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System Advisor Model (SAM)

2018 vs 2020 version of SAM Sanity Check

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frohro
Topic Author

28 Jan 2020 01:48 #7905 by frohro

2018 vs 2020 version of SAM Sanity Check was created by frohro

Hi Paul,
For a sanity check, I'm doing a comparison between the 2018.11.11 version and the 2020.14 version, and it appears that PVwatts is giving me a large difference between the two, which may come from different battery efficiencies (which I don't see how to make equal). In the 2018 edition, the efficiency is set to 60.11% and in the 2020 version it is 89.14%. The Annual energy changes from 162 MWh to 203 MWh. This makes the NPV about five times greater. I'm enclosing the .sam files here for you to look at. Can you advise me?
Thanks,
Rob

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pgilman

04 Feb 2020 00:19 #7931 by pgilman

Replied by pgilman on topic 2018 vs 2020 version of SAM Sanity Check

Hi Rob,

We made some improvements to the battery model's current controller logic in the Beta version that results in the higher roundtrip conversion efficiencies.

Thanks,
Paul.

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