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Due to the nature of the final project to be autonomously navigating Mars, all power supplies have to be portable, and rechargable.
As a result all experiments and prototypes have been designed and implemented using rechargable battery system.

Numerous commercial power supplies have been tested:

                            booster converter          Buck/Boost converter boosts single LiPo 3.7v or single LiFePo 3.2 v to 5.2volts to power Raspberry Pi model 3B.
                                                                                                                                     Works well for this 
purpose but single cell will not run the unit for more than a couple of hours.

single lipo usb charger          USB-powered charger for single LiPo 3.7v. This charges one in about 3.5 hours. It will also charge 2 LiPo (3.7v 2.6Ah) cells
                                                                                                  connected in parallel in about the same amount of time.

buck boost          
Buck/Boost converter sets the Weather Station internal voltage to 5.2 volts for the Raspberry Pi model 3B. The first prototype used a battery box
                                                                consisting of 2 LiPo cells (18650) in series to give an output of 7.4v. This is then reduced to 5.2 volts. Fited into the battery box is a charging                                                                                    pcb that will charge this arrangement (7.4v) from a standard USB port. This runs the weather station for 6 hours continuous.
This unit is also used
                                                                to regulate the solar panel output to 12volts or 5.2 volts.