Many home all over the world especially in the developed world have stand by generators which are used when the power goes off either because of vagaries of nature or if something else happened that can put the lights off and they actually come in very handy. Home generators assist in keeping the power on during any outage and it may be installed outside the house so as to keep the noise low and also prevent the fumes of the fuel they use to get inside the home and some are usually automatic and they switch on immediately the power goes off.
They use natural gas or propane and so there is no need for refueling but they may also use diesel and petrol and these devices use electricity generation which makes conversion of motive power to power which is electrical and there are many sources which may include hand cranks, combustion engines, water turbines, gas turbines, and steam turbines. There are reputable and experienced companies which provide all kinds of generators and they also do the installing of these generators.
They turn on automatically and one does not need to go outside to crank it up. They know what particular home needs and they go to the site so as to find out what range of power output the home may need and also what kind of generator is suitable for the home.
There are after service work where the dealers of these stand by generators may go and see if the devices are working well and in some cases repairs are done such as when fluid gets accidentally in the generator and makes it not to start or when the battery gets drained and goes cold because of vast coldness or after a period of time. Some home generators have multiple of them which are connected in series so as to produce more electricity depending on the requirement of the home which can be as much as a million of more amperes because they have internal resistance which is low.
The important thing for anyone who wishes to have home generators is to get online and search for the company that deals with these kinds of devices and get in touch so that the process of getting the right kind of machine is on and then the company shown will send its people to check out what is required and after the necessary negotiation are done the installation is done.