I need a single web-based dashboard that lets commercial facility managers see, at a glance, how each of their solar PV systems is performing. The interface must pull live data through the public or partner APIs of SolisCloud, Fusion Solar, Growatt, Solar Analytics, iSolarCloud and Wattwatchers, then store that data in a database I can host myself—PostgreSQL or another non-proprietary option preferred so I can avoid ongoing subscription fees. For the first release I only require on-screen visualisation (no PDF or emailed reports). The screen should surface the core indicators we usually follow—energy production, energy consumption and overall system efficiency—while leaving room for us to add or hide additional metrics later. Charts, comparative widgets and clear status alerts will suit facility managers far better than raw tables. Core expectations • Build or connect the backend that calls each platform’s API at sensible intervals, normalises units and logs the response. • Design a responsive front-end that loads quickly on large control-room displays as well as on tablets. • Provide clear configuration for adding more inverters or sites without touching code. • Hand over clean source code, database schema and concise setup notes so my team can deploy on our own server. Acceptance criteria 1. All six data sources update successfully in the test environment for at least 24 hours. 2. Dashboards refresh in under five seconds on a standard broadband connection. 3. No commercial or per-seat licensing costs beyond the cloud hosting we already pay for. If you have previous experience aggregating solar or IoT data and can show a quick proof-of-concept call to at least one of the listed APIs, let’s talk timelines.