What are the largest units of electricity?

Answer 1

Quantity of Electricity is measured in Coulombs (as standardized by NIST in SI physics units.)

Other electrical quantities are:

Rate of electricity flow or current, coulombs per second, defined as Amperes

Electrical potential: Volts

Other units (not necessarily electrical)

Energy: joules

Rate of energy flow: joules of energy per second, defined as Watts

Additional Answer

In the United Kingdom, electricity companies charge their customers by the 'unit'.

The term 'unit' is short for the obsolete expression 'Board of Trade Unit', and is a measurement of electrical energy, equivalent to a kilowatt-hour. (KW.h for short.) So, 1 unit = 1 kW.h.

Answer 2

watt

Answer

A 'unit' is short for 'Board of Trade Unit', and is equal to a kilowatt hour, used in Britain to measure the quantity of energy purchased from a Utility company.

Answer 3

Googal watt describing the energy given off by by an entire galaxy(1 standard Milkiway dropped into a rotating blackhole with a circumference measured in parsecs, and mass measuring a kilo Milkiway. The energy given off would be defined as one googal watt.

This has yet to be determined by calculation

Answer 4

There is no limit to the units, but we generally don't need to go beyond Gigawatts ( a Gigawatt is 109 watts, or 1000 Megawatts)