This solar board offers a more convenient charging mode. High water resistance level makes it highly waterproof. Furthermore, the efficient and transpsrent glass comes with a high light transmittance up to 93% to get more solar power. And high conversion rate up to 18% makes the poly silicon solar cell more efficient. This solar board offers a more convenient charging mode. High water resistance level makes it highly waterproof. Furthermore, the efficient and transpsrent glass comes with a high light transmittance up to 93% to get more solar power. And high conversion rate up to 18% makes the poly silicon solar cell more efficient. Widely Applicable This Poly Silicon Solar Cell can be widely used for outdoor charging, including but not limited to outdoor solar charging for motorcycles, snowmobiles, trucks, cars, and tractors. So you can use this crystalline silicon solar cell to go for timely charging in almost any location. Widely Applicable This Poly Silicon Solar Cell can be widely used for outdoor charging, including but not limited to outdoor solar charging for motorcycles, snowmobiles, trucks, cars, and tractors. So you can use this crystalline silicon solar cell to go for timely charging in almost any location. 18% Conversion Rate High conversion rate up to 18% helps save power to a great extent. 93% Light Transmittance Highly transparent glasses achieve a super high light transmittance up to 93% to get more solar power. 9V 3W Solar Board 9V 3W power makes it very practical. Specifications: Product type: Poly Silicon Solar Cell Material: Polysilicon Voltage: 9V Power: 3W IMP( mA): 333 Conversion rate: 18% Light transmittance: 93% Waterproof: Support Package size: approx. 23.5 * 15 * 3 cm/ 9.25 * 5.91 * 1.18 in Package weight: 412g Package List: 1 * Solar Board