Shopping for a low THD generator can feel overwhelming given how many specifications manufacturers list, but a handful of numbers matter far more than the rest. Using the AIVOLT Portable Inverter Generator 6000W as a reference point, here's what to actually pay attention to when comparing low THD generators for home, travel, or jobsite use.

THD Percentage. This is the single most important spec for anyone planning to power electronics. Look for a stated figure under 5%, ideally closer to 3% or below. The AIVOLT 6000W publishes a rating of less than 3% THD, generated through its inverter system and 100% copper-wound 322cc engine — a level suitable for laptops, phones, routers, and even medical equipment.

Maximum vs. Continuous Wattage. Manufacturers often advertise peak wattage prominently, but continuous (rated) wattage is what determines actual sustained performance. The AIVOLT 6000W lists 6000W maximum alongside 5500W continuous — a healthy, honest gap that reflects real-world sustainable output rather than an inflated peak figure alone.

Runtime at Various Loads. A single runtime figure rarely tells the full story, since actual usage varies. Look for manufacturers who publish runtime across multiple load levels, as AIVOLT does: up to 13 hours at 25% load, 8 hours at 50%, 5 hours at 75%, and 4.5 hours at full 100% load, all from a 13.5-liter tank. This transparency lets you estimate real-world performance for your specific needs rather than relying on a single best-case number.

Noise Level. Especially relevant for residential, camping, or noise-restricted jobsite use. The AIVOLT 6000W's 62-decibel rating at 25% load is comparable to a normal conversation — a useful benchmark when comparing against competitors that may only quote noise levels at idle rather than under load.

Weight and Portability. A powerful generator is only as useful as your ability to move it. At 56kg, the AIVOLT 6000W includes a telescopic handle and never-flat wheels, addressing a common pain point with heavier inverter units.

Outlet Configuration. Consider what you'll actually plug in. The AIVOLT 6000W offers a 230V AC 32A outlet, two standard 230V 16A sockets, dual USB ports, and a 12V DC charging outlet — a versatile spread covering everything from heavy appliances to small device charging.

Safety Features. Overload protection and oil warning indicators, both included on the AIVOLT 6000W, reduce the risk of damage from operator error or low oil conditions.

When these specs are read together rather than in isolation, they paint a much clearer picture of real-world value than headline wattage numbers alone — and they're exactly the criteria that separate a genuinely low THD generator from one simply marketed as "quiet" or "clean."