美国采购需求：不锈钢圆柱体、太阳能系统、太阳能系统用圆柱体、不锈钢、太阳能、太阳能圆柱体

I'm looking to purchase two 500-liter solar water tanks made from dual coil stainless steel, specifically 2205 grade, fitted with stainless NPT connections suitable for the US market. Please note that I do not require any electric heaters for these tanks. If the tanks meet my specifications, I would also like to order three additional complete solar water systems. However, for these systems, I do need the tanks to be equipped with electric heating rods as a backup option. Please provide your quotation and lead times for these products.