PV Cells

ESP

Notes

Device Concept

Boeing’s spectro Lab Multi-juntion

NASA LaRC’s ESP Module

Energy Source

Solar

Negatively charged Regolith

Unit Area

10 cm × 30 cm

10 cm  × 30 cm

Incident Energy

40 Watts

14.7 watts^*

^*both Lunar day and night operation

Efficiency

40%

90%

^*Efficiency of circuit is much higher (> 90%)

Collected Power

16 Watts

5.88 watts

Operation under

Lunar day only

Lunar day and night

Energy Storage for kick-off power

No

Yes, for kick-off start

Dust Mitigation

No

Yes

Fabrication

Complex CMOS skill required

Fairly easy

In-house Fab