Combiner Mismatch Report

Use the Combiner Mismatch Report to identify likely mismatches between PV combiner locations in the site layout and their SCADA current tags. It analyzes each PV block and recommends mappings to review; it does not change field wiring, GIS, or SCADA mappings.

Open a project and go to Reports → Combiner Mismatch Report.

How the report works

The report uses a fixed 14-day window of high-resolution combiner-current data, ending on the date you select. It looks for moving cloud shadows crossing a PV block. When the layout and tags are correct, combiner currents should decrease in the same spatial order as the shadow. A tag that repeatedly responds where another combiner is located may be swapped.

It also compares combiner capacity with current. On the same days, larger combiners should generally draw more current than smaller combiners. This is an independent check that can identify a potential mismatch even when useful moving-cloud patterns are unavailable.

The report needs combiner current tags, combiner locations in the site layout, and combiner nameplate capacities. It skips days without a clear moving cloud edge or sufficient data.

Generate a report

Select the end date for the analysis window. The report automatically uses the preceding 13 calendar days, for 14 days in total.
Select Generate report.
Wait for block results to finish loading. The site map and block table update as blocks are analyzed.

If the selected window has no high-variability days, select a different end date that includes cloudier conditions. A block can also show a warning or fail when it has too little usable moving-cloud data, no combiner-current tags, or an analysis error.

Completed reports remain available from the Report history tab. Select a past report to review its saved results.

Review block results

The block table and site map show the status of every analyzed PV block:

Swaps: the report found a suggested remap.
Review: there is a finding that needs investigation but is not a suggested remap.
Clean: enough useful data was available and no mismatch was found.
Warning or Failed: the block could not be reliably analyzed. Try a different 14-day window or check the available data and layout.

Select a block in the table or on the map to open its time-series viewer. The viewer replays combiner current by capacity across the selected block. Compare Before (the tagged currents) with After (the recommended remap) to see whether the current timing matches the combiner locations more closely.

Use Download CSV after the report completes to share the block results and findings outside Proximal.

Interpret findings

The results distinguish between the strength and type of evidence:

Confirmed: cloud timing and capacity-versus-current both identify the same combiners. Prioritize these for a mapping or field check.
Likely (timing): the cloud-order check remains consistent on later days. A capacity finding may be absent when the combiners have the same size.
Likely (capacity): current and capacity indicate a mismatch, but cloud timing did not confirm it. Review it, but do not treat it as a completed remap.
Walk the block: larger combiners appear to draw less current than smaller ones across the block. Individual pair recommendations are not reliable; check every combiner mapping in the block.
Investigate: there was insufficient useful data or the two checks disagree. Review the block before taking action.

For example, if two same-sized combiners repeatedly show each other's cloud arrival pattern, the report can recommend swapping their tags. Open the block, compare the Before and After replay, then confirm the mapping in the field or in the mapping table before making any change.

Limitations

A recommended swap is evidence to investigate, not proof that field wiring was changed. The issue may be in GIS, SCADA tags, or another mapping source.

The report can identify two-combiner swaps and some three-combiner mix-ups. More complex mapping problems may appear as multiple findings or as Walk the block. Incorrect nameplate capacities, missing layout data, and unusual combiner geometry can also affect the analysis. Correct layout issues before relying on the results.