FAQ

WUXI TNSOLAR focuses on the R&D, manufacturing, and sales of photovoltaic modules. Its main products include:

• Monocrystalline PERC Modules:High-efficiency bifacial and monofacial modules, with power output ranging from 400W to 700W+.
• N-type TOPCon Modules:Next-generation high-efficiency cell technology featuring industry-leading conversion efficiency.
• BC Back-Contact Modules:Ultra-high efficiency with an aesthetic, grid-line-free design.
• Residential PV Systems: Complete solutions tailored for home rooftops.
• Commercial PV Systems: Large-scale projects for industrial/commercial rooftops and ground-mounted power stations.

All products are certified by international authorities and comply with IEC, TÜV, CE, UL, and other standards.

WUXI TNSOLAR PV modules are designed for a service life of 25-30 years. We provide:

• 12-year product warranty on materials and workmanship
• 25-year linear power output warranty

After 25 years, the modules are guaranteed to maintain over 80% of their initial power output. Please note that the actual service life may vary depending on installation environment and maintenance conditions.

Bifacial modules are photovoltaic modules capable of generating power from both direct sunlight on the front side and reflected light on the rear side.

Key Advantages：

• Increased Power Generation: Boosts energy yield by 5%-25%, depending on ground albedo (reflectivity).
• Superior Weak Light Performance: Better response in low-light conditions.
• Lower LCOE: Reduces the Levelized Cost of Energy.
• Ideal for High-Albedo Environments: Perfect for snowy, sandy, or light-colored ground surfaces.

Target Applications: Especially suitable for large-scale ground-mounted power stations and tracking systems.

N-type TOPCon (Tunnel Oxide Passivated Contact)is a next-generation high-efficiency cell technology. Compared to traditional P-type PERC, it offers the following advantages:

• Higher Conversion Efficiency: Mass production efficiency exceeds 25%.
• Lower Degradation: Reduced Light Induced Degradation (LID) and Potential Induced Degradation (PID).
• Better Temperature Coefficient: -0.30%/°C vs. -0.35%/°C.
• Superior Weak Light Response: Better performance in low-light conditions.
• Longer Service Life: Enhanced durability over time.

N-type technology represents the future trend of the photovoltaic industry, delivering higher energy yield and return on investment (ROI).

WUXI TNSOLAR places high importance on technological innovation, investing over 5% of its annual sales revenue into R&D.

R&D Strength:

• Expert Team: A dedicated team of 50+ R&D professionals.
• IP Portfolio: 1,000+ patents filed to date.
• National Recognition: Home to a National Enterprise Technology Center.
• Academic Collaboration: Established industry-academia partnerships with numerous prestigious universities.
• Standard Setting: Active participant in formulating multiple national and industry standards.

Our continuous innovation ensures we maintain an industry-leading position in efficiency, reliability, and cost-effectiveness.

Half-cut technology involves laser-cutting standard solar cells in half and then encapsulating them in series or parallel connections.

Key Advantages:

• Reduced Internal Losses: Increases power output by 5-10W.
• Minimized Hot Spot Effect: Enhances module reliability.
• Better Shading Tolerance: Improved performance under partial shading.
• Lower Mechanical Load Risk: Reduced risk of micro-cracks and breakage.
• Optimized Temperature Coefficient: Better performance in high-temperature environments.

Half-cut technology has become the industry mainstream, and Wuxi Taineng's entire product line now adopts this technology.

Multi-Busbar (MBB) technology utilizes a higher number of finer busbars to collect current more effectively.

Technical Advantages:

• Reduced Resistive Losses: Enhances power generation efficiency.
• Improved Light Reflection: Increases the effective light-receiving area.
• Lower Silver Paste Consumption: Reduces material costs.
• Enhanced Mechanical Strength: Improves overall module durability.
• Better Crack Resistance: Superior tolerance to micro-cracks.

WUXI TNSOLAR employs 9BB, 11BB, and even higher busbar counts, continuously optimizing product performance.

WUXI TNSOLAR has established a comprehensive Quality Management System (QMS) and obtained multiple international certifications:

• ISO 9001:2015 - Quality Management System
• ISO 14001:2015 - Environmental Management System
• ISO 45001:2018 - Occupational Health and Safety Management System

Quality Control Measures:

• Raw Materials: 156 incoming inspection items with strict supplier management.
• Production Process: 300+ quality checkpoints and 100% Triple EL Testing.
• Outgoing Inspection: Includes simulated unpacking, wet leakage current, and power tests.
• Continuous Improvement: Implementation of the PDCA cycle and Six Sigma management.

