In May 2018 the [Mars Helicopter Scout][1] (MHS) was approved to fly on the [Mars 2020 mission][2].

[![enter image description here][3]][3]

Author: NASA/JPL-Caltec.  

It's a solar powered helicopter drone with a mass of 1.8 kg and a coaxial rotor diameter of 1.2 m.

In this [recent publication][4]  about the design and development of the helicopter:
  

> The helicopter is powered by a Li-Ion battery system that is recharged daily by a solar panel. The energy in the battery is used for operating heaters to survive the cold Martian nights as well as operate the helicopter actuators and avionics during short flights lasting from 90 seconds to a few minutes. Depending on the latitude of operations and the Martian season, recharging of this battery through the solar panel could occur over one to multiple sols (Martian days).

The on board solar panel has a 544 cm$^2$ active cell area and is centered above the co-axial rotors.  

It is estimated that with an **available** battery capacity of about **36 Wh**, night-time survival energy usage will be **21 Wh** and approximately **10 Wh is available for flight.**  


Could not the duration and the frequency of the daily flights of the helicopter be enhanced considerably by recharging the battery with solar cells on a landing platform placed on the Mars 2020 rover ?


  [1]: https://en.wikipedia.org/wiki/Mars_Helicopter_Scout
  [2]: https://en.wikipedia.org/wiki/Mars_2020
  [3]: https://i.sstatic.net/2VQQl.jpg
  [4]: https://rotorcraft.arc.nasa.gov/Publications/files/Balaram_AIAA2018_0023.pdf