It prevents electrical surges, protects your home from things like electrical fires, and prevents you from getting shocked if an errant surge runs through your power line. Without grounded wires, your appliances could also get damaged during lightning storms.

Different fences use different amounts of electricity, but their operating costs are very low overall. Electric fences pull between 4 and 25 watts from the system if you have an average-sized yard. Barring any complicated math, you can expect an average electric fence to cost less than $5 a month to run. Aboveground electric fences, which are not typical for residential use or small animals, can cost more, but you shouldn't notice a significant change in your electric bill. 

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

If wiring in a relatively modern home is damaged due to sudden events like a fire, a tree falling into the house, or a flood, then homeowners insurance is very likely to cover the cost of replacing the wire.

However, if it’s determined that wiring failed or started the fire because of age, neglect, or not meeting current electrical standards, then insurance won’t be covering any replacement. Also, insurance policies may charge more for particularly old kinds of wiring like aluminum wiring or deny applications altogether.