Rewbi YC Application

Summer 2024Active

Rewbi went through Y Combinator in the Summer 2024 batch as a Industrials company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Summer 2024
Industry: IndustrialsEnergy
Team size: 2
Status: Active
Launched: 2024

Founders

Thomas MargeFounder
Derek ModzelewskiCo-Founder and CTO

What Rewbi does

Rewbi uses AI to optimize grid-connected battery storage. We generate revenue by charging when electricity is cheap and discharging when electricity is expensive. We rent battery storage for a fixed fee per month, and we earn 2x that fee in monthly revenue by dispatching the battery optimally. Today, power companies use human traders to manually track grid conditions and update the battery’s dispatch schedule. However batteries can adjust their power output 100x faster than traditional power generation (e.g. hydro, coal, nuclear, gas), with the ability to go from full-speed charging to full speed discharging in under a minute. Electricity prices change every 5 minutes, often by 300% or more. Our AI better tracks 100s of live inputs, and it makes decisions faster than a human operator (with lower overhead!), improving revenue 2x.

Rewbi's YC application, reconstructed

Y Combinator application

Rewbi, Summer 2024 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Rewbi

Describe what your company does in 50 characters or less.

AI that doubles battery storage revenue

What is your company going to make? Please describe your product and what it does or will do.

We built software that uses AI to manage grid-connected battery storage. Our AI decides when to charge and discharge batteries based on electricity prices that update every 5 minutes. This lets battery operators double their revenue without manual intervention. The product handles real-time data and adjusts dispatch faster and more accurately than human traders can.

Where do you live now, and where would the company be based after YC?

We live and work in San Francisco and plan to keep the company based here after YC.

Explain your decision regarding location.

San Francisco has access to the technical talent and energy industry connections we need. It's also where we're based now, so staying allows us to keep fast iteration and close control of product development.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Rewbi YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Rewbi's public data (launch notes, founder backgrounds, product description). It shows how a company like Rewbi would present itself to YC, not the text they submitted.