I am trying to add solar harvesting capability to my IoT device based on esp8266. I am using linear charge controller (MCP 73831) with solar input to charge a 500maH lipo battery.

An observation when the device is active (connected to a wifi AP) and solar input is available, the linear charger goes into CC mode even if the battery is fully charged. Possibly because esp8266 draws around 80-90mA of current on average during wifi connection process. (Solar charge current available is around 30-40 mA on average)

Is this safe? can this result in possible overcharging of the battery. More pointers on this will be highly appreciated.

Adding a diagram of the setup: setup

  • \$\begingroup\$ Do you have the ESP8266 directly connected to the battery? If so, why? \$\endgroup\$ – Finbarr Apr 3 '18 at 18:51
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    \$\begingroup\$ Need a diagram of your setup \$\endgroup\$ – Voltage Spike Apr 3 '18 at 18:53
  • \$\begingroup\$ Finbarr, esp is connected to the battery via 3.3v LDO. \$\endgroup\$ – Parin10 Apr 3 '18 at 20:45
  • \$\begingroup\$ @laptop2d added a diagram of the setup \$\endgroup\$ – Parin10 Apr 3 '18 at 20:48

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