Proposal Development: Prepare detailed line-item cost estimates, budget proposals, and final bid packages for RFPs (Requests for Proposals).Vendor & Subcontractor Management: Solicit, review, and negotiate quotes from equipment manufacturers (modules, inverters, racking) and subcontractors (civil, electrical, mechanical).Site Assessments: Evaluate site conditions, geographic challenges, and utility interconnection requirements to anticipate potential cost impacts. Technical Proficiency: Strong proficiency with Microsoft Excel or Google Sheets and energy design & proposal software (EnergyToolbase, Helioscope, PVsyst, Solesca, Aurora, etc.).Solar Expertise: Deep understanding of solar PV technology, racking systems (rooftop, ground mount, carport), inverters, and battery storage (BESS) components.