On 01/12/2020 16:09, Vir Campestris wrote:
On 01/12/2020 10:30, Andy Bennet wrote:
On 01/12/2020 08:56, jon wrote:
Overnight electricity used 29kWh @ 8.863p/kWh = £2.57027

Storage HeatÂ*Â* 1Â*Â*Â* 2.0kW
Storage Heater 2Â*Â*Â* 3.0kW
Water Heater TopÂ*Â*Â* 3.0kWÂ* Water Temp 50C
Water Heater Bottom 3.0kWÂ* Only for Boost
Large FreezerÂ*Â*Â*Â*Â*Â* 1.2kWÂ* Averaged over 24hrs
Large FridgeÂ*Â*Â*Â*Â*Â*Â* 0.8kWÂ* Averaged over 24hrs


I would swop over your top and bottom heaters, you only want to heat
the top for boost.

Depends what you mean by "boost"

I'd use the top heater most of the time, and only turn the bottom one on
when I wanted a bath. No need to heat the bottom of the tank at all most
of the time - half a tank should be OK or a shower.

Unless you're on Economy 7 in which case you run the bottom heater on
off-peak.

--
Max Demian