400W Solar Panels, 2 Pcs 200 Watt N-Type Solar Panel, 25.6% High Efficiency — Open-Box, 8% Off

【Upgraded 18BB N-Type A+ Cells, Up To 25.6% Max Conversion Efficiency】Equipped with cutting-edge 18 busbar N-Type A+ monocrystalline cells, this 400 watt solar panel hits 25.6% photoelectric conversion efficiency, outperforming outdated 16BB/9BB panels. Finer 18BB grid lines boost light absorption, cut internal resistance, deliver far more power under cloudy, dawn/dusk weak light, and bring stable power output for your 12V off-grid battery system.

【18BB Optimized Grid Design, Minimize Hot Spots & Micro-Cracks, Longer Lifespan】The upgraded 18BB uniform current distribution structure solves core defects of traditional low-busbar panels. EtnalSolar's 400 watt solar panels effectively suppresses hot spot overheating and cell micro-cracks caused by uneven current transfer, greatly reducing long-term power attenuation. With first-year degradation ≤1.0% and annual decay only 0.4%, it maintains steady power generation for up to 30 years of outdoor use.

【Built-In Bypass Diodes + Low Temperature Coefficient, Stable Output In Shade & High Heat】Integrated bypass diodes offset power loss from partial shading (trees, buildings, uneven sunlight) and avoid overheating damage. Adopted premium N-Type silicon with ultra-low temperature coefficient, far less power drop in hot summer, desert and coastal high-temperature environments. Works reliably from -45℃ to 85℃ without obvious efficiency decline.

【Fully Expandable & Wide Compatibility for All 12V Solar Setups】Specially engineered for 12V battery charging, perfectly compatible with all PWM/MPPT charge controllers and mainstream portable power stations. Multiple panels can be wired in series or parallel to build 24V/48V large-capacity solar systems. Ideal for RV, camper van, yacht, cabin, farm rooftop and emergency off-grid backup power.

【IP68 All-Weather Durability & Easy Diy Installation with Reliable Warranty】Constructed with 3.2mm impact-resistant low-iron tempered glass, corrosion-proof anodized aluminum frame and reinforced corner guards, rated IP68 fully waterproof & dustproof. Withstands 2400Pa wind load and 5400Pa snow load to resist rain, snow, hail and salt fog. Pre-drilled mounting holes & standard MC4 connectors support quick installation. We offer 10-year material & workmanship warranty plus 30-year power output guarantee (87.4% power retention after 30 years).

EtnalSolar 200W N-Type 18BB High Efficiency Solar Panel – Advanced Off-Grid Power for RV, Marine, Rooftop & Farm Tired of low-output 16BB solar panels that lose power in hot weather or cloudy days? EtnalSolar upgrades to the latest 18BB N-Type monocrystalline technology, delivering higher conversion efficiency, weaker attenuation and stronger all-climate adaptability to solve your outdoor power anxiety once and for all. Core Upgrade: 18BB Next-Generation Cell Technology (Better Than 16BB Panels) 1.25.6% Leading Conversion Efficiency Our A-grade 210mm N-Type cells achieve 25.6% energy conversion rate, much higher than ordinary P-Type 21%–22% and conventional 16BB N-Type panels. More sunlight is converted into usable electricity, so you get extra power even in weak morning, evening or overcast light. 2.Finer 18 Busbar Layout for Stable Long-Term Performance Compared with 16BB structures, the 18 evenly distributed thin busbars optimize current transmission across the whole cell surface. Internal resistance is significantly reduced, which eliminates hot spots and micro-cracks—the top two causes of solar panel failure. First-year power degradation is controlled below 1%, with only 0.4% annual decay afterward, securing consistent power for 30 years. 3.Outstanding Weak Light & High-Temperature Adaptability Built-in bypass diodes automatically isolate shaded cell areas to avoid full-panel power loss. Combined with N-Type’s excellent low temperature coefficient, the panel suffers minimal power attenuation under extreme heat, making it the perfect choice for desert, tropical and coastal high-temperature regions. Heavy-Duty All-Weather Construction for Decades of Outdoor Exposure Every component is selected for long-lasting outdoor durability: 3.2mm low-iron tempered glass: High light transmittance, anti-hail impact, UV-resistant Double-layer EVA encapsulation + IP68 TPT backsheet: Fully sealed against rain, dust, moisture and sea salt fog Reinforced anodized aluminum frame with thick corner guards: Anti-rust, anti-deformation Industrial mechanical load standard: 2400Pa wind resistance, 5400Pa snow bearing capacity, works stably from -45℃ to 85℃ Flexible System Matching & Wide Application Scenarios Optimized for 12V lead-acid/lithium batteries, compatible with all mainstream PWM & MPPT solar charge controllers and portable power stations. Flexible series/parallel connection allows you to expand to 24V/48V systems according to your energy demand. Perfect for multiple usage scenarios: ✅ RV, Camper, Van Road Trip Daily Power Supply ✅ Yacht, Boat, Marine Onboard Battery Charging ✅ Remote Cabin, Off-Grid House Daily Backup Power ✅ Farm Rooftop, Shed, Outdoor Agricultural Equipment Power ✅ Camping, Outdoor Emergency Power Reserve User-Friendly Installation Design The panel reserves pre-drilled mounting holes on all four sides of the aluminum frame, matching universal solar mounting brackets for DIY or professional quick installation. Equipped with standard MC4 solar connectors, plug-and-play without complicated wiring. Each panel undergoes strict factory EL testing to ensure zero hidden cell defects before delivery. Standard STC Technical Parameters Max Power: 200W | Vmp: 23.04V | Imp: 8.68A | Voc: 25.18V | Isc: 10.05A Max System Voltage: 1000V DC | Dimension: 52.7×26.38×1.18 inch | Weight: 19.62 lbs Note: 200W rated power is tested under Standard Test Conditions (1000W/m² irradiance, 25℃ cell temp, AM1.5 spectrum). Actual output will fluctuate with sunlight intensity, temperature and installation angle, which is normal and not product quality defect. Worry-Free After-Sales Warranty & Technical Support EtnalSolar provides comprehensive quality protection: 10-year full warranty for material defects and workmanship issues, plus a 30-year linear power performance guarantee (retains 87.4% of original power output after 30 years). Our professional technical support team offers one-on-one guidance for system matching, installation angle adjustment and troubleshooting. Purchase & Installation Tips This solar panel cannot directly power electrical loads; it must be matched with a solar charge controller to charge batteries. Recommended installation angle: Adjust 15° higher than local latitude in winter, 15° lower in summer to maximize power generation. Keep the panel surface clean and avoid long-term partial shading to maintain optimal power output. Confirm your charge controller’s maximum input voltage and battery system voltage before purchasing to ensure compatibility.