Alabama Solar Production & Irradiance Data
4.65 peak sun hours/day · 7,776 kWh/year from a 6kW system · above national average
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Alabama receives an average of 4.65 peak sun hours per day, which translates to a Global Horizontal Irradiance (GHI) of 4.65 kWh/m²/day. When solar panels are tilted at the optimal angle for Alabama's latitude, irradiance increases to 5.23 kWh/m²/day — a 12% boost over flat-mounted panels.
This puts Alabama above the national average of 4.29 peak sun hours per day. Alabama's superior solar resource means your panels will produce significantly more electricity than the same system installed in an average US state. These figures come directly from the NREL Solar Resource API using TMY (Typical Meteorological Year) data averaged from 1998-2020.
Expected Annual Output by System Size
| System Size | Annual Output | Avg Monthly | Annual Savings | 25-Year Savings |
|---|---|---|---|---|
| 4 kW (12-16 panels) | 5,184 kWh | 432 kWh | $835/yr | $20,875 |
| 6 kW (18-24 panels) | 7,776 kWh | 648 kWh | $1,252/yr | $31,300 |
| 8 kW (24-32 panels) | 10,368 kWh | 864 kWh | $1,669/yr | $41,725 |
| 10 kW (30-40 panels) | 12,960 kWh | 1,080 kWh | $2,087/yr | $52,175 |
Based on 5.23 kWh/m²/day tilt irradiance, 14% system losses, and 16.1¢/kWh electricity rate. Actual output varies by installation specifics.
Month-by-Month Solar Production in Alabama
Estimated monthly output for a 6kW system:
Solar production in Alabama peaks in June when a 6kW system generates approximately 816 kWh — about 10.5% of annual production in a single month. The lowest production month is December at approximately 389 kWh (5% of annual output). This 2.1:1 seasonal ratio is relatively moderate, meaning your solar production stays fairly consistent throughout the year.
How Alabama Compares Nationally
Tips for Maximizing Solar Production in Alabama
Alabama's 4.65 peak sun hours per day provides solid solar production. Proper panel orientation is important — aim for south-facing at Alabama's latitude tilt angle for optimal year-round performance.
Heat management is worth considering in Alabama's warm climate. While you get abundant sunshine, panel efficiency drops slightly in extreme heat (above 77°F/25°C). Ensure adequate airflow beneath panels by maintaining 4-6 inches of clearance above the roof surface. Microinverters can also help mitigate heat-related losses.
Consider adding battery storage to your Alabama solar system. A 10-13 kWh home battery lets you store excess daytime production for evening use, maximizing your self-consumption and reducing grid dependence. This is especially valuable in Alabama where net metering credits are limited.
Solar Irradiance Technical Data
Global Horizontal Irradiance (GHI): 4.65 kWh/m²/day. GHI measures the total solar radiation received on a horizontal surface, including direct sunlight and diffuse radiation from clouds and atmospheric scattering. This is the baseline measurement for solar resource assessment.
Tilt Irradiance: 5.23 kWh/m²/day. When panels are tilted at the optimal angle for Alabama's latitude, they receive 12% more solar radiation than flat-mounted panels. This tilt optimization is one of the easiest ways to boost your system's output.
System Output Estimation: The annual production figures use the NREL PVWatts methodology: Tilt Irradiance × 365 days × System Size × (1 − System Losses) × Inverter Efficiency. We use 14% system losses (wiring, soiling, degradation, mismatch) and 96% inverter efficiency, matching PVWatts defaults.
Alabama Solar Production FAQ
How many peak sun hours does Alabama get?▼
Alabama averages 4.65 peak sun hours per day, which is above the national average of 4.29 hours. Peak sun hours represent hours of full-intensity sunlight equivalent — a key factor in estimating solar panel output. This data comes directly from the NREL Solar Resource API.
How much electricity will a 6kW solar system produce in Alabama?▼
A 6kW solar system in Alabama produces approximately 7,776 kWh per year, or about 648 kWh per month on average. Production peaks in June (approximately 816 kWh) and is lowest in December (approximately 389 kWh). At Alabama's average rate of 16.1¢/kWh, this saves you about $1,252/year.
What is the best month for solar production in Alabama?▼
June is typically the best month for solar production in Alabama, with a 6kW system producing approximately 816 kWh. The long daylight hours and high sun angle combine for maximum energy generation. The worst month is December, producing about 389 kWh — roughly 48% of the best month's output.
How does Alabama's solar potential compare to other states?▼
Alabama's average of 4.65 peak sun hours per day puts it above the national average of 4.29 hours. A 6kW system in Alabama produces 7,776 kWh/year, compared to the national average of 7,562 kWh/year — that's +214 kWh/year (+3%). Combined with Alabama's above-average electricity rate of 16.1¢/kWh, solar is especially financially attractive here.
What affects solar panel output in Alabama?▼
Key factors affecting solar output in Alabama include: roof orientation (south-facing is ideal), tilt angle (latitude tilt of 36° is optimal), shading from trees or buildings, panel efficiency rating, and local weather patterns. Alabama's GHI (Global Horizontal Irradiance) is 4.65 kWh/m²/day, but panels tilted at the optimal angle receive 5.23 kWh/m²/day — a 12% improvement over flat-mounted panels.
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Alabama Solar Data
- ☀️ Peak Sun Hours: 4.65 hrs/day
- 📊 GHI: 4.65 kWh/m²/day
- 📐 Tilt Irradiance: 5.23 kWh/m²/day
- ⚡ 6kW Output: 7,776 kWh/yr
- 📈 Best Month: June
- 📉 Worst Month: December
- 💡 Electricity Rate: 16.1¢/kWh
- 💰 Annual Savings (6kW): $1,252
- ✅ Data: NREL API Verified