There is not much information on the correct grounding protocols - manual shows grounding of battery negative cable and inverter chassis but does not cover grounding of PV Panel and the mounting hardware or grounding of the negative supply cable from the solar panel to the charge controller.  Does anyone have a diagram showing recommended grounding for a 200 watt kit (2x100watt) with wanderer 30 amp PWM  charge controller.

Should you ground the pv panel chassis and metal support hardward?

Should you ground the negative conductor from PV Panel to charge controller and if so what is the best method of doing so (adding grounding conductor to the PV negative input terminal on charge controller for example)?

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