Spreadsheets and vendor calculators disagree on size and ROI.

Single suite with NASA POWER irradiance, real tariffs and load profiles.

One defensible design package, faster tender turnaround.

Lender / board rejects designs that lack provenance.

Every figure cites its source; PDF includes Data Provenance appendix.

Designs that pass due diligence the first time.

Designs ignore generator interaction, ATS and uptime.

Hybrid sizing with grid + diesel + battery + ATS engineering.

Real uptime gains, not just panel kWp on paper.