Oklahoma Solar Production & Irradiance Data
4.7 peak sun hours/day · 8,244 kWh/year from a 6kW system · above national average
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Oklahoma receives an average of 4.7 peak sun hours per day, which translates to a Global Horizontal Irradiance (GHI) of 4.7 kWh/m²/day. When solar panels are tilted at the optimal angle for Oklahoma's latitude, irradiance increases to 5.42 kWh/m²/day — a 15% boost over flat-mounted panels.
This puts Oklahoma above the national average of 4.29 peak sun hours per day. Oklahoma's superior solar resource means your panels will produce significantly more electricity than the same system installed in an average US state. These figures are derived from NREL solar resource maps and PVWatts reference calculations.
Expected Annual Output by System Size
| System Size | Annual Output | Avg Monthly | Annual Savings | 25-Year Savings |
|---|---|---|---|---|
| 4 kW (12-16 panels) | 5,496 kWh | 458 kWh | $721/yr | $18,025 |
| 6 kW (18-24 panels) | 8,244 kWh | 687 kWh | $1,082/yr | $27,050 |
| 8 kW (24-32 panels) | 10,992 kWh | 916 kWh | $1,442/yr | $36,050 |
| 10 kW (30-40 panels) | 13,740 kWh | 1,145 kWh | $1,803/yr | $45,075 |
Based on 5.42 kWh/m²/day tilt irradiance, 14% system losses, and 13.12¢/kWh electricity rate. Actual output varies by installation specifics.
Month-by-Month Solar Production in Oklahoma
Estimated monthly output for a 6kW system:
Solar production in Oklahoma peaks in June when a 6kW system generates approximately 948 kWh — about 11.5% of annual production in a single month. The lowest production month is December at approximately 330 kWh (4% of annual output). This 2.9:1 seasonal ratio is relatively moderate, meaning your solar production stays fairly consistent throughout the year.
How Oklahoma Compares Nationally
Tips for Maximizing Solar Production in Oklahoma
Oklahoma's 4.7 peak sun hours per day provides solid solar production. Proper panel orientation is important — aim for south-facing at Oklahoma's latitude tilt angle for optimal year-round performance.
Consider adding battery storage to your Oklahoma 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 for backup power during outages.
Solar Irradiance Technical Data
Global Horizontal Irradiance (GHI): 4.7 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: 5.42 kWh/m²/day. When panels are tilted at the optimal angle for Oklahoma's latitude, they receive 15% 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.
Oklahoma Solar Production FAQ
How many peak sun hours does Oklahoma get?▼
Oklahoma averages 4.7 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 is derived from NREL solar resource maps and PVWatts reference calculations.
How much electricity will a 6kW solar system produce in Oklahoma?▼
A 6kW solar system in Oklahoma produces approximately 8,244 kWh per year, or about 687 kWh per month on average. Production peaks in June (approximately 948 kWh) and is lowest in December (approximately 330 kWh). At Oklahoma's average rate of 13.12¢/kWh, this saves you about $1,082/year.
What is the best month for solar production in Oklahoma?▼
June is typically the best month for solar production in Oklahoma, with a 6kW system producing approximately 948 kWh. The long daylight hours and high sun angle combine for maximum energy generation. The worst month is December, producing about 330 kWh — roughly 35% of the best month's output.
How does Oklahoma's solar potential compare to other states?▼
Oklahoma's average of 4.7 peak sun hours per day puts it above the national average of 4.29 hours. A 6kW system in Oklahoma produces 8,244 kWh/year, compared to the national average of 7,562 kWh/year — that's +682 kWh/year (+9%). Even at Oklahoma's 13.12¢/kWh rate, solar delivers solid returns.
What affects solar panel output in Oklahoma?▼
Key factors affecting solar output in Oklahoma include: roof orientation (south-facing is ideal), tilt angle (latitude tilt of 37° is optimal), shading from trees or buildings, panel efficiency rating, and local weather patterns. Oklahoma's GHI (Global Horizontal Irradiance) is 4.7 kWh/m²/day, but panels tilted at the optimal angle receive 5.42 kWh/m²/day — a 15% improvement over flat-mounted panels.
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Oklahoma Solar Data
- ☀️ Peak Sun Hours: 4.7 hrs/day
- 📊 GHI: 4.7 kWh/m²/day
- 📐 Tilt Irradiance: 5.42 kWh/m²/day
- ⚡ 6kW Output: 8,244 kWh/yr
- 📈 Best Month: June
- 📉 Worst Month: December
- 💡 Electricity Rate: 13.12¢/kWh
- 💰 Annual Savings (6kW): $1,082
- 📋 Data: NREL Reference Data