Mission: Eradicate the Guesswork in Solar.
Every day, thousands of Nigerians invest in solar systems that either fail prematurely or are massively over-designed, wasting hard-earned money. **RaySizer NG** was built to fix that.
Precision First
We don't use 'estimates'. Our tool uses actual wattage data for common Nigerian brands and local irradiance data.
User Focused
Built for every Nigerian—from small apartments to large businesses. No engineering degree required.
Local Context
RaySizer accounts for Nigerian electricity tariffs (Nerc bands) and generator fuel costs.
Transparent ROI
We show you exactly when your solar investment pays for itself compared to the grid and gen.
Our Story
It started in Lagos, with a simple question: "Why is my solar system not powering my fridge despite the installer's promise?" The answer was often a lack of precise calculation.
Today, RaySizer is Nigeria's most trusted open-access solar sizing calculator, helping thousands plan their energy future with confidence.