A 380 watt solar panel represents a powerful mid-range option for both residential and commercial solar installations, offering an excellent balance of efficiency, cost-effectiveness, and space optimization. As solar technology continues advancing in 2025, these panels have become increasingly popular among property owners seeking to maximize energy production without the premium cost of higher-wattage alternatives.
380W solar panels typically feature 144 half-cut monocrystalline cells with efficiency ratings between 20-25%, making them ideal for installations where roof space is at a premium but energy needs are substantial. Whether you’re considering solar for your home, RV, or commercial property, understanding the specifications and capabilities of 380 watt solar panels is crucial for making an informed decision.
What Are 380 Watt Solar Panels?
A 380 watt solar panel is a photovoltaic module capable of producing 380 watts of power under Standard Test Conditions (STC). These panels sit in the mid-to-high range of residential solar panel wattages, offering more power than traditional 300-365W panels while remaining more affordable than premium 400W+ options.
Key characteristics of 380W solar panels include:
- Cell Configuration: Typically 144 half-cut monocrystalline cells
- Efficiency Range: 20-25% module efficiency
- Physical Size: Approximately 78″ x 39″ x 1.4″
- Weight: 50-63 pounds depending on manufacturer
- Applications: Residential rooftops, commercial installations, RV systems
Who Should Consider 380W Panels?
380 watt solar panels are ideal for:
- Homeowners with moderate roof space seeking high energy output
- Commercial properties requiring efficient space utilization
- RV enthusiasts needing reliable off-grid power
- Property owners in areas with limited sun hours
- Installations where reducing the total number of panels is beneficial
Technical Specifications Deep Dive
Understanding the technical specifications of 380W solar panels is essential for proper system design and performance expectations. Here’s a comprehensive breakdown of the key electrical and physical characteristics:
Power Output and Efficiency Ratings
Most 380 watt solar panels achieve efficiency ratings between 20-25%, with premium models reaching the higher end of this range. This efficiency represents how effectively the panel converts sunlight into electricity, with higher percentages indicating better performance per square foot. Maintaining optimal solar panel efficiency requires regular maintenance and proper care throughout the system’s lifespan.
Typical efficiency breakdown:
- Standard models: 20-21%
- Premium models: 22-25%
- Advanced technology (HJT, TOPCon): 23-25%+
Voltage Specifications
380W panels typically operate within these voltage ranges:
- Open Circuit Voltage (Voc): 47-49V
- Maximum Power Voltage (Vmp): 39-41V
- System Voltage Rating: 1000V DC (IEC/UL)
These voltage specifications are crucial for inverter compatibility and string sizing calculations.
Current Specifications
Current ratings for 380W panels generally fall within:
- Short Circuit Current (Isc): 10.0-10.2A
- Maximum Power Current (Imp): 9.4-9.6A
- Fuse Rating: 20A
Physical Dimensions and Weight
Standard 380W solar panels share similar physical characteristics:
- Length: 77-79 inches (1950-2000mm)
- Width: 39-41 inches (1000-1040mm)
- Thickness: 1.4-1.6 inches (35-40mm)
- Weight: 49-63 pounds (22-29kg)
- Area: Approximately 21-22 square feet
Temperature Coefficients
Temperature coefficients indicate how panel performance changes with temperature variations:
- Power Temperature Coefficient: -0.35% to -0.26% per °C
- Voltage Temperature Coefficient: -0.24% to -0.28% per °C
- Current Temperature Coefficient: +0.04% to +0.06% per °C
Lower (more negative) power temperature coefficients indicate better performance in hot conditions.
380W vs Other Wattages: Comprehensive Comparison
When selecting solar panels, comparing different wattage options helps determine the best fit for your specific needs and constraints.
Detailed Comparison Table
| Specification | 365W Panel | 380W Panel | 400W Panel |
|---|---|---|---|
| Typical Efficiency | 18-20% | 20-25% | 20-25% |
| Dimensions (approx.) | 77″ x 39″ | 78″ x 39″ | 79″ x 39″ |
| Price Range | $190-$230 | $210-$260 | $240-$290 |
| Cost per Watt | $0.52-$0.63 | $0.55-$0.68 | $0.60-$0.73 |
| Panels for 6kW System | 17 panels | 16 panels | 15 panels |
Cost Per Watt Analysis
While 380W panels typically cost more per watt than lower-wattage options, they often provide better overall value when considering:
- Reduced installation labor: Fewer panels mean lower installation costs
- Lower racking costs: Fewer mounting points and hardware requirements
- Simplified electrical work: Fewer connections and combiner requirements
- Permit savings: Some jurisdictions charge per panel for permits
Space Efficiency Considerations
380W panels excel in space-constrained installations:
- Power density: 17-18 watts per square foot
- Roof utilization: Better use of available space compared to lower-wattage panels
- Aesthetic appeal: Fewer panels create a cleaner, more uniform appearance
Top 380 Watt Solar Panel Brands and Models
Several manufacturers produce high-quality 380W solar panels, each with unique features and performance characteristics. Here are the leading options available in 2025:
Q CELLS Q.PEAK DUO L-G5.3 380
Q CELLS’ Q.PEAK DUO L-G5.3 380 represents one of the most popular 380W panels on the market, featuring advanced Q.ANTUM technology.
