How Much Cheaper is Electricity With a Night Saver Meter?

If you have a night meter installed and are signed up to a NightSaver tariff with your electricity supplier – you will be charged less for the electricity you use at night. (It is NOT cheaper for everyone at night)

If you are on a Nightsaver tariff – the cheaper night-time rates run from

  • 11 pm-8 am (End October to end of March)
  • from midnight to 9 am in the summer months.

But – there is a catch – the lower night rates are balanced by a slightly higher day unit cost and a slightly higher standing charge.

Compare the night saver prices from all the different Electricity providers here at

Normal Tariff Compared to NightSaver

Prices from Electric Ireland (May 2020)

Prices ex VATNormal TariffNightSaver Tariff
Day Rate16.93c18.06c
Night Rate16.93c8.92c
Standing Charge €147.35€199.98

A night saver tariff will only work out cheaper if you use a significant amount of electricity at night. Homes with electric storage heaters, electric car chargers and heat pumps will be able to use more electricity at night.

For example, an EV charger could use about 6Kwh overnight . (Based on mileage of 18000km per annum, 15kWh/ 100kms and 80% home charging at night).

A Heat pump set to heat the hot water overnight might use about 4kWh a night . (based on 10kWh of hot water at a Coefficient of performance of 2.5)

Keeping an immersion heater (3,000 watts) on for 1 hour at night instead of during the day would use 3kwh (units) – so that alone would be enough in the average household to make nightsaver worthwhile . ) Of course -this would only be money saving if you didn’t also have to put the immersion on more often in the day .

So – as you can see from the figures below , to make a saving on nightsaver rates – 30% or more of your electricity usage would need to be during the night-rate period. This would equate to around 3 units. (based on average usage of 11 units per day (or 4,200kWh annually) )


How Much Could You Save on NightSaver

Percentage of Night Usage30%40%50%60%70%
Normal Tariff€1013 €1013 €1013 €1013 €1013
Nightsaver Tariff€995 €952 €909 €865 €822
Annual Saving€18 €61 €105 €148 €191

Figures are based on Electric Ireland charges. Cheaper prices may be available from other suppliers

You can compare the night saver prices from all the different Electricity providers at

Getting a NightSaver Meter is free. Just call your electricity supplier to request one and they’ll arrange for ESB Networks to call out to your house and install one.