[RE-wrenches] Multi-Orientation PVWATTS Calculator

Jason Szumlanski jason at floridasolardesigngroup.com
Wed May 6 15:00:36 PDT 2026


I'm honestly not sure if this exists somewhere else, other than in software
like OpenSolar and paid design software that uses the PVWATT API.

So I built a web app that does just that. You can enter as many
orientations as desired and get a combined result. It includes the raw
data that
matches PVWATTS and a simple financial model.

You're welcome to use it.

https://floridasolardesigngroup.com/pvwatts


Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208
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