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AeternaSol 400W Solar Kit includes 2 premium N-Type 18BB monocrystalline 200W panels. It supports 12V (parallel/single-panel) and 24V (series) systems, with quick installation, stable output and strong low-light performance. Q: Is it normal that actual power is lower than labeled 200W? A: Yes. The 200W rating is tested under STC lab standards. Real factors like temperature, sunlight angle, shade and line loss reduce output. Power decreases 0.3%-0.5% per °C over 25°C, so lower real power is typical. Q: Why lower power with PWM charge controller vs MPPT? A: MPPT tracks the maximum power point to collect more energy. Ordinary PWM cannot optimize output and wastes power. We recommend using an MPPT controller for better efficiency. Q: How to set the mounting angle for maximum power? A: Annual optimal tilt ≈ local latitude ±5~10°. Lower angle for summer, higher for winter. Face panels toward the south. brand:AeternaSol Solar panel type: N-Type Monocrystalline Electrical current:DC Dimensions:52.76×26.38×1.18 inch Two panels Weight:39.24lb Color:Black Material:Monocrystalline Silicon Rec. use:Garden, Boat, RV, Roof, Walkway, Etc
