I had some time and went to Trsat (an upper area of Rijeka) to the church park to try out my setup – overall i am pretty happy what one can get between Temu, AliExpress and eBay. Total cost with the Powerbanks probably 250€. Not too heavy in backpack either.
For now i carry 2 20000Mah (..at 3.7V, at 5V 15k, 12V 6Ah – ca. 75Wh) Powerbanks which i use with 5V to 12V USB dongles (9V for the white lights) and 12V PD trigger modules. As backup i have a heavy 12V lead acid 9Ah, 6Ah usable – (60%~, also 75Wh) that i could carry also around (and a solar controller and a 40W panel, but that all needs a car then).
Below a video of a first trial.
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