[tau255]

Seeing the carnage I thought that there were no fuses for devices powered from 12V lead acid battery and some few hundred amps went through device.

But, this is not really a failure of solar power system, just failure of a Netgear device. It seems that it used it's battery as a high current source for when it needed more peak power for wireless transmission, thus the instability and failures when just plugged to USB charger. I don't think such constant drain and constant recharge was really healthy for the battery. I wonder if it was/is stated in manual that it was supposed to be used charged and unplugged and not really as full time usage device.