Solar vs Wind Energy Calculator

Compare solar panels and wind turbines for your home side-by-side. See annual production, 20-year costs, noise levels, and space needs — get a clear Solar, Wind, or Hybrid recommendation.

Location & energy needs

Location / wind resource?

Monthly energy need?

kWh/mo

Budget?

Wind turbine selection

Wind turbine size?

Solar vs Wind comparison

RECOMMENDATION: Solar

Solar is more cost-effective at this location. Wind speeds are too low for a competitive turbine installation.

Metric	☀️ Solar	💨 Wind
System size	8.3 kW	5.0 kW @ 100 ft hub
Annual kWh production	14,400	10,891
Installation cost	$23,207	$35,000
20-year total cost	$25,694	$47,000
Cost per kWh (20 yr)	8.9¢	21.6¢
Maintenance $/year	$124	$600
Installation complexity	●●○○○	●●●●○
Noise level	Silent (0 dB)	48 dB
Space required	829 sq ft	1 acres clearance
Reliability score	4.5/5	3/5
Permits needed	Building permit, electrical permit	Building permit, electrical permit, zoning/height variance, FAA notification (if >200 ft)

Location avg wind speed12.5 mph

Turbine capacity factor24.9%

Hybrid system annual kWh25,291 kWh

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How to Use This Calculator

Select your location

Your location determines two critical inputs: average wind speed (which drives turbine output) and peak sun hours (which drives solar output). Wind power scales with the cube of wind speed — doubling wind speed produces 8× more power. A location with 12 mph average wind produces 3.4× more turbine output than a location with 8 mph average wind. This non-linear relationship explains why small differences in wind speed have huge impacts on wind energy economics.

Enter your monthly energy need

Check your utility bill for monthly kWh consumption. The calculator sizes a solar system to cover your full annual need, then compares that against the selected wind turbine's expected output. Most US households use 700–1,200 kWh/month.

Select a wind turbine size

Residential wind turbines range from 400W micro-turbines (for supplemental power at remote sites) to 10kW commercial-scale units. Turbine size determines hub height requirements, noise level, permitting complexity, and installation cost. A 5kW turbine at 100 ft hub height is the practical maximum for most residential zoning environments.

The Formula

Solar annual kWh = System kW × PSH × 0.85 × 365 Solar system kW = Annual need ÷ (PSH × 0.85 × 365) Solar install cost = System kW × $2,800/kW Wind capacity factor = Base cap. factor × (Local wind mph ÷ 12 mph)³ Wind annual kWh = Turbine kW × Adjusted cap. factor × 8,760 hours Wind install cost = Turbine-specific cost (from database) 20-yr total cost = Install cost + (Maintenance $/yr × 20) Cost per kWh = 20-yr total cost ÷ (Annual kWh × 20)

The cubic wind speed scaling is the fundamental physics of wind energy: power = ½ × air density × swept area × wind velocity³. This means wind energy is extremely sensitive to site wind speed — a turbine at a 12 mph site produces 73% more energy than at a 10 mph site. This is why wind site assessment (measured over 1+ year, not estimated averages) is critical before committing to a wind turbine investment.

Solar uses a $2,800/kW installed cost estimate and a 0.85 system efficiency factor for wiring and inverter losses. Wind costs are based on 2024 residential turbine pricing from major manufacturers.

Example

Oklahoma plains homestead — 1,200 kWh/month

A rural homeowner in Oklahoma with strong wind resource (12.5 mph avg) and good solar (5.6 PSH) needs 1,200 kWh/month. Comparing a 14.4 kW solar system vs a 5kW wind turbine.

Annual energy need14,400 kWh

Location avg wind speed12.5 mph

Peak sun hours5.6 hrs/day

Solar System

System size needed14,400 ÷ (5.6 × 0.85 × 365) = 8.3 kW

Installation cost8.3 kW × $2,800 = $23,200

Annual kWh~14,400 kWh

20-year cost$23,200 + $2,490 = $25,690

5kW Wind Turbine

Base capacity factor22%

Wind speed adjustment(12.5/12)³ = 1.13×

Effective capacity factor24.9%

Annual kWh5 × 24.9% × 8,760 = 10,900 kWh

Installation cost$35,000

20-year cost$35,000 + $12,000 = $47,000

Solar wins on cost-per-kWh ($0.089 vs $0.216) and covers full energy needs. However, the hybrid system producing 25,300 kWh/year provides energy security with complementary seasonal profiles — wind produces more in fall/winter when solar is weaker.

FAQ

Is solar or wind better for homes? ▼

For most US homeowners, solar is the clear winner: lower installed cost per kWh, simpler permitting, no moving parts, silent operation, works on any property with roof space, and qualifies for the federal 30% Investment Tax Credit. Wind makes sense when you have: (1) average wind speeds above 10–12 mph (not gusty — sustained average), (2) at least half an acre of open land, (3) no neighboring homes within 300–500 ft, (4) local zoning that allows turbine heights of 80–120 ft, and (5) the budget for $20,000–$65,000 installation. For rural properties with excellent wind resources, wind can achieve lower cost-per-kWh than solar, especially in states with low solar irradiance.

Can you combine solar and wind energy at home? ▼

Yes — hybrid solar + wind systems are increasingly popular for off-grid and energy-independent properties. They're complementary: solar peaks in summer during long days, while wind is often stronger in fall and winter. A properly sized hybrid system with battery storage can achieve near-100% energy independence in many climates. Both connect to the same inverter/charge controller in an off-grid setup. For grid-tied systems, each source connects independently through separate inverters. The main challenge is the significant upfront cost: $50,000–$100,000 for a comprehensive hybrid system, versus $20,000–$35,000 for solar alone.

How noisy are residential wind turbines? ▼

Modern residential wind turbines (1–10kW) produce 40–55 dB at 300 ft distance — roughly comparable to a quiet office (40 dB) to normal conversation (60 dB). At the base of the turbine, noise is higher (55–65 dB). Noise is continuous when the wind blows, which many neighbors find more disruptive than intermittent noise. Most jurisdictions have noise ordinances limiting residential turbines to 45–50 dB at the property line. Setback requirements (typically 1.5× hub height from property lines, or 300–500 ft minimum) are primarily noise-driven. Micro-turbines (400–1000W) are significantly quieter (35–45 dB) but produce minimal power.

Which is more reliable — solar or wind? ▼

Solar panels are significantly more reliable. With no moving parts, panels have a 25–30 year productive lifespan with minimal maintenance — occasional cleaning and inverter replacement every 10–15 years. Wind turbines have gearboxes, bearings, blades, and pitch/yaw systems that require regular maintenance: oil changes, blade inspections, bearing replacements. Small residential turbines (1–10kW) typically have 20-year lifespans with $200–$1,200/year in maintenance costs. Failures in components like gearboxes can cost $5,000–$15,000 to repair. Solar reliability score is ~4.5/5; wind is ~3/5 for residential-scale turbines.

Which is cheaper per kWh — solar or wind? ▼

At utility scale, wind is currently cheaper per kWh than solar in most regions ($25–$50/MWh LCOE for wind vs $30–$60/MWh for solar). But at residential scale, the math often flips: residential solar installs at $2,500–$3,500/kW, while residential wind turbines cost $6,000–$10,000/kW with higher maintenance. The federal 30% ITC applies to both, but solar benefits more due to lower base cost. In locations with average wind speeds above 12–14 mph and open land, residential wind can approach $0.10–$0.12/kWh — competitive with solar. In most suburban locations (6–10 mph average winds), residential wind is $0.20–$0.40/kWh — 2–4× more expensive than solar.