It's a Fuelless noiseless and smokeless generator that uses battery and has an alternator that regulates the system so while running it's charging automatically.
20hours of usage daily while battery lasts (6-8 years) before getting weak.
The generator is also of 0carbon meaning can be installed both in and out door and will cause no harm to human/animals health.
Durability is Top notch with 2years warranty/Refundable Policy.