WUXI TNSOLAR products have obtained mainstream global certifications, including:

• Europe：CE, TÜV Rheinland, TÜV SÜD
• North America：UL, CSA
• Australia：CEC, SAA
• Asia：JET (Japan), KS (Korea), CQC (China)
• Others：INMETRO (Brazil), MCS (UK), etc.

All products comply with international standards such as IEC 61215 and IEC 61730, ensuring global market access.

WUXI TNSOLAR has established a comprehensive product traceability system:

• Unique Identification: Every module is assigned a unique barcode or QR code.
• ERP Integration: Complete production data is accessible via our ERP system.
• Detailed Records: Includes raw material batches, production process parameters, quality inspection reports, EL images, and more.
• Long-term Support: Supports information tracing for up to 25 years.
• Customer Access: Clients can query data online through dedicated accounts.

Our transparent traceability system ensures quality controllability and clear accountability.

Installation Precautions:

• Professional Installation: Hire a professional installation team and strictly follow local codes and regulations.
• Structural Load: Ensure the roof or mounting structure meets load-bearing requirements (≥25kg/m²).
• Optimal Tilt Angle: Adjust according to latitude (generally = local latitude ±10°).
• Azimuth Orientation: Face True South in the Northern Hemisphere and True North in the Southern Hemisphere.
• Shading Avoidance: Avoid shading from trees, buildings, chimneys, etc.
• Ventilation: Ensure proper heat dissipation by leaving a gap of ≥10cm behind the modules.
• Hardware: Use matching mounting structures and fasteners.
• Electrical Safety: Implement proper lightning protection and grounding.

For detailed installation instructions, please refer to the product manual or contact technical support.

The following factors should be considered when selecting system capacity:

• Electricity Consumption：Check your electricity bill to calculate daily or annual average consumption.
• Installation Area：Approximately 150-200W can be installed per square meter.
• Budget：Determine the scale based on your investment capability.
• Solar Resources：Consider the local annual equivalent utilization hours.
• Policy & Incentives：Understand local electricity tariffs and subsidy policies.

Reference Formula:System Capacity (kW) = Daily Consumption (kWh) ÷ Daily Peak Sun Hours (h)

We recommend consulting a professional designer for on-site assessment and system design.

Inverter Selection Principles:

• Power Matching: Inverter power rating should be approximately 80%-110% of the total module power.
• Voltage Matching: The string voltage must fall within the inverter's MPPT range.
• Channel Matching: Select the number of MPPT channels based on the number of strings.
• Environmental Adaptability: Consider temperature, altitude, and IP rating (Ingress Protection).
• Functional Requirements: Determine if features like energy storage or monitoring are needed.

Recommended DC/AC Ratios:

• Residential Systems: 1.1 - 1.2 times overloading
• Commercial Systems: 1.2 - 1.3 times overloading
• Utility-scale Plants: 1.3 - 1.5 times overloading

Yes, regular cleaning can improve power generation efficiency.

Cleaning Recommendations:

• Frequency：Generally 2-4 times per year; increase frequency in dusty areas or areas with heavy bird droppings.
• Timing：Early morning or evening; avoid high-temperature periods.
• Method：Use a soft cloth/brush and clean water. Do not use corrosive solvents.
• Tools：Specialized cleaning equipment or high-pressure washers can be used (pressure ≤35 bar).
• Safety：Take anti-electric shock measures; professional operation is recommended when necessary.

Regular cleaning can increase power generation by 3%-15%, depending on the degree of environmental pollution.

Routine Inspection:

• Monitor Data: Monitor power generation data and troubleshoot abnormalities promptly.
• Visual Check: Observe module surfaces for damage or soiling.
• Structure: Check if mounting structures are secure and free from corrosion.
• Inverter: Listen for abnormal noises during inverter operation.

Periodic Maintenance (Recommended 1-2 times/year):

• Performance: Professional testing of module power degradation.
• Thermal Imaging: Infrared thermal imaging to detect hot spots.
• Electrical: Tightening of electrical connections and insulation testing.
• Inverter Service: Cleaning inverter filters and checking fans.
• Grounding: Grounding system resistance testing.

It is recommended to sign a long-term maintenance contract with a professional O&M company.

Snow accumulation will temporarily affect power generation, but it has the following characteristics:

• Auto-sliding：The smooth surface and tilt angle allow snow to slide off automatically.
• Rapid Melting：Dark modules absorb heat, accelerating snow melting.
• Bifacial Gain：High albedo (reflectivity) of snow allows bifacial modules to generate more power.
• Low-Temp Advantage：Module efficiency is higher in low-temperature environments.

