NightSaver Meter
A Nightsaver meter allows users to avail of cheaper electricity at night.
You can take advantage of the discounted night time rate by turning your immersion heater on overnight, as this will likely be one of your largest energy users, if you use electricity to supply DHW.
This is also true if you have a heat pump running a heating cycle during the night.
It’s also a good idea to out a good lagging jacket on the cylinder if it doesn’t already have one installed.