Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

How can I test different solar solutions in BEopt?

asked 2023-06-22 22:29:46 -0500

jwood80's avatar

updated 2024-01-02 10:10:20 -0500

Is there a way to set the particular type of rooftop solar to be modeled in BEopt? The watts/cost as well as watts/SF are different for lots of different solar suppliers and module types. How do I specify, or at least how do I know what BEopt is assuming so that I can see if my actual solution is better/worse than what was assumed in the optimization?

edit retag flag offensive close merge delete

2 Answers

Sort by ยป oldest newest most voted

answered 2023-06-23 19:07:33 -0500

BEopt models generic PV modules, not specific products on the market. (In the same way that it models generic HVAC systems and water heaters with a certain rated efficiency level, not specific manufacturer's products.) BEopt uses the PVWatts model to estimate PV electricity production, where PVWatts is a very popular software tool used by industry. You can see the PVWatts documentation (click on Help) if you want to know more about how that model works and what assumptions it uses.

edit flag offensive delete link more

answered 2023-06-23 06:32:38 -0500

jpierce's avatar

updated 2023-06-23 06:34:19 -0500

See Tools > Options manager. Note that the default costs are national averages circa 2018. You cannot edit the defaults but you can make a copy and modify that, and/or you can make adjustments for inflation and local costs via Site > Screen; PV has its own separate multipliers. See the built-in help for further details.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops


Question Tools

1 follower


Asked: 2023-06-22 22:29:46 -0500

Seen: 76 times

Last updated: Jun 23 '23