Key specifications:
- Efficiency: 18.9%
- Dimensions: 79.33″ x 39.37″ x 1.38″
- Weight: 41.2 lbs
- Voltage (Voc): 47.95V
- Current (Isc): 10.05A
- Warranty: 12-year product, 25-year performance
Notable features:
- 144 Q.ANTUM half-cut monocrystalline cells
- 6-busbar design for improved current collection
- Anti-LID and Anti-PID technology
- Excellent low-light performance
- 1500V system compatibility
Trina Solar TSM-380-DE14A
Trina Solar’s TallMax Plus series offers reliable performance with proven durability and competitive pricing.
Key specifications:
- Efficiency: Approximately 19.5%
- Dimensions: 77.17″ x 39.06″ x 1.57″
- Weight: 49.6 lbs
- Voltage (Voc): 48.8V
- Current (Isc): 9.94A
- Warranty: 10-year workmanship, 25-year linear performance
Notable features:
- 72-cell monocrystalline design
- Advanced surface texturing
- Back surface field technology
- PID resistant construction
- Certified for extreme weather conditions
Panasonic Module 380-Watt
Panasonic’s 380W offering combines premium efficiency with exceptional build quality, though at a higher price point.
Key specifications:
- Efficiency: 21.7%
- Dimensions: 67.8″ x 40.0″ x 1.18″
- Weight: Approximately 40 lbs
- Temperature coefficient: -0.26%/°C
- Warranty: 25-year product and performance
Notable features:
- HIT (Heterojunction) cell technology
- Superior temperature performance
- Excellent low-light response
- Premium build quality
- Made in Malaysia with Japanese technology
JinkoSolar and Other Leading Brands
Additional manufacturers offering competitive 380W panels include:
- JinkoSolar: Tiger Neo series with advanced cell technology
- Canadian Solar: HiKu7 series with reliable performance
- LONGi Solar: Hi-MO X6 series with high efficiency
- JA Solar: DeepBlue 4.0 Pro series
- Hanwha Q CELLS: Various Q.PEAK models
Applications and Use Cases
380 watt solar panels serve diverse applications across residential, commercial, and mobile installations. Understanding these use cases helps determine if 380W panels are right for your specific needs.
Residential Rooftop Installations
For residential applications, 380W panels offer several advantages:
- Space optimization: Ideal for homes with limited roof space
- Aesthetic appeal: Fewer panels create a cleaner appearance
- Cost efficiency: Reduced installation complexity and labor
- Future expansion: Easier to add panels later if needed
Typical residential applications:
- Single-family homes with 1,500-3,000 sq ft roofs
- Properties with partial shading issues
- Homes in HOA communities with aesthetic restrictions
- New construction with integrated solar design
Commercial and Utility-Scale Projects
Commercial installations benefit from 380W panels through:
- Reduced labor costs: Fewer panels mean faster installation
- Lower O&M costs: Fewer connections and potential failure points
- Improved ROI: Better balance of cost and performance
- Simplified logistics: Easier transportation and handling
RV and Mobile Applications
For recreational vehicles and mobile applications, 380W panels provide:
- High power density: Maximum power from limited roof space
- Durability: Built to withstand vibration and weather
- Flexibility: Compatible with various mounting systems
- Off-grid capability: Sufficient power for extended boondocking
Off-Grid Cabin and Remote Power Systems
Remote installations benefit from 380W panels through:
- Reduced system complexity: Fewer panels simplify wiring
- Lower maintenance: Fewer components to monitor and maintain
- Cost-effective shipping: Fewer panels reduce transportation costs
- Reliable performance: Proven technology for critical applications
System Design Considerations
Proper system design is crucial for maximizing the performance and value of 380W solar panels. Several key factors must be considered during the planning phase.
