Annual electricity standing charges, vary hugely across tarriffs, starting as low as around €218, and going up to more than €370 annually, depending on urban/rural, smart, 24 hour or day/night tarriff.
Some smart meter tariffs have very low unit rates but for limited periods, like Pinergy have one for 5.45 cent inc vat, for 3 hours at night, energia have one for 4 hours at night for 7.54 cent inc vat. Neither of these tarroffs have peak rates
There are day/night tariffs also where night rate is higher than the two above. but more flexible as its for 9 hours per night.
These low night rates are often counterbalanced, by higher day rates than some 24 hour tariffs. Then there are the “carrot” tariffs of free weekend electricity, which is not free, as the non free days are always higher, and they tend to be very inflexible tariffs.
You can have a smart meter and still be on a day/night tariff, but once you switch to a smart tariff it is difficult, if not impossible to switch back. I have a smart meter but on a day/night tariff currently, 55 % night last year, however looking to move to a smart tariff at the moment, as PV installed recently, and batteries are enroute soon, so makes sense to do this.
It is after getting quite complicated to asses the hundreads of tariffs, as now those with PV have to consider the export rate which varies, starying around 18cent up to 25cent, currently, the highest export rate available, and those with smart meters have to be aware of their detailed time of day usage, to determine the best fit for their circumstances.
You need detailed information, to correctly identify the most beneficial plan for your own individual setup/circumstances, but focus on:
the unit rates by time- day, peak, night.
the annual standing charges,
the export rate, if PV is applicable,
and another variable for PV systems, is your battery size, as that can be charged at a very low night rate, and power your home fully or partially, during the day & peak rates, if sufficiently big enough.
Ignore “20% off”, as its all about the unit costs.
Tools like Energypal are very helpful, but once data is known, it is actual usage behaviour changes, is very beneficial - timed applicances and hot water heating etc.
For some, it is easy to move much more 50 % of annual usage to night rates, this becomes more important if you have a heatpump, or an EV, but even if you don’t, having a PV system with a battery can help with this.