Excess DC in grid current

This signature means the inverter has measured too large a direct-current share in the current it feeds to the grid. The inverter detects it itself and logs it as a grid incident or grid fault event. Several inverter models offer a protection setting for the output DC component, and its threshold is set in the same menu as the leakage current threshold. The sources here do not give a numeric limit or say which failure modes cause this signature.

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• sentence 3: support check: partial - The passages show the OtherProtect menu sets thresholds for both leakage current and output DC component protection, but they don't say that several inverter models offer it; the evidence appears to come from CPS manuals.
• sentence 4: review: partial - The quoted text gives no numeric limit or causal failure modes, but the CPS passage points to a protection-parameter table (Table 5-6) that probably holds threshold values, so 'no numeric limit' is not clearly true of the sources. -->