Actually 12volts at 200watts no need for mppt charger!!! See Spec sticker has everything there. We will guarantee that after 30 years it will produce 75%. 200 Watt 12 Volt Mono Solar Panel 200w 12V Off Grid RV Marine Battery Charging.The item "200 Watt 12 Volt Mono Solar Panel 200w 12V Off Grid RV Marine Battery Charging" is in sale since Tuesday, February 23, 2021. This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Solar Power Supplies\Solar Panels & Kits". The seller is "texassolar" and is located in Garland, Texas. This item can be shipped to United States.