Solar Calculator Development via WordPress "Calculated Fields Form" (Net-Billing & Off-Grid)

Project Description:
We are looking for an experienced WordPress developer with strong JavaScript skills to build a functional Solar PV Calculator using the Calculated Fields Form plugin. The calculator will help users in Greece estimate their solar system size, cost, and payback period.
Key Features Required:
1. User Inputs: Monthly electricity consumption (kWh), Location/Region (Dropdown to determine Peak Sun Hours), System Type (Radio: Net-Billing vs Off-Grid), Available roof surface (m²).
2. Conditional Logic: Battery storage calculations should only appear if "Off-Grid" is selected.
3. Advanced JS Formulas: Implement precise formulas for required kW power, number of 450W panels needed, battery Ah (for off-grid), and estimated system cost.
4. Validation: Warning alerts if the required panel surface exceeds the user's available roof space.
5. Lead Generation: Integration with email forms so users can request a detailed PDF quote with their results.
6. Responsive Design: Clean layout that matches our website's CSS theme.
Required Skills:
• WordPress & Calculated Fields Form plugin
• Advanced JavaScript / jQuery
• HTML5 / CSS3

We have already ready the architecture and all JavaScripts for the program and we have Calculated Fields Form premium (paid version)

Need to add this Solar Calculator in 4 wordpress sites

We are looking for an experienced WordPress developer with strong JavaScript skills