update to add solar as a negative end use

[daryaguettler]

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[codecov-commenter]

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Codecov Report

❌ Patch coverage is 35.48387% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 24.7%. Comparing base (0c028f8) to head (aafbc1f).

Files with missing lines	Patch %	Lines
epengine/models/inference.py	35.4%	20 Missing ⚠️

❌ Your project status has failed because the head coverage (24.7%) is below the target coverage (90.0%). You can increase the head coverage or adjust the target coverage.
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Additional details and impacted files

@@           Coverage Diff           @@
##            main     #34     +/-   ##
=======================================
+ Coverage   24.6%   24.7%   +0.1%     
=======================================
  Files         36      36             
  Lines       4378    4392     +14     
  Branches     459     459             
=======================================
+ Hits        1080    1089      +9     
- Misses      3253    3258      +5     
  Partials      45      45             

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