Dual tariff unit
- Thread starter petend
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A pic of your cu and meter setup will help.
Do you have storage heaters?
No, it won't magically switch.
You can get external contactors, so I would go with one of them, switched by the signal provided
You can get external contactors, so I would go with one of them, switched by the signal provided
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I found the tariff question not as straight forward as I would have liked. It needs some careful sums.
The peak tariff, is higher than a standard tariff, it varies area to area and provider to provider, but if we consider standard at 25p, off-peak 20p and peak 30p then simple maths shows half or more of the power used needs to be off-peak.
But the maths is not that simple, if not using storage radiators then no need to heat rooms when not being used, There must be a formula to work out how long a room needs to be used for, to be worth using storage radiators. But in real terms, one has to test, and also consider what else can use off-peak.
I only have 5 hours, not 7 hours, off-peak, and around 8.5p and 31p per kWh, today I ran out of off-peak at 3:30 pm as very little solar, and batteries not that large, but 00:30 to 15:30 off-peak so just 8.5 hours using peak power, as the battery means using off-peak for 5 + 10 = 15 hours, so 9 hours peak power, would be hard even on bad days to use more peak power to off-peak.
The peak tariff, is higher than a standard tariff, it varies area to area and provider to provider, but if we consider standard at 25p, off-peak 20p and peak 30p then simple maths shows half or more of the power used needs to be off-peak.
But the maths is not that simple, if not using storage radiators then no need to heat rooms when not being used, There must be a formula to work out how long a room needs to be used for, to be worth using storage radiators. But in real terms, one has to test, and also consider what else can use off-peak.
I only have 5 hours, not 7 hours, off-peak, and around 8.5p and 31p per kWh, today I ran out of off-peak at 3:30 pm as very little solar, and batteries not that large, but 00:30 to 15:30 off-peak so just 8.5 hours using peak power, as the battery means using off-peak for 5 + 10 = 15 hours, so 9 hours peak power, would be hard even on bad days to use more peak power to off-peak.
There is a rule of Thumb. For example, if you use 70% of energy at night rate in winter, then you are better of on E7
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