September Update : Year To Date Performance

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If solar is to gain the trust of homeowners, then it must be a dependable energy source.

Each month we measure the actual energy produced versus the estimated amounts we originally shared with our customers. We believe accurately measuring energy production is not a nice thing to do. It is a core responsibility for any ENERGY company.

We have been tracking our systems since day 1.

Here is how we are doing at the end of August 2025:

Year to date, we remain slightly below our estimated production with systems reporting 98% of expected production.

For the new quarter, we are at 104.2% of target. The 3rd quarter has been strong for solar and probably drier than usual here in the Mid Atlantic region. Sure feels drier than usual, especially in the mornings when there is no dew on the ground.

Seriously though, we missed every month in the second quarter and 5 out of the first 6 months in the year so it is nice to see positive number up there.

Year to date, the bigger picture view, is that we are tracking 98% of estimated production with eight months completed. It is not perfect. But it is pretty darn good. Take a look around and you will not see any other company sharing actual performance versus estimates given to customers during the sales process. Even the publicly traded companies like Sunrun don’t go there. We do. Monthly.

The other metric we measure monthly is run time. This simply measures whether any of our systems were not producing during the month. Run time year to date 2025 and lifetime are shown below:

For the record, there are moving electrons in your solar system but no moving pieces. Yes, electricity is flowing ( or is it). But there are no fan belts to change or oil to drain and refill. We expect our systems to run for years and years and years and then decades without any issues.

Questions? Comments? Surprised? Let us know…

Butterfly PBC
7250 Hollywood Road
Suite Nine and Three Quarters
Fort Washington, PA 19034

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Main: (267) 616-8564‍

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questions@butterfly.energy

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