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Try running it without the battery pack, just solar + ultracapacitors #solarpi
Put the whole thing together and see if it explodes #solarpi
Charge it from the sun with no load, see if that fixes it #solarpi
Work out why this thing isn't booting #solarpi
Looks like a supercapacitor and no battery did the trick (during the day at least) #solarpi
It wasn't a loose wire, there's something wrong with the switching or something #solarpi
Write about solar pi 
#dumb
Wait for terminal blocks to arrive #daylight
Get a 3G module working with the Pi Zero #solarpi
Duct tape enough insulation to run the solar system outside for a while #solarpi
Set up 3G SIM card #solarpi
Turn it off and on again, because that fixes literally everything (worked this time anyway). #solarpi
Bang head against mystery problem #solarpi
Charge it and try starting it up again to see if it was just a loose wire #solarpi
Discover the "good" 18650s were unprotected and as such a small explosion risk #solarpi
morning session on solar panel reading
launch solar optimization 
#stekker