How low can you go...Daily, Weekly, Monthly, Whatever... electricity grid import

mickyduck55

My Lux inverter does not totally agree with my Sunny Boy Inverter which is connected to my panels but its easier to get all the figures from the LUX App.. there isn't much in it 

204 kWh generated on SMA App
199 kWh on Lux App

Magnitio

February was my first month after installation. Slightly impacted by scaffolding and the installation being finalised, but it's a good start:

Consumed: 275kWh

Yield: 230kWh

Imported: 87kWh (79kWh at 5p/kWh)

Exported: 25kWh (still awaiting registration to get paid for this)

Immersion heater installed for last 9 days and consumed 33kWh. Electric heaters also used on cold sunny days. Both reduced our gas usage.

Spies

March

Generated: 326.4kWh
Self Use: 121kWh (37%)
Imported: 235.2kWh
Cost saving (@20p/kWh): £24.30
SEG: £46.59 (average 23p/kWh)

mickyduck55

March not a great month for me, no solar to speak of in the first week.. still over PVIS by month end though

364.7 kWh Total used
98.3  kWh imported
362.1 kWh generated
80.9  kWh exported

78% of generation used... 

Solar
Best day 20.6 kWh
Worse day 1.1kWh


Exported is higher than I expected, most of it was sent to the grid in the last 8 days!
I am still using my AC (heat pump) to supplement my  GCH... and making all my own bread

Magnitio

March was second month after installation.

Generated: 566kWh

Consumed: 388kWh

Imported: 74kWh (67kWh at 5p/kWh)

Exported: 191kWh (169kWh paid for at 4.1p/kWh)

Immersion: 127kWh

Gas usage down 52% on March last year at 554kWh.

QrizB

• (e) January 2021 - 406kWh imported, 69kWh generated
  
• (e) February - 376kWh imported, 104kWh generated
  
• (e) March - 268kWh imported, 234kWh generated
  
• (e) April - 158kWh imported, 334kWh generated
  
• May - 105kWh imported, 290kWh generated export N/A (meter not fitted).
• June - 92kWh imported, 306kWh generated, export N/A
• July - 99kWh imported, 319kWh generated, 43kWh exported (from 26/06 smart meter installation).
• August - 62kWh imported, 263kWh generated, 183kWh exported (battery commissioned 16/08).
• September  - 75kWh imported, 238kWh generated, 146kWh exported.
• October - 130kWh imported, 171kWh generated, 50kWh exported
• November - 200kWh imported, 94kWh generated, 24kWh exported.
• December - 258kWh imported, 41kWh generated, 7kWh exported.
• January 2022 - 219kWh imported, 84kWh generated, 17kWh exported.
• February - 169kWh imported, 142kWh generated, 51kWh exported.

I'm pretty pleased with that; it's an average for the month of just over 7kWh/day imported, vs. 13.5kWh/day for the same month last year.

How was March? It got off to a slow start - the first fortnight was well behind PVGIS - but picked up nicely.

• March - 146kWh imported, 246kWh generated, 99kWh exported.

Import is down again, from 6kWh/day in February to ~4.7kWh/day in March. Self-consumption of 147kWh (4.7kWh/day) is only up by 0.5kWh/day so I seem to be consuming less in total (longer days so less lighting, perhaps?). I will be importing more overnight from April (see below) but hopefully continue to reduce the peak rate use.

Export of 99kWh is up too and is only likely to rise further as the summer approaches.

My latest Octopus Go statement shows March-ish consumption of ~70kWh off-peak and ~60kWh peak. That off-peak number will increase from April as I'm intending to heat water overnight on the Octopus Go off-peak rate rather than burning gas.

Waywardmike

mickyduck55 said:

Looking at the maps posted I guess I have done OK over the year.. I'm just SW outside London....
Last 20 days of the year very very dull...
PVIS = 3875
Actual= 3825

I'm just reading this thread for the first time, and was interested as I'm having a battery system fitted on the 16th April.

Just came across this chart so thought I'd check mine for the same month especially as we're both using the Sunny Portal.

It's almost a carbon copy, December really was naff!

 

QrizB

A slightly different look but the same general pattern here:

Here is March, for comparrative purposes:

JKenH

Figures for March from myEnergi Zappi (smart meter and FiT meter stats are slightly different so I will stick with the Zappi figures for consistency)

Generated: 515kWh
Self consumed 423kWh

Total Consumed: 835kWh

Imported: 411.5 kWh

Exported: 92 kWh (a lot of that was over 3 days 18-20 March when I went away forc5h3xweekend leaving my wife in charge).

QrizB

QrizB said:

QrizB said:

• (e) January 2021 - 406kWh imported, 93kWh generated
  
• (e) February - 376kWh imported, 97kWh generated
  
• (e) March - 268kWh imported, 224kWh generated
  
• (e) April - 158kWh imported, 351kWh generated
  
• May - 105kWh imported, 324kWh generated export N/A (meter not fitted).
• June - 92kWh imported, 272kWh generated, export N/A
• July - 99kWh imported, 319kWh generated, 43kWh exported (from 26/06 smart meter installation).
• August - 62kWh imported, 256kWh generated, 183kWh exported (battery commissioned 16/08).
• September  - 75kWh imported, 238kWh generated, 146kWh exported.
• October - 130kWh imported, 171kWh generated, 50kWh exported
• November - 200kWh imported, 94kWh generated, 24kWh exported.
• December - 258kWh imported, 41kWh generated, 7kWh exported.
• January 2022 - 219kWh imported, 84kWh generated, 17kWh exported.
• February - 169kWh imported, 142kWh generated, 51kWh exported.

How was March? It got off to a slow start - the first fortnight was well behind PVGIS - but picked up nicely.

• March - 146kWh imported, 246kWh generated, 99kWh exported.
  

April is now behind us (where is the year going) and here are the scores on the doors:

• April - 132kWh imported, 300kWh generated (105% of PVGIS), 179kWh exported (60% of generation).

Import is still 4.5kWh/day but that does include 14 days where I used off-peak Go to heat water (other days I expected to have enough solar PV to do it during the day instead).

Self-consumption of 121kWh (4kWh/day) is disappointingly low and I have a strong suspicion I'll find my 12-month export total to be over the 50% deemed figure despite my best efforts.

Compared to last April I've imported 26kWh less (good) but have generated 51kWh less (bad, but not under my control).

My latest Octopus Go statement shows April-ish consumption of ~100kWh off-peak and ~40kWh peak, for an average price of 7.9p/kWh, which is all quite satisfying. I'm not looking forward to September when (hopefully) I'll be able to renew Go or (if not) need a new tariff.

Edited to correct errors I spotted on re-reading!