The simplest answer to this common question is that a generator works by converting mechanical (or kinetic) energy into electrical energy. This is true of huge generators at power plants, commercial backup generators, and small, portable models.
Lithium batteries were invented and developed in the 1970s and 80s and have totally changed the way we use many electrical appliances. It’s only recently though, that the advantages of lithium battery technology have begun to be available to motorhomes, caravanners, boaters, and anyone who relies on 12V batteries for powering appliances.
Generally no. A straight Lithium 12-volt battery will not be 12 volts. A 12v lithium LiFePO4 battery fully charged to 100% will hold voltage around 13.3-13.4v.
All lithium chemistries are not created equal. In fact, most American consumers – electronic enthusiasts aside – are only familiar with a limited range of lithium solutions. The most common versions are built from cobalt oxide, manganese oxide, and nickel oxide formulations.
A 3,500-watt (3.5KvA) generator can run a large range of home appliances, including heavy-duty things such as a refrigerator, an electric furnace, a microwave, and a television. In general, appliances require a higher wattage amount when they are first started up; during operation, the running wattage typically drops significantly.