pvlib-python

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bishop88_v_from_i does not always converge

12

**Describe the bug** `bishop88_v_from_i` does not converge to a voltage solution when current is greater than short-circuit, and the reverse bias term is active. **To Reproduce** ``` pvlib.singlediode.bishop88_v_from_i(resistance_shunt=1000., resistance_series=1., nNsVth=2.3,...

cwhanse

Issue with Data NaN

1

Hello, previously I used pvlib to forecast the weather from August 5th to August 10th, and the result showed NaN (Not a Number) in the data source, preventing the data...

Catherine1030

Back to basics for diffuse fraction functions

2

**Is your feature request related to a problem? Please describe.** Our collection of diffuse fraction model functions (identified as DNI estimation models) is growing. Currently none of the functions supports...

adriesse

Inconsistent sign in irradiance.aoi_projection when result is close to 0

11

**Describe the bug** Inconsistent sign in **`aoi_projection`** when solar vector and surface normal are almost orthogonal for the front and the back side of a module. This leads to a...

pasquierjb

Add an iotools function to read ECOSTRESS (ASTER) spectral albedo files?

2

The ASTER/ECOSTRESS projects provide a library of spectral albedo measurements for many ground surfaces. It can be browsed here (I suggest changing the default group to something other than "lunar"):...

kandersolar

nan irradiances produced by gti_dirint

2

@adriesse and I have encountered what we think is an undesirable behavior of the `gti_dirint` function. Specifically, the reverse transposition method sometimes returns nan irradiances (e.g., GHI) when AOI>90. This...

AdamRJensen

CD/CI tools for docstring format validation

1

Moving here conversation from #1693 **Description:** Right now, docstring writing is left up completely to the contributors, who may not apply the correct style format. In that issue, a tool...

echedey-ls

Functions to consider making private

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I noticed we have several functions that don't have pages in our API reference, but are also not private (name doesn't start with `_`): - [pvlib.iotools.midc.format_index](https://github.com/pvlib/pvlib-python/blob/v0.9.5/pvlib/iotools/midc.py#L105) - [pvlib.iotools.midc.format_index_raw](https://github.com/pvlib/pvlib-python/blob/v0.9.5/pvlib/iotools/midc.py#L129) - [pvlib.iotools.srml.format_index](https://github.com/pvlib/pvlib-python/blob/v0.9.5/pvlib/iotools/srml.py#L121)...

kandersolar

**Describe the bug** GTI-DIRINT calculates *absolute* air mass internally and uses it for three things: - kt' - disc/dirint - perez **Expected behavior** For kt'and perez *relative* air mass must...

adriesse

ModelChain.run_model error with pvwatts_dc, sandia inverter model, and multiple arrays

1

**Describe the bug** When a ModelChain is instantiated with the PVWatts DC model, the Sandia inverter model, and multiple arrays, [this line](https://github.com/pvlib/pvlib-python/blob/ef4e31b0caa005c367cb20a6eda4e3b79f963dfe/pvlib/modelchain.py#L2054) converts each DataFrame (output from pvwatts_dc) to a...

cwhanse