A DIY solar water pump involves a simple build that combines solar panels, a controller, and a DC water pump in a stand-alone system. In short, the solar array generates DC electricityto power the water pump. With this system, you can also add a backup battery for continuous use. To build a DIY solar water pump, you'll need the following components: 1. DC Water pump 2. Solar pump controller or solar charge. Building a DIY solar water pump is not a complex task. However, we advise you to focus on the preliminary sizing steps; they are the most important. We've divided this build into the. A DIY solar water pump is a simple build with low complexity. You'll only need solar panels, a DC water pump, and a controller. Sizing your system is the most critical part of this DIY project. You must know your water needs and the characteristics of. We found out that the total cost for a DIY solar water pump ranges between $239 for an RV solar pump and $2845 for agricultural irrigation.