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I am building a portable solar generator that I want to be able to switch between 2 charging sources. When the AC charger is plugged, it should disconnect the solar panels.

Availability of components and cost is an issue in my country so i am wondering whats the simplest way to do this?

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  • \$\begingroup\$ Simple solution a blocking diode from the Solar Panel. This will be in series and reverse biased if the charger is greater than the PV \$\endgroup\$ – Tony Stewart EE75 Apr 16 at 5:09
  • \$\begingroup\$ My experience is that, with properly designed and reasonably modern AC/Solar chargers, it is unnecessary to disconnect a solar charger when connecting an AC charger. The solar charger will simply stop contributing when it detects a sufficiently high battery voltage. You could always use a diode for protection but this will lower the voltage going into the battery, thus preventing it from charging completely. \$\endgroup\$ – StarCat Apr 16 at 6:46
  • \$\begingroup\$ @StarCat wouldn't it be a problem with my ac charger if the solar charger has higher volts? \$\endgroup\$ – kosinix Apr 16 at 11:10

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