The main objective of the study is to investigate the technological feasibility of implementing the GE⊕-LPS concept, and its role as a prototype for proposed cislunar scenarios supplying electric power to Earth. The methodological approach to the study has been to identify and validate the most simple and effective solutions which ould be practically implemented with known and existing technologies and approaches.

The Low-Cost Solar Panel Assembly GSTP Project has the high-level objective of increasing the European TRL level for innovative, high power to volume ratio, versatile, low-cost solar arrays, in this way contributing to cover the gap in this area with US manufacturers and to improve Europe global competitiveness. This new generation of solar power systems are also key to electrical-propelled missions in the whole range of orbits of interest

Radioisotope generators provide electrical power for spacecraft by converting the energy released by the decay of radioisotope fuel into electricity. Non-thermal converters (voltaic devices) make use of the photoelectric effect much in the same way a solar cell does. They are much easier to miniaturise for future chip-sized deep space probes, however performance quickly degrades due to radiation damage.

Today, Ge is used as a growth template for III-V based solar cells and also serves as the lowest active junction. While the thickness of the Ge on solar cell level is around 140µm, actually only 10-20µm are really active. Therefore, in order to become thinner and lighter, solar cell manufacturers start to thin down the Ge wafers after cell processing by grinding, etching or lift-off processes (to reduce weight). However, this Ge waste is today not recovered since no economical process exists.

Solar panel suppliers are developing a partially automated solar generator assembly process. A GSTP G617-241TA de-risk Activity: "Identification and baseline validation of solar cell test and measurement techniques for highly automated space solar generator manufacturing" was in the process to be completed, where measurement techniques have been identified and initially verified to be suitable to control the quality of the solar generator during automatic manufacturing.

TAS-B has high heritage on PPU for HET ranging from 1,35 kW up to 4,5 kW. In the frame another project, TAS-B  develops New Space PPU modules to drive thrusters in the same power range, for platforms with 100 V regulated power bus. In the frame of the project “BBK for Low Power PPU”, TAS-B addresses the low range of the New Space market: smaller thrusters for smaller platforms with lower unregulated bus.

During this activity, a Regenerative Fuel Cell System (RFCS) was designed and constructed, comprising a high temperature Proton Exchange Membrane (HT-PEM) fuel cell stack and a High-Pressure PEM (HP-PEM) water electrolyser stack. The RFCS was tested against a three Lunar day-night cycles profile.