How Many 380W Panels for Different Home Sizes
The number of 380W panels needed depends on energy consumption, location, and available roof space:
- Small home (1,000-1,500 sq ft): 10-14 panels (3.8-5.3kW system)
- Medium home (1,500-2,500 sq ft): 14-20 panels (5.3-7.6kW system)
- Large home (2,500+ sq ft): 20-30 panels (7.6-11.4kW system)
These estimates assume average energy consumption of 30-40 kWh per day and good solar exposure.
String Sizing and Inverter Compatibility
Proper string sizing ensures optimal inverter performance:
- String inverters: Typically 8-12 panels per string
- Power optimizers: One optimizer per panel
- Microinverters: One microinverter per panel
Key considerations:
- Inverter input voltage range
- Maximum string current rating
- Temperature effects on voltage
- System expansion capabilities
Roof Space Requirements and Layout Optimization
Efficient layout design maximizes energy production:
- Minimum spacing: 6-12 inches between panels and roof edges
- Row spacing: Calculated to minimize shading
- Orientation: South-facing preferred in Northern Hemisphere
- Tilt angle: Optimized for latitude and seasonal production goals
Shading Impact and Mitigation Strategies
Shading can significantly impact system performance:
- Bypass diodes: Minimize impact of cell-level shading
- Power optimizers: Provide module-level maximum power point tracking
- Microinverters: Eliminate string-level shading losses
- Strategic placement: Avoid known shading sources
Installation Requirements
Successful installation of 380W solar panels requires careful attention to mounting, electrical, and safety requirements.
Mounting System Compatibility
380W panels are compatible with most standard mounting systems:
- Roof-mounted systems: Rails, clamps, and flashing
- Ground-mounted systems: Fixed-tilt or tracking structures
- Ballasted systems: For flat roofs without penetrations
- Pole-mounted systems: For optimal orientation and accessibility
Electrical Requirements and Safety
Proper electrical installation ensures safety and performance:
- DC disconnects: Required for system isolation
- Grounding: Equipment and system grounding per NEC
- Rapid shutdown: NEC 690.12 compliance for rooftop systems
- Arc fault protection: Required for most residential installations
Professional vs DIY Installation
While DIY installation is possible, professional solar panel installation offers several advantages:
Professional installation benefits:
- Warranty protection
- Permit and inspection handling
- Code compliance assurance
- Insurance coverage
- System optimization
DIY considerations:
- Electrical knowledge required
- Permit applications needed
- Safety equipment necessary
- Limited warranty coverage
Performance and Efficiency Analysis
Understanding real-world performance helps set realistic expectations for 380W solar panel systems.
Real-World Performance vs STC Ratings
Standard Test Conditions (STC) represent ideal laboratory conditions that rarely occur in real-world installations:
- STC conditions: 1000 W/m² irradiance, 25°C cell temperature, 1.5 air mass
- Real-world factors: Variable irradiance, higher temperatures, soiling, shading
- Performance ratio: Typically 75-85% of STC rating
A 380W panel typically produces 285-325W under real-world conditions.
Seasonal Performance Variations
Solar panel performance varies significantly by season:
- Summer: Higher irradiance but reduced efficiency due to heat
- Winter: Lower irradiance but improved efficiency in cold temperatures
- Spring/Fall: Often optimal combination of irradiance and temperature
Degradation Rates and Long-Term Output
Modern 380W panels experience minimal degradation over time:
- First year: 2-3% initial degradation
- Subsequent years: 0.4-0.5% annual degradation
- 25-year output: Typically 85-90% of original rating
Pricing and Cost Analysis
Understanding the complete cost structure helps evaluate the value proposition of 380W solar panels.
Current Market Prices
As of 2025, 380W solar panel prices range from $210-$260 per panel, depending on brand, technology, and purchase volume:
- Budget options: $210-$230 per panel
- Mid-range options: $230-$250 per panel
- Premium options: $250-$260+ per panel
Cost Per Watt Breakdown
Cost per watt provides a standardized comparison metric:
- Budget panels: $0.55-$0.61 per watt
- Mid-range panels: $0.61-$0.66 per watt
- Premium panels: $0.66-$0.68+ per watt
Total System Cost Implications
Panel cost represents only 25-35% of total system cost. Other components include:
- Inverters: $0.15-$0.25 per watt
- Mounting systems: $0.10-$0.20 per watt
- Electrical components: $0.05-$0.15 per watt
- Installation labor: $0.50-$1.00 per watt
- Permits and fees: $0.10-$0.30 per watt
ROI and Payback Period Calculations
Return on investment varies by location, utility rates, and incentives. To make solar more accessible, many homeowners explore solar financing options that can reduce upfront costs and provide immediate savings:
- Typical payback period: 6-10 years
- 25-year savings: $15,000-$40,000
- IRR (Internal Rate of Return): 8-15%
Buying Guide and Selection Criteria
Selecting the right 380W solar panels requires evaluating multiple factors beyond just price and efficiency.
