> ## Documentation Index
> Fetch the complete documentation index at: https://docs.plantpredict.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Block Nodal Data

> Detailed parameters in the Block nodal data export

The Block nodal data provides timestep results at the block level, which aggregates power output from multiple arrays. Blocks represent logical groupings of arrays within the power plant structure.

## Description of Nodal Data Parameters

| Parameter           | Units               | Description                                                                                                                                       |
| ------------------- | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| Timestamp           | yyyy-MM-dd HH:mm:ss | Date and time for the calculation timestep                                                                                                        |
| Block Power         | W                   | Total AC power output from the block, calculated as the sum of all array transformer output powers multiplied by their respective repeater counts |
| Weighted Block POAI | W/m²                | Capacity-weighted average plane-of-array irradiance across all arrays in the block, useful for calculating block-level performance ratios         |