From Energy Expertise to Working AI App — Without Writing a Line of Code

When Lucy, a renewable energy founder based in Singapore, set out to build a solar calculator, she wasn’t looking to code. She was looking to solve a real problem — homeowners were overwhelmed with energy choices, and suppliers were struggling to stand out.

She had the know-how, the formula, and the user pain point. What she didn’t have? A dev team.

So she turned to no-code — and more specifically, a full-stack builder called Momen — to bring her idea to life in less than a week.

The Problem: Too Much Tech, Not Enough Clarity

Anyone who’s tried to size a solar panel system knows it’s not simple. You need to:

• Estimate your household power needs

• Factor in daily solar irradiance at your location

• Choose the right mix of batteries, inverters, and panels

Lucy wanted to make this approachable — ideally through an AI-guided assistant that could talk to users, gather relevant info, and run the calculations behind the scenes.

How She Built It: AI-Guided, No-Code, All-in-One

Here’s what her app does:

1. Conversational Input — Users interact with an AI assistant that dynamically asks questions based on their answers. Have a pool? It’ll ask about pumps. Live in a cloudy area? It adjusts expectations.

2. Real-Time Data Processing — The app uses Google Maps API to convert an address into coordinates, then runs a solar irradiance formula on the backend.

3. Energy Recommendation — Once the info is gathered, a second AI agent calculates the number of solar panels and batteries needed. All results are shown in a clean UI.

The best part? Lucy built all this using Momen, a visual development tool that lets you create full-stack apps with or without code. She used its agent builder for the conversation logic, conditional views for smart UI rendering, and a native database for appliance and solar data.

Why Not Just Use Bubble or ChatGPT?

Lucy had tried those paths before. Bubble gave her UI flexibility, but building logic-heavy flows became frustrating. AI tools like GPT were great at answering questions — not running full workflows.

With Momen, she could:

• Write and tweak prompts for logic

• Use code where needed, without losing the visual builder

• Keep frontend, backend, and AI all in one tool

It wasn’t a hacky prototype. It was a real app — production-ready, and fast.

For Founders Without Code

If you’re a non-technical founder sitting on years of industry expertise, this is a reminder: you don’t need to be technical to build something valuable.

Lucy didn’t start with “what tech stack should I use.” She started with “what problem am I solving?” Then used the tool that let her move fast and stay in control.

👉 Want to see how it works?
Check out the full case study (with screenshots + app breakdown):
🔗 https://momen.app/blogs/ai-energy-app-built-with-momen/