Generator Budget turns eight project inputs—coverage, generator size, fuel, run distance, transfer switch, site conditions, state, and panel work—into itemized low, typical, and high installed-cost ranges. Unlike a simple equipment-price lookup, it separates generator equipment, electrical work, fuel connection, site prep, permits, and optional panel work. It is free, works without signup, and publishes its assumptions, source ledger, model version, and benchmark data in CSV and JSON.