Why the system, that's has the internal energy buffer cannot be used the whole night without external battery? It's like a flashlight, that cannot use inbuilt batteries, but needs external power source.Nightvision require a suit energy supply to function. Unfortunately its complementary tech portable solar panel does not provide energy at night, and the Nightvision's internal buffer of 120 kJ will quickly drain in a few seconds. Getting initial use out of Nightvision requires charging a modular battery to stay online over night.
Or have been on the home planet such short nights?