I built a Solar Payback Calculator for US, UK, and PK markets. Feedback appreciated!

Hi Indie Hackers,

I recently noticed that while solar energy is booming, most homeowners struggle to calculate their actual Return on Investment (ROI) due to complex utility rates and varying sun hours.

To solve this, I built SolarIQ—a simple, interactive calculator that currently supports US, UK, and Pakistan markets with localized currencies and energy data.

Key features:

• Interactive Payback Period estimation.

• 20-year savings projection charts.

• Environment impact (CO2 savings) stats.

I'm looking for feedback from the IH community, especially from those in the US and UK: Do the default sun hours and electricity rates feel accurate for your region?

Check it out here: [https://solaryield2026.netlify.app/]