These two inverter generators are the NV4000iS and NV2300iS. There is also a similar 4000W model, the NV4000i, with core configurations identical to the NV4000iS. Both main models are equipped with carbon monoxide (CO) sensors, which monitor the carbon monoxide concentration in the environment in real time, adding safety during use and avoiding unexpected risks. In terms of power performance, the two models present a clear gradient: the NV4000iS has a rated power of 4000W (the page indicates 4125 related parameters, presumably peak power or auxiliary output parameters), offering stronger power output and suitable for powering multiple appliances, small devices, or meeting larger power demands, making it suitable for outdoor work, home emergencies, and other scenarios; the NV2300iS has a rated power of 2300W (the page indicates 1800 related parameters, likely stable output power under specific operating conditions), offering advantages in size and weight, balancing portability and practicality, and is suitable for camping, small outdoor activities, or temporary low-power power needs. https://www.novuspowerequipment.com/inverter-generators