Key Evaluation Factors
When comparing 380W solar panels, consider these critical factors:
- Efficiency rating: Higher efficiency means more power from limited space
- Temperature coefficient: Better performance in hot climates
- Build quality: Frame construction, cell technology, and materials
- Warranty terms: Product and performance warranty duration
- Manufacturer reputation: Financial stability and customer support
- Certifications: UL, IEC, and other safety/performance standards
Warranty Considerations
Solar panel warranties typically include two components:
Product warranty (12-25 years):
- Covers manufacturing defects
- Frame, glass, and junction box issues
- Premature failure protection
Performance warranty (25 years):
- Guarantees minimum power output
- Typically 90% at 10 years, 80% at 25 years
- Linear vs. stepped degradation schedules
Certifications and Quality Standards
Look for panels with these important certifications:
- UL 1703: Safety standard for flat-plate photovoltaic modules
- IEC 61215: Design qualification and type approval
- IEC 61730: Safety qualification requirements
- UL 2703: Mounting systems and grounding equipment
Where to Buy: Online vs Local Dealers
Online retailers offer:
- Competitive pricing
- Wide selection
- Detailed specifications
- Customer reviews
Local dealers provide:
- Technical support
- Installation services
- Local warranty support
- Relationship building
Maintenance and Troubleshooting
Proper maintenance ensures optimal performance and longevity of 380W solar panel systems.
Routine Maintenance Requirements
Solar panels require minimal maintenance, but regular attention maximizes performance. Professional solar panel cleaning services can help maintain optimal efficiency:
- Visual inspection: Monthly check for damage or debris
- Cleaning: Remove dirt, leaves, and snow as needed
- Performance monitoring: Track energy production trends
- Electrical connections: Annual inspection by qualified technician
Performance Monitoring and Optimization
Modern monitoring systems provide detailed performance data:
- Production monitoring: Track daily, monthly, and annual output
- Performance ratios: Compare actual vs. expected production
- Fault detection: Identify underperforming panels or strings
- Weather correlation: Understand environmental impacts
Common Issues and Solutions
Understanding common problems helps maintain system performance:
- Soiling: Regular cleaning improves output by 5-15%
- Shading: Trim vegetation or consider power optimizers
- Inverter faults: Monitor error codes and reset as needed
- Connection issues: Check for loose or corroded connections
Future Outlook and Technology Trends
The solar industry continues evolving rapidly, with several trends affecting 380W panel technology and market positioning.
Emerging Technologies
Several technological advances are improving 380W panel performance:
- Heterojunction (HJT) cells: Higher efficiency and better temperature performance
- TOPCon technology: Improved electron collection and reduced recombination
- Bifacial designs: Generate power from both sides of the panel
- Half-cut cells: Reduced resistive losses and improved shade tolerance
Market Trends and Price Projections
Industry trends suggest continued evolution in the 380W segment:
- Efficiency improvements: Expect 22-24% efficiency by 2027
- Cost reductions: Continued manufacturing scale and technology improvements
- Larger formats: Trend toward larger panels with higher wattages
- Specialized applications: Panels optimized for specific use cases
Integration with Energy Storage
Battery storage integration is becoming increasingly common:
- DC-coupled systems: Direct connection for improved efficiency
- Smart inverters: Grid support and advanced energy management
- Time-of-use optimization: Store energy for peak rate periods
- Backup power: Provide resilience during outages
Conclusion
380 watt solar panels represent an excellent balance of performance, cost, and versatility for a wide range of applications in 2025. With efficiency ratings reaching 20-25% and competitive pricing between $210-$260 per panel, they offer compelling value for both residential and commercial installations.
Key advantages of 380W panels include space efficiency, reduced installation complexity, and strong performance across various conditions. Leading manufacturers like Q CELLS, Trina Solar, and Panasonic offer reliable options with comprehensive warranties and proven track records.
When selecting 380W solar panels, prioritize efficiency, temperature coefficients, warranty terms, and manufacturer reputation over price alone. Proper system design, professional installation, and regular maintenance ensure optimal performance and maximum return on investment.
As solar technology continues advancing, 380W panels will likely see further efficiency improvements and cost reductions, making them an even more attractive option for property owners seeking clean, renewable energy solutions. Whether for residential rooftops, commercial installations, or mobile applications, 380 watt solar panels provide a proven path to energy independence and long-term savings.