Mark Mikofski

Transformers

1

**problem** As an energy analyst, I need to know energy at point of interconnect, and that includes detailed transformer efficiency and losses, as well as ac collection losses and curtailment...

get PRISM rainfall data

4

**Problem** [PRISM](https://prism.oregonstate.edu/) doesn't have an intuitive API. It has rainfall and other info, but he interface is an AJAX call to a PHP backend which is hidden by JavaScript [here](https://prism.oregonstate.edu/explorer/dataexplorer/js/explorer.js)...

LGTM has 6 errors

3

**Describe the bug** LGTM shows 6 errors, at least one seems easy to fix there is a self alignment that seems redundant **To Reproduce** https://lgtm.com/projects/g/pvlib/pvlib-python/alerts/?mode=list&severity=error **Expected behavior** No errors? **Screenshots**...

Fix failing builds: python 2.7 is failing on travis CI & TravisCI.org is about to stop service anyway

2

Here's how it looks in the docs and README:  Follow the link: https://travis-ci.org/github/SunPower/PVMismatch, and you see it's the Python-2.7 build that fails. Has PVM officially dropped Py2? And anyway,...

https://github.com/SunPower/PVMismatch/blob/3f88910dd718b393234bb10b27c5426439d63a29/pvmismatch/pvmismatch_lib/pvsystem.py#L39-L45 Should we check modules first and then copy pvconst from there? Which takes precedence? No, actually we don't need to because when a string is instantiated, it checks already...

improve cell pattern documentation especially for cross ties

1

I had to reteach myself what was going on with the cell pattern used for `cell_pos` because it wasn't immediately obvious to me. The docstring for `cell_pos` is ok, but...

[ENH] model half cells

8

AFAIK there isn't a canonically accepted method to model half-cell modules in PVMismatch. I think it's possible to model a half cell by creating a total cross-tied module with 3...

cache last X calculations, and be smarter about checking cache before recalculating

1

This is definitely relevant to #48 and is a spinoff of @bmeyers original cache idea in the rejected PR #42 , and a continuation of the accepted PR #43, that...

ENH: Q: pick larger pmax?

1

**problem**: when interpolating for pmax, sometimes the interpolated value is *smaller* than the max! **question**: Should we always chose the larger of the two values: `np.maximum(interpolated_value, max_value)`? See https://github.com/SunPower/PVMismatch/commit/4943742f68a1819d258bf930d89c4b05f06b7630#r29806503

improve irradiance response

2

# Problem: When fitting parameters there seems to be a systematic bias with irradiance, typically increasing. This may be caused by PVMismatch's constant shunt resistance. Other models such as SAM/DeSoto...