update PV costs

[Piranias]

Fix #xxx

Changes proposed in this pull request:

• the BOS component costs taken from 2014 are extrapolated for 2019 and 50% higher BOS costs are added because we look at a rooftop system (see working paper section 1a))
• this results in higher BOS costs
• the module prices are lowered (after more research). For more information see working paper.
• the lifetime of PSI is set to 25
• OM costs are lowered (see working paper)
• fix number of houses to 20 ( 8 flats per storey makes 40 flats per house with 5 storeys, makes 800 in total (and 480 for 3 storeys))

The following steps were realized, as well (required):

• Update the CHANGELOG.md
• Check if full simulation tests pass locally (EXECUTE_TESTS_ON=master pytest)

Also the following steps were realized (if applies):

• Use in-line comments to explain your code
• Write docstrings to your code
• For new functionalities: Explain in readthedocs
• Write test(s) for your new patch of code

Please mark above checkboxes as following:

• Open
• Done

In case of an error due to linting, run black . --exclude docs/ and push your changes.
Note that in case you do not fix a whole issue you should start your PR with Address #xyz.

_{For more information on how to contribute check the CONTRIBUTING.md.}

[SabineHaas]

Shouldn't specific_costs_om be adapted, as well, in example inputs?

[Piranias]

so if I understand correct build 3.6 is deprecated ("Removed python 3.6 from github actions builds as there was a error when installing reverse_geocoder of [report] option of MVS RuntimeError: Python version >= 3.7 required." in PR#271)

[SabineHaas]

so if I understand correct build 3.6 is deprecated ("Removed python 3.6 from github actions builds as there was a error when installing reverse_geocoder of [report] option of MVS RuntimeError: Python version >= 3.7 required." in PR#271)

Right, we decided not to test 3.6 anymore. I wonder why it is still triggered.. 3.6 is not stated as version to be tested in the workflow anymore:

pvcompare/.github/workflows/main.yml

Line 26 in 763df8d

python-version: [3.7]

[SabineHaas]

I think we decided on 30 houses.

[SabineHaas]

I've just seen that you say, there we have 8 flats per storey, not 4. 👍
Could you add the explanation to the changelog please? ( 8 flats per storey makes 40 flats per house with 5 storeys, makes 800 in total (and 480 for 3 storeys))

[Piranias]

see the calculation in the description. We assumed a storey had 4 flats, but it's actually 8.

[SabineHaas]

Did you understand why the plot does not work? If not, please write an issue so that we can fix that later.

[SabineHaas]

So, after adapting changelog.md (more explanation) you can merge :)

[SabineHaas]

so if I understand correct build 3.6 is deprecated ("Removed python 3.6 from github actions builds as there was a error when installing reverse_geocoder of [report] option of MVS RuntimeError: Python version >= 3.7 required." in PR#271)

Right, we decided not to test 3.6 anymore. I wonder why it is still triggered.. 3.6 is not stated as version to be tested in the workflow anymore:

pvcompare/.github/workflows/main.yml

Line 26 in 763df8d

python-version: [3.7]

For documentation: I had to uncheck a check box in "Branch protection rules" in "Settings/Branches".
From now on 3.6 build should not be triggered anymore @MaGering @Piranias