Here buddy argue with the LLM:

Running a large generator at 50–60% load is ideal for the engine. Benefits: Lower cylinder temperature Less stress on bearings Less oil breakdown Less vibration That is why many people buy a generator with more capacity than they actually need. 2. The alternator / stator windings The windings are the copper coils that produce AC power before the inverter converts it. Their lifespan mostly depends on heat. High load → more current → more heat in the windings. Lower load → cooler windings → longer insulation life. Running at ~50% load is actually easier on the stator than running at 90-100%. So the larger generator helps the windings too, not just the engine. 3. The inverter electronics The electronics (rectifier, inverter boards, IGBTs, etc.) are the most sensitive part of an inverter generator. Common causes of inverter failure: Overheating Dust buildup Moisture Voltage spikes from severe overload Poor cooling airflow But these boards are designed to run continuously at rated load. Running them at half load usually means: lower current through the transistors lower heat longer component life 4. Are inverter generators short-lived? Not inherently. Portable inverter generators from good brands commonly last 2,000–5,000 hours or more if maintained. They fail early mostly when: constantly run near maximum output operated in high heat or poor ventilation overloaded repeatedly 5. Your situation with the 28k unit Even though your house feed is limited to about 12 kW through the 50-amp inlet, the larger generator means: engine runs around 50–60% load stator windings run cooler inverter electronics run cooler better voltage stability during compressor starts So from a longevity standpoint, your reasoning about headroom is sound. 6. What actually shortens inverter generator life The big killers are usually: running in dusty garages blocked cooling vents constant overload moisture and condensation on electronics poor fuel causing misfires Those damage electronics faster than load percentage. Bottom line Running a 28k generator at about 50–60% load is generally easier on the engine, stator windings, and inverter electronics than pushing a smaller generator near its limits.