The Solar Water Pumps | Solco Hobby Mill is suitable for heads of up to 20m and flow rates of up to 4000L a day and is a low technology product that requires minimal maintenance. The Solar Water Pumps | Solco Hobby Mill consists of a standard short pump drive with a 50mm Sun Mill pump and a 40W or 60W solar panel mounted on a fixed frame. The pump is driven directly from the solar panels, however, a power maximiser can be fitted to boost performance if required. The Power Maximiser mus be included if automatic switching equipment is needed. The Solar Water Pumps | Solco Hobby Mill is manufactured from non-corroding materials that deliver long life with just a few minutes maintenance every 3 months. The Solar Water Pumps | Solco Hobby Mill carries a limited 12 month warrenty.