Free tool
Generator Subscription Cost Calculator
Convert a neighbourhood generator subscription in amperes into kilowatt hours and a monthly cost, so you can see what each appliance is really adding to the bill.
What an ampere actually buys you
A subscription in amperes is a ceiling on how much you can draw at once, not an amount of energy. Ten amperes at 220 volts is 2200 watts available at any moment. Whether that costs you a little or a lot depends entirely on how many of those watts you actually use and for how many hours the generator runs.
That is the difference between flat rate and metered billing. On a flat rate you pay for the ceiling whether you use it or not, so running close to the limit is the only way to get value. On a meter you pay for the energy, so switching things off directly reduces the bill. The calculator shows both so you can see which arrangement suits how you actually live.
The appliance table shows where the energy goes. An air conditioner or a water heater will dominate everything else combined, and on a ten ampere subscription a single AC unit can consume most of the ceiling on its own.