Compare
Every comparison includes an interactive calculator. Enter your local rates and usage — get results specific to your home.
Solar 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.