When Charlotte Meerstadt put solar on her Amsterdam home, the numbers made sense.

Then Charlotte moved to the U.S. and rented out the apartment. The solar panels kept doing exactly what they were supposed to do: producing cheap, clean power. But, while the tenant received the lower utility bill, Charlotte still owned the panels and had no clear way to capture the savings her asset was creating.

That mismatch revealed a bigger problem hiding across rental housing and distributed energy: the person who can invest in clean energy is often not the same person who gets the financial benefit.

Under 1% of rental rooftops have solar.

Now put that next to 49 million rental units in the U.S., including roughly 23 million apartments, and you start to see the size of the opportunity Charlotte Meerstadt stumbled into.

In this episode, Charlotte, Founder and CEO of Fram Energy, joins Nico to explain how she turned that insight into a company helping property owners, developers, and energy asset owners measure, bill, and collect the value their projects produce.

She also shares how early customer conversations shaped the product, why real-world complexity can become a moat, and what she had to unlearn as an engineer to become a founder.

Expect to learn:

🔹 Why solar savings get complicated when owners and tenants try to split the value

🔹 How meter data can become revenue asset owners can collect

🔹 Why billing, tariffs, permissions, and customer trust matter after the system is built

🔹 How customers pulled Fram from rental solar into larger energy transactions

🔹 Why Charlotte believes founders should keep removing themselves from the equation

This episode might help you see the business model problems that can hold back otherwise strong projects.

Are there other technologies you’ve scouted on the frontlines of the Clean Energy Revolution that you think we should be covering here on SunCast?

Hit us up - [email protected] with your feedback & recommendations.

If you want to connect with today's guest, you’ll find links to their contact info in the show notes on the blog at https://suncast.media/episodes/.

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Remember, you can always find resources, learn more about today’s guest and explore recommendations, book links, and more than 950 other founder stories and startup advice at www.suncast.media.

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(00:00) The Rental Rooftop Solar Gap

(02:14) The Landlord Split Incentive Problem

(05:05) Evaluating Workarounds for Rental Properties

(07:43) Identifying a Scalable Market Opportunity

(12:38) Leveraging Stanford Network for Early Traction

(15:14) Early Entrepreneurship and Formative Upbringing

(22:45) Raising Venture Capital as a Solo Founder

(28:46) Turning Hardware Dependencies into a Moat

(31:06) What Engineers Must Unlearn as Founders

(38:31) Converting Interval Data into Tenant Invoices

(44:22) Utility API Integrations and Compliance Hurdles

(51:52) Expanding Beyond Residential to Commercial Settlements

(55:42) Disciplined Market Focus and Saying No

(1:03:00) Achieving Zero Churn Through Customer Trust

(1:08:09) Founder Delegation and Stress-Testing Independence