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Looks like a supercapacitor and no battery did the trick (during the day at least) #solarpi
Do test run of solar system #solarpi
Put the whole thing together and see if it explodes #solarpi
Write about solar pi 
#dumb
It seems to be working?! #solarpi
Install supercapacitors #solarpi
Try running it without the battery pack, just solar + ultracapacitors #solarpi
continue insulating home indoor garden 
#life
Charge the 4x18650 pack #solarpi
Test cellular on a sunny day #solarpi
It wasn't a loose wire, there's something wrong with the switching or something #solarpi
Charge it from the sun with no load, see if that fixes it #solarpi
Wait for good 18650s to arrive #solarpi
Wait for supercapacitors to arrive #solarpi
Find a better battery pack that can charge and supply power at the same time #solarpi
Insulate sides (at night) 
#vanrossum
Turn it off and on again, because that fixes literally everything (worked this time anyway). #solarpi
👷♂️ repair greenhouse with transparent tape 
#life
Wait for good 5v regulator to arrive #solarpi
Solder up supercapacitor USB lead #solarpi