs Electric
Heat pump dryers use 40–50% less electricity. Calculate your payback with the IRA tax credit applied.
Kitchen & AppliancesDishwasher vs Hand Washing
Modern dishwashers use less water and energy than hand washing. See the real annual cost difference.
Kitchen & AppliancesTankless vs Tank Water Heater
Tankless eliminates standby loss. But payback is often longer than expected. Calculate your specific scenario.
Kitchen & AppliancesElectric vs Gas Water Heater
Find the cheapest water heating option ranked by your local electricity and gas rates.
Kitchen & AppliancesHeat Pump Water Heater vs Electric
HPWHs use 60–70% less electricity. Even without the now-expired federal credit, payback is often 3–6 years. Calculate yours.
Lighting & EfficiencyLED vs CFL vs Incandescent
LEDs use 85% less energy than incandescent. Calculate your exact annual savings and payback in months.
Lighting & EfficiencySpray Foam vs Fiberglass Insulation
Spray foam seals air leaks; fiberglass is cheaper. Calculate installed cost and payback for your project.
Lighting & EfficiencyDouble vs Triple Pane Windows
Triple pane premium rarely pays back in most U.S. climates. Calculate for your heating degree days.
Lighting & EfficiencySolar Water Heater vs Electric
Solar thermal offsets 50–80% of water heating. Compare with HPWH for your sun hours and electricity rate.
Carbon & EnvironmentVegan vs Meat Diet Carbon
Beef emits 27 kg CO₂e/kg — 4× chicken. Calculate your annual food carbon footprint and reduction options.
Carbon & EnvironmentWind vs Solar Energy
Both are now among the cheapest electricity sources. Compare output, LCOE, and land use at any scale.
Carbon & EnvironmentPropane vs Natural Gas
Propane costs 50–130% more per BTU than gas. Calculate annual fuel cost and switching payback.
Heating & CoolingCeiling Fan vs AC
A ceiling fan costs $0.012/hr vs $0.41/hr for central AC. See when fans save money and how to use both together to cut bills by 15–30%.
Heating & CoolingCentral Heat vs Space Heater
Space heaters save money only with significant thermostat setback. Calculate your break-even based on fuel type and home size.
AppliancesGas Dryer vs Heat Pump Dryer
Gas dryers cost ~$0.23/load. Heat pump dryers cost ~$0.30/load but need no vent and qualify for the 30% IRA tax credit.
Carbon & EnvironmentTrain vs Plane Carbon Footprint
Rail emits 70–90% less CO2 per passenger-mile than flying. Calculate emissions for your route and see when trains are the greener choice.
Carbon & EnvironmentGas Car vs Hybrid Carbon Footprint
A hybrid cuts CO2 by 40–50% vs a gas car and saves $700–1,200/year in fuel. Calculate your annual savings by MPG and mileage.
Home EfficiencyWindow Insulation vs Window Replacement
Film costs $5–15/window with 1–3 year payback. Replacement costs $300–800 with 15–30 year payback. Compare which makes financial sense.
Water SavingsLow-Flow vs Standard Showerhead
Low-flow showerheads use 1.5-2.0 GPM vs 2.5 GPM standard. Calculate your water, energy, and dollar savings from switching.
Water SavingsRain Barrel vs Municipal Water
Rain barrels cost $70-150 upfront and save $20-60/year on outdoor watering. Calculate your payback period.
Water SavingsWell Water vs City Water
A well costs $5,000-$15,000 upfront but has no monthly bill. Calculate your actual breakeven point.
Solar & RenewableSolar Shingles vs Solar Panels
Solar shingles cost $21,000-35,000 more than traditional panels for the same output. Compare cost per watt and payback period.
AppliancesFront-Load vs Top-Load Washer
Front-load washers use 40% less water and 25-50% less energy. Calculate your annual savings by laundry frequency.
Heating & CoolingWhole-House Fan vs Central AC
A whole-house fan costs $0.03-0.08/hr vs $0.30-0.55/hr for central AC. Compare cost and climate suitability.