[Andy65]

@KenMavor

In the Bright app itself, if you select the Electricity Tab at the bottom, then towards the top scroll to the left and select '30min' then you'll see your usage for each 30 minute period. You can also toggle between kWh and Cost, if the rates in the app aren't right you can change them yourself.

Unless you want to do in depth analysis I'd suggest the app rather than downloading from glowmarkt.
@geoffers

I wasn't aware that you couldn't submit meter readings if you're on the Drive tariff, do you know why that is?

[geoffers]

Originally Posted by Andy65

I wasn't aware that you couldn't submit meter readings if you're on the Drive tariff, do you know why that is?

It's because they calculate your costs based on the ½ hourly ToU slots, applying the night/daytime rates to the particular time of use.
They don't use the "total" meter readings since - how could they work out when to apply the different tariff rates if they don't know when you were using the leccy?

So that's presumably why the meter reading isn't available on the app/website.

It is for the gas however, as they use the total usage readings to calculate the bill

[Andy65]

@geoffers

Unless I'm missing something here, if you submitted a meter reading they would know to within 30 minutes when that reading was taken and could just bill up to that point couldn't they? The supplier is billing to ToU that they themselves have specified so they would know the meter readings for every 30 minute period.

Equally, they could just give you a 'Bill now' button on the website that generates a bill up to the latest 30 minute period prior to the request.

As far as I can see Next Drive is essentially E7 under a different name but with cheaper prices 🙄, the hours are fixed. Presumably the entire household is on the EV tariff during the 7 hour period, so it's no different to E7 as far as I can see.

[geoffers]

Originally Posted by Andy65

@geoffers

Unless I'm missing something here, if you submitted a meter reading they would know to within 30 minutes when that reading was taken and could just bill up to that point couldn't they? The supplier is billing to ToU that they themselves have specified so they would know the meter readings for every 30 minute period.

Equally, they could just give you a 'Bill now' button on the website that generates a bill up to the latest 30 minute period prior to the request.

As far as I can see Next Drive is essentially E7 under a different name but with cheaper prices 🙄, the hours are fixed. Presumably the entire household is on the EV tariff during the 7 hour period, so it's no different to E7 as far as I can see.

Surely with E7 they must have 2 meter registers/readings: one for the off-peak times and one for the peak times.
So they know the 2 separate values for total-kWh used for off-peak rate and total-kWh used for peak rate

With ToU they don't use the (single) total-kWh reading to calculate the bill: how can they possibly know how much of that reading was the cheap rate and how much was the peak rate.

The meter doesn't store a meter-reading "total" taken every ½hr.... It stores the actual incremental quantity of kWh used for that ½hr.

The way they then calculate the bills for the Next Drive ToU is to total the 14 ½ hourly incremental readings for the seven hours of off-peak leccy and multiply this by the cheaper tariff.

Then do the same for the 34 ½ hourly incremental readings for the seventeen hours of peak rate, multiplying this total by the daytime tariff.

The bill then shows a total kWh used for the bill period (the 2 totals above added together). The total cost calculated above for the night and day rates is then used to display an "averaged" tariff for the period

For instance my last bill was
6.381p/kWh 110.3 kWh =£7.04
23.202p/kWh 114.6 kWh =£26.58

So that equated to an "average" tariff of 14.95p for that month's 224.8kWh of electricity used, shown on the bill as

224.8kWh @ 14.95p/kWh = £33.62

The average value is different every month, depending on the proportion of nighttime/daytime electricity used

[Andy65]

Presumably then @geoffers this is one of the main reasons that you download your usage data, as it seems to be the only way to validate your bill.

I understand the ToU method of calculation and it would make more sense if Drive was similar to the offering from the tentacled supplier where prices fluctuate throughout the day, but as it stands Drive just has two fixed rate periods.

There are obviously some long term objectives at play by them billing the way that they are for this particular tariff.....