PV connections burned or melted
Burned or melted PV cables or connections are generally not covered under warranty. In most case this is due to any of the following reasons:
Solar cable
Cables with rigid core wire or rigid strands used.
Cables where the core wire has been soldered.
Cable too thin - remember that the current will be higher when the PV voltage is lower. For more information on cable thickness see the Wiring Unlimited book.