[HIGH EFFICIENCY] WERCHTAY 200 watt solar panel is made of 9BB 166mm high quality A-grade cells. The conversion rate is as high as 22.8%, compared with 5BB solar panel, it has higher conversion efficiency and longer service life..[EFFICIENT PERFORMANCE] Bypass diodes of this panel solar protect the solar cells from overheating and allow the solar panel to continue working during accidental shading by bypassing the underperforming cells. WERCHTAY 200w solar panel is very suitable for charging 12 volt batteries. Multiple panels can be connected to 24 / 48 volt batteries in series..[SAFETY] 12v monocrystalline solar panel can withstand high winds (2400pa) and snow loads (5400pa). The outdoor solar panel is ROHS, CE, EL certified. It can help your device receive the most effective sunlight safely..[BUILT to LAST] Corrosion-resistant aluminum frame of this 200 watt solar panel 12v provides extended outdoor use that ensures the panel can last for decades. Both the IP67 junction box and IP67 MC-4 connectors have excellent waterproof function. Allows you to use it outdoors with confidence..[EASY to INSTALL] The solar panels 200 watt has a built-in MC-4 connector, which can easily insert and pull out the solar controller. The pre-drilled hole on the back of the panel helps install it in your vehicle, RV or other place you need it. Each of our solar panels is tested and inspected before leaving the factory to ensure flawlessness. If you have any questions, please feel free to contact us..[What You Get] WERCHTAY 200W 9bb solar panels come with a 24-month product warranty and a 25-year power guarantee. In addition, once you choose a WERCHTAY solar panel, you will receive our lifetime customer service. If you have any questions or problems with WERCHTAY 200w 9bb solar panel, please feel free to contact us. We will provide you with professional guidance to help you set up your solar system.