Recommendations:

• Installation: Increase the installation tilt angle by 10°-15° to facilitate snow shedding.
• Cleaning: Use soft tools to gently remove excessive snow accumulation.
• Warning: Avoid using sharp tools to scrape the module surface.

Warranty Commitments:

• 12-Year Product Warranty：Covers materials and workmanship. Free repair or replacement for issues caused by material or manufacturing defects.
• 25-Year Linear Power Output Warranty：
  • Degradation in Year 1: ≤2%
  • Annual degradation thereafter: ≤0.55%
  • Power output at end of Year 25: ≥84.8%

After-Sales Service:

• Global Presence: Service centers in 20+ countries.
• Support: 24-hour customer service hotline response.
• Expertise: Professional technical support team.
• Supply Chain: Rapid spare parts supply.
• Follow-up: Regular customer (visits/follow-ups).

Application Process:

1. Contact Support: Call +86-0510-87328999 or email mailto:info@wxtn-solar.com.
2. Provide Details: Submit product model, serial number, purchase proof, issue description, and photos.
3. Preliminary Diagnosis: Remote assessment by technical personnel.
4. On-site Inspection: Engineer dispatched if necessary.
5. Solution Proposal: Repair, replacement, or return.
6. Solution Implementation: Rapid execution of the agreed solution.
7. Follow-up: Confirmation of resolution and feedback collection.

Response Time Commitments:

• Phone/Email: Within 2 hours.
• Technical Solution: Within 24 hours.
• On-site Service: Within 48-72 hours (subject to location).

Warranty Exclusions:

• Improper Handling: Damage caused by improper transportation, storage, installation, or usage.
• Unauthorized Modification: Unauthorized modifications, repairs, or disassembly.
• Force Majeure: Natural disasters (lightning strikes, hail, floods, earthquakes, etc.).
• Extreme Conditions: Environmental conditions exceeding design limits.
• Normal Wear: Normal wear and tear (e.g., slight oxidation of the frame).
• Cosmetic Issues: Aesthetic issues that do not affect performance (e.g., minor color variations).
• Missing Proof: Inability to provide valid proof of purchase.
• Expired Warranty: Claims made after the warranty period has expired.

Specific cases are subject to the warranty terms. It is recommended to read the product manual and warranty documents carefully before installation.

Transportation Requirements:

• Packaging: Use original factory packaging and ensure it is securely fastened.
• Orientation: Transport flat; avoid side-loading or standing upright.
• Stacking: Do not exceed the stacking limit indicated on the package (generally ≤ 3 layers).
• Gap Filling: Use airbags or soft padding to fill voids.
• Protection: Implement waterproof, moisture-proof, and shock-proof measures.
• Driving: Avoid sudden braking and severe bumps.
• Vehicle: Transport vehicles must be equipped with rain covers/tarpaulins.

Precautions:

• Handling: Handle with care during loading and unloading; throwing is strictly prohibited.
• Forklifts: Pay attention to fork length and position when using forklifts.
• Inspection: Check the integrity of the outer packaging immediately upon arrival.
• Damage Control: If damage is found, take photos immediately and contact the supplier.

Storage Environment:

• Indoor Storage: Dry, well-ventilated, and free from corrosive gases.
• Temperature: -40°C ~ +85°C.
• Humidity: ≤80% RH (Non-condensing).
• Protection: Avoid direct sunlight and water immersion.
• Safety: Keep away from fire sources and heat sources.

Stacking Requirements:

• Placement: Maintain original packaging and place horizontally.
• Stacking Limit: Follow the stacking limit on the package (generally ≤ 3 layers).
• Elevation: Pallets should be elevated, with a ground clearance of ≥10cm.
• Aisle Width: Ensure aisle width is sufficient for handling and inspection.
• Inventory Management: Follow the First-In-First-Out (FIFO) principle to avoid long-term accumulation.

For long-term storage (> 3 months), regular inspection of packaging integrity is recommended.

Inspection Process:

1. Check Packaging: Inspect outer packaging for damage, deformation, or water stains.
2. Verify Information: Check carton number, quantity, model, and batch number.
3. Random Check: Randomly open cartons to inspect module surfaces.
4. Check Accessories: Ensure junction boxes, cables, and connectors are intact.
5. Document Evidence: Take photos/videos immediately if issues are found.
6. Sign-off: Sign upon confirmation of accuracy; note any abnormalities if issues exist.

Common Issue Handling:

• Damaged Packaging: Open and inspect; take photos as evidence.
• Cracked Modules: Reject delivery or store separately; contact supplier.
• Quantity Discrepancy: Note the difference on the delivery note.
• Wrong Model: Suspend unloading; contact for confirmation immediately.