@Mushy This is likely tp be a combination of errors.

I believe that the 30 day bill cost will only be correct after the new firmware has run for 30 days (as 'cost' was not recorded previously). So you have 30 days of kWh but less than 30 days of £ value.

The fact that the bill is in the hundreds of pounds, have you entered £34.00 rather than £0.34 in the cost field?

There are significant problems with the new firmware that have been detailed in various threads on this forum. It is unlikely that energy calculations will be correct until the firmware/app are updated.

  @QuestionReality thank you for your response and can confirm I entered my costs as £0.34.   I've also noticed my cost calendar is wrong showing 7 days in October with no data, whereas those dates correspond to a holiday we had in September when the devices weren't used.  It appears the new firmware has some major issues which is a shame as up until then the data was very useful and accurate.  Hope something can be sorted quickly.  

  @Solla-topee thank you for your response.   I looked through your guidance note but unfortunately there is nothing suggesting my configuration is wrong but my data is, for example;

- in my plug for my fridge freezer my 30 day usage is 44.911 but my 30 day cost is only £2.15.   My energy cost is recorded as 0.34£/kWh.

'Having looked at the calendar the energy consumption appears to be correct but the costs are wrong.  For October the appliance used 48.048 but my cost was £303.04

What I have deducted from your contact is my current costs for November are correct at £2.16 with energy usage of 6.354 but this is recorded as a bill for past 30 days cost rather than current month.  
 

Many t

  @Mushy 

I have the same issue. Graphs looks like good and accurate, but the cost calculation is wrong