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I'm so turned around on SPDs. Do I need a breaker before the SPD off my panel (before controller). And 2nd question: My SPD has a ground receptacle. I'm running to earth and could hook it up but Wiring Unlimited states I should only ground my Batter Negative terminal and my controller chassis. (I'm not running an inverter).
How big is your setup?
Do you have a 1 or 2 panel setup, is it mobile?
In all honesty unless there is a local regulation on it, with a basic set up I would say use a DC breaker and don't stress.
Usually an SPD is earthed to the main DB earth point, or a spike in